// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package proxy

import (
	"bytes"
	"context"
	"encoding/binary"
	"fmt"
	"math/rand"
	"strconv"
	"strings"
	"testing"
	"time"

	"github.com/bytedance/mockey"
	"github.com/cockroachdb/errors"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
	"github.com/stretchr/testify/require"
	"google.golang.org/grpc"
	"google.golang.org/protobuf/proto"

	"github.com/milvus-io/milvus-proto/go-api/v3/commonpb"
	"github.com/milvus-io/milvus-proto/go-api/v3/milvuspb"
	"github.com/milvus-io/milvus-proto/go-api/v3/msgpb"
	"github.com/milvus-io/milvus-proto/go-api/v3/schemapb"
	"github.com/milvus-io/milvus/internal/allocator"
	"github.com/milvus-io/milvus/internal/json"
	"github.com/milvus-io/milvus/internal/mocks"
	"github.com/milvus-io/milvus/internal/proxy/shardclient"
	"github.com/milvus-io/milvus/internal/querycoordv2/meta"
	"github.com/milvus-io/milvus/internal/util/function/embedding"
	"github.com/milvus-io/milvus/internal/util/indexparamcheck"
	"github.com/milvus-io/milvus/pkg/v3/common"
	"github.com/milvus-io/milvus/pkg/v3/mq/msgstream"
	"github.com/milvus-io/milvus/pkg/v3/proto/indexpb"
	"github.com/milvus-io/milvus/pkg/v3/proto/internalpb"
	"github.com/milvus-io/milvus/pkg/v3/proto/querypb"
	"github.com/milvus-io/milvus/pkg/v3/proto/rootcoordpb"
	"github.com/milvus-io/milvus/pkg/v3/util/commonpbutil"
	"github.com/milvus-io/milvus/pkg/v3/util/funcutil"
	"github.com/milvus-io/milvus/pkg/v3/util/merr"
	"github.com/milvus-io/milvus/pkg/v3/util/metric"
	"github.com/milvus-io/milvus/pkg/v3/util/paramtable"
	"github.com/milvus-io/milvus/pkg/v3/util/testutils"
	"github.com/milvus-io/milvus/pkg/v3/util/timerecord"
	"github.com/milvus-io/milvus/pkg/v3/util/typeutil"
	"github.com/milvus-io/milvus/pkg/v3/util/uniquegenerator"
)

// TODO(dragondriver): add more test cases

const (
	maxTestStringLen     = 100
	testBoolField        = "bool"
	testInt32Field       = "int32"
	testInt64Field       = "int64"
	testFloatField       = "float"
	testDoubleField      = "double"
	testVarCharField     = "varChar"
	testFloatVecField    = "fvec"
	testBinaryVecField   = "bvec"
	testFloat16VecField  = "f16vec"
	testBFloat16VecField = "bf16vec"
	testStructArrayField = "structArray"
	testTTLField         = "ttl"
	testGeometryField    = "geometry"
	testVecDim           = 128
	testMaxVarCharLength = 100
)

func genCollectionSchema(collectionName string) *schemapb.CollectionSchema {
	return constructCollectionSchemaWithAllType(
		testBoolField,
		testInt32Field,
		testInt64Field,
		testFloatField,
		testDoubleField,
		testFloatVecField,
		testBinaryVecField,
		testFloat16VecField,
		testBFloat16VecField,
		testStructArrayField,
		testGeometryField,
		testVecDim,
		collectionName)
}

func constructCollectionSchema(
	int64Field, floatVecField string,
	dim int,
	collectionName string,
) *schemapb.CollectionSchema {
	pk := &schemapb.FieldSchema{
		FieldID:      100,
		Name:         int64Field,
		IsPrimaryKey: true,
		Description:  "",
		DataType:     schemapb.DataType_Int64,
		TypeParams:   nil,
		IndexParams:  nil,
		AutoID:       true,
	}
	fVec := &schemapb.FieldSchema{
		FieldID:      101,
		Name:         floatVecField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_FloatVector,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   common.DimKey,
				Value: strconv.Itoa(dim),
			},
		},
		IndexParams: nil,
		AutoID:      false,
	}
	return &schemapb.CollectionSchema{
		Name:        collectionName,
		Description: "",
		AutoID:      false,
		Fields: []*schemapb.FieldSchema{
			pk,
			fVec,
		},
		Properties: []*commonpb.KeyValuePair{
			{
				Key:   common.CollectionTTLConfigKey,
				Value: "15",
			},
		},
	}
}

func constructCollectionSchemaEnableDynamicSchema(
	int64Field, floatVecField string,
	dim int,
	collectionName string,
) *schemapb.CollectionSchema {
	pk := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         int64Field,
		IsPrimaryKey: true,
		Description:  "",
		DataType:     schemapb.DataType_Int64,
		TypeParams:   nil,
		IndexParams:  nil,
		AutoID:       true,
	}
	fVec := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         floatVecField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_FloatVector,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   common.DimKey,
				Value: strconv.Itoa(dim),
			},
		},
		IndexParams: nil,
		AutoID:      false,
	}
	return &schemapb.CollectionSchema{
		Name:               collectionName,
		Description:        "",
		AutoID:             false,
		EnableDynamicField: true,
		Fields: []*schemapb.FieldSchema{
			pk,
			fVec,
		},
	}
}

func ConstructCollectionSchemaWithPartitionKey(collectionName string, fieldName2DataType map[string]schemapb.DataType, primaryFieldName string, partitionKeyFieldName string, autoID bool) *schemapb.CollectionSchema {
	schema := constructCollectionSchemaByDataType(collectionName, fieldName2DataType, primaryFieldName, autoID)
	for _, field := range schema.Fields {
		if field.Name == partitionKeyFieldName {
			field.IsPartitionKey = true
		}
	}

	return schema
}

func constructCollectionSchemaByDataType(collectionName string, fieldName2DataType map[string]schemapb.DataType, primaryFieldName string, autoID bool) *schemapb.CollectionSchema {
	fieldsSchema := make([]*schemapb.FieldSchema, 0)

	idx := int64(100)
	for fieldName, dataType := range fieldName2DataType {
		fieldSchema := &schemapb.FieldSchema{
			FieldID:  idx,
			Name:     fieldName,
			DataType: dataType,
		}
		idx++
		if typeutil.IsVectorType(dataType) {
			fieldSchema.TypeParams = []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: strconv.Itoa(testVecDim),
				},
			}
		}
		if dataType == schemapb.DataType_VarChar {
			fieldSchema.TypeParams = []*commonpb.KeyValuePair{
				{
					Key:   common.MaxLengthKey,
					Value: strconv.Itoa(testMaxVarCharLength),
				},
			}
		}
		if fieldName == primaryFieldName {
			fieldSchema.IsPrimaryKey = true
			fieldSchema.AutoID = autoID
		}

		fieldsSchema = append(fieldsSchema, fieldSchema)
	}

	return &schemapb.CollectionSchema{
		Name:   collectionName,
		Fields: fieldsSchema,
	}
}

func newTextSchemaForStorageV3Test(collectionName string) *schemapb.CollectionSchema {
	return &schemapb.CollectionSchema{
		Name: collectionName,
		Fields: []*schemapb.FieldSchema{
			{FieldID: 100, Name: testInt64Field, DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
			{FieldID: 101, Name: "text", DataType: schemapb.DataType_Text},
			{
				FieldID:  102,
				Name:     testFloatVecField,
				DataType: schemapb.DataType_FloatVector,
				TypeParams: []*commonpb.KeyValuePair{
					{Key: common.DimKey, Value: strconv.Itoa(testVecDim)},
				},
			},
		},
	}
}

func constructCollectionSchemaWithTTLField(collectionName string, ttlField string) *schemapb.CollectionSchema {
	pk := &schemapb.FieldSchema{
		FieldID:      100,
		Name:         int64Field,
		IsPrimaryKey: true,
		Description:  "",
		DataType:     schemapb.DataType_Int64,
		TypeParams:   nil,
		IndexParams:  nil,
		AutoID:       true,
	}
	tz := &schemapb.FieldSchema{
		FieldID:      101,
		Name:         ttlField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_Timestamptz,
		TypeParams:   nil,
		IndexParams:  nil,
		AutoID:       false,
	}
	fVec := &schemapb.FieldSchema{
		FieldID:      102,
		Name:         floatVecField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_FloatVector,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   common.DimKey,
				Value: strconv.Itoa(dim),
			},
		},
		IndexParams: nil,
		AutoID:      false,
	}
	return &schemapb.CollectionSchema{
		Name:        collectionName,
		Description: "",
		AutoID:      false,
		Fields: []*schemapb.FieldSchema{
			pk,
			tz,
			fVec,
		},
		Properties: []*commonpb.KeyValuePair{},
	}
}

func constructCollectionSchemaWithAllType(
	boolField, int32Field, int64Field, floatField, doubleField string,
	floatVecField, binaryVecField, float16VecField, bfloat16VecField, structArrayField string,
	geometryField string,
	dim int,
	collectionName string,
) *schemapb.CollectionSchema {
	b := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         boolField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_Bool,
		TypeParams:   nil,
		IndexParams:  nil,
		AutoID:       false,
	}
	i32 := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         int32Field,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_Int32,
		TypeParams:   nil,
		IndexParams:  nil,
		AutoID:       false,
	}
	i64 := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         int64Field,
		IsPrimaryKey: true,
		Description:  "",
		DataType:     schemapb.DataType_Int64,
		TypeParams:   nil,
		IndexParams:  nil,
		AutoID:       false,
	}
	f := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         floatField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_Float,
		TypeParams:   nil,
		IndexParams:  nil,
		AutoID:       false,
	}
	d := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         doubleField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_Double,
		TypeParams:   nil,
		IndexParams:  nil,
		AutoID:       false,
	}
	fVec := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         floatVecField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_FloatVector,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   common.DimKey,
				Value: strconv.Itoa(dim),
			},
		},
		IndexParams: nil,
		AutoID:      false,
	}
	bVec := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         binaryVecField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_BinaryVector,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   common.DimKey,
				Value: strconv.Itoa(dim),
			},
		},
		IndexParams: nil,
		AutoID:      false,
	}
	f16Vec := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         float16VecField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_Float16Vector,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   common.DimKey,
				Value: strconv.Itoa(dim),
			},
		},
		IndexParams: nil,
		AutoID:      false,
	}
	bf16Vec := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         bfloat16VecField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_BFloat16Vector,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   common.DimKey,
				Value: strconv.Itoa(dim),
			},
		},
		IndexParams: nil,
		AutoID:      false,
	}
	g := &schemapb.FieldSchema{
		FieldID:      0,
		Name:         geometryField,
		IsPrimaryKey: false,
		Description:  "",
		DataType:     schemapb.DataType_Geometry,
		TypeParams:   nil,
		IndexParams:  nil,
		AutoID:       false,
	}

	// StructArrayField schema for testing
	structArrayFields := []*schemapb.StructArrayFieldSchema{
		{
			FieldID:     0,
			Name:        structArrayField,
			Description: "test struct array field",
			Fields: []*schemapb.FieldSchema{
				{
					FieldID:     0,
					Name:        "sub_varchar_array",
					DataType:    schemapb.DataType_Array,
					ElementType: schemapb.DataType_VarChar,
					TypeParams: []*commonpb.KeyValuePair{
						{
							Key:   common.MaxLengthKey,
							Value: strconv.Itoa(testMaxVarCharLength),
						},
						{
							Key:   common.MaxCapacityKey,
							Value: "100",
						},
					},
				},
				{
					FieldID:     0,
					Name:        "sub_vector_array",
					DataType:    schemapb.DataType_ArrayOfVector,
					ElementType: schemapb.DataType_FloatVector,
					TypeParams: []*commonpb.KeyValuePair{
						{
							Key:   common.DimKey,
							Value: strconv.Itoa(dim),
						},
						{
							Key:   common.MaxCapacityKey,
							Value: "10",
						},
					},
				},
			},
		},
	}

	schema := &schemapb.CollectionSchema{
		Name:              collectionName,
		Description:       "",
		AutoID:            false,
		StructArrayFields: structArrayFields,
	}

	if enableMultipleVectorFields {
		schema.Fields = []*schemapb.FieldSchema{
			b,
			i32,
			i64,
			f,
			d,
			fVec,
			bVec,
			f16Vec,
			bf16Vec,
			g,
		}
	} else {
		schema.Fields = []*schemapb.FieldSchema{
			b,
			i32,
			i64,
			f,
			d,
			fVec,
			// bVec,
			g,
		}
	}

	return schema
}

func TestAlterCollection_AllowInsertAutoID_Validation(t *testing.T) {
	ctx := context.Background()

	buildRoot := func(autoID bool) *mocks.MockMixCoordClient {
		root := mocks.NewMockMixCoordClient(t)
		// InitMetaCache requires ListPolicy
		root.EXPECT().ListPolicy(mock.Anything, mock.Anything, mock.Anything).Return(&internalpb.ListPolicyResponse{Status: merr.Success()}, nil).Once()
		// Meta cache update path fetches partitions info
		root.EXPECT().ShowPartitions(mock.Anything, mock.Anything, mock.Anything).Return(&milvuspb.ShowPartitionsResponse{Status: merr.Success()}, nil).Maybe()
		// DescribeCollection returns a schema with PK autoID configurable
		root.EXPECT().DescribeCollection(mock.Anything, mock.Anything, mock.Anything).Return(&milvuspb.DescribeCollectionResponse{
			Status:       merr.Success(),
			CollectionID: 1,
			DbName:       dbName,
			Schema: &schemapb.CollectionSchema{
				Name:   "allow_autoid_test",
				AutoID: false,
				Fields: []*schemapb.FieldSchema{
					{FieldID: 100, Name: "pk", IsPrimaryKey: true, DataType: schemapb.DataType_Int64, AutoID: autoID},
					{FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: common.DimKey, Value: "8"}}},
				},
			},
		}, nil).Maybe()
		return root
	}

	t.Run("success when PK autoID=true and allow_insert_autoid=true", func(t *testing.T) {
		cache := globalMetaCache
		defer func() { globalMetaCache = cache }()
		root := buildRoot(true)
		err := InitMetaCache(ctx, root)
		assert.NoError(t, err)

		task := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollectionField},
				DbName:         dbName,
				CollectionName: "allow_autoid_test",
				Properties: []*commonpb.KeyValuePair{
					{Key: common.AllowInsertAutoIDKey, Value: "true"},
				},
			},
		}
		err = task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("error when PK autoID=false and allow_insert_autoid=true", func(t *testing.T) {
		cache := globalMetaCache
		defer func() { globalMetaCache = cache }()
		root := buildRoot(false)
		err := InitMetaCache(ctx, root)
		assert.NoError(t, err)

		task := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollectionField},
				DbName:         dbName,
				CollectionName: "allow_autoid_test",
				Properties: []*commonpb.KeyValuePair{
					{Key: common.AllowInsertAutoIDKey, Value: "true"},
				},
			},
		}
		err = task.PreExecute(ctx)
		assert.Error(t, err)
	})
}

func constructPlaceholderGroup(
	nq, dim int,
) *commonpb.PlaceholderGroup {
	values := make([][]byte, 0, nq)
	for i := 0; i < nq; i++ {
		bs := make([]byte, 0, dim*4)
		for j := 0; j < dim; j++ {
			var buffer bytes.Buffer
			f := rand.Float32()
			err := binary.Write(&buffer, common.Endian, f)
			if err != nil {
				panic(err)
			}
			bs = append(bs, buffer.Bytes()...)
		}
		values = append(values, bs)
	}

	return &commonpb.PlaceholderGroup{
		Placeholders: []*commonpb.PlaceholderValue{
			{
				Tag:    "$0",
				Type:   commonpb.PlaceholderType_FloatVector,
				Values: values,
			},
		},
	}
}

func constructSearchRequest(
	dbName, collectionName string,
	expr string,
	floatVecField string,
	nq, dim, nprobe, topk, roundDecimal int,
) *milvuspb.SearchRequest {
	params := make(map[string]string)
	params["nprobe"] = strconv.Itoa(nprobe)
	b, err := json.Marshal(params)
	if err != nil {
		panic(err)
	}
	plg := constructPlaceholderGroup(nq, dim)
	plgBs, err := proto.Marshal(plg)
	if err != nil {
		panic(err)
	}

	return &milvuspb.SearchRequest{
		Base:           nil,
		DbName:         dbName,
		CollectionName: collectionName,
		PartitionNames: nil,
		Dsl:            expr,
		SearchInput: &milvuspb.SearchRequest_PlaceholderGroup{
			PlaceholderGroup: plgBs,
		},
		DslType:      commonpb.DslType_BoolExprV1,
		OutputFields: nil,
		SearchParams: []*commonpb.KeyValuePair{
			{
				Key:   common.MetricTypeKey,
				Value: metric.L2,
			},
			{
				Key:   ParamsKey,
				Value: string(b),
			},
			{
				Key:   AnnsFieldKey,
				Value: floatVecField,
			},
			{
				Key:   TopKKey,
				Value: strconv.Itoa(topk),
			},
			{
				Key:   RoundDecimalKey,
				Value: strconv.Itoa(roundDecimal),
			},
		},
		TravelTimestamp:    0,
		GuaranteeTimestamp: 0,
	}
}

func TestTranslateOutputFields(t *testing.T) {
	const (
		idFieldName                = "id"
		tsFieldName                = "timestamp"
		floatVectorFieldName       = "float_vector"
		binaryVectorFieldName      = "binary_vector"
		float16VectorFieldName     = "float16_vector"
		bfloat16VectorFieldName    = "bfloat16_vector"
		sparseFloatVectorFieldName = "sparse_float_vector"
	)
	var outputFields []string
	var userOutputFields []string
	var userDynamicFields []string
	var requestedPK bool
	var err error

	collSchema := &schemapb.CollectionSchema{
		Name:        "TestTranslateOutputFields",
		Description: "TestTranslateOutputFields",
		AutoID:      false,
		Fields: []*schemapb.FieldSchema{
			{Name: idFieldName, FieldID: 0, DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
			{Name: tsFieldName, FieldID: 1, DataType: schemapb.DataType_Int64},
			{Name: floatVectorFieldName, FieldID: 100, DataType: schemapb.DataType_FloatVector},
			{Name: binaryVectorFieldName, FieldID: 101, DataType: schemapb.DataType_BinaryVector},
			{Name: float16VectorFieldName, FieldID: 102, DataType: schemapb.DataType_Float16Vector},
			{Name: bfloat16VectorFieldName, FieldID: 103, DataType: schemapb.DataType_BFloat16Vector},
			{Name: sparseFloatVectorFieldName, FieldID: 104, DataType: schemapb.DataType_SparseFloatVector, IsFunctionOutput: true},
		},
		Functions: []*schemapb.FunctionSchema{
			{
				Name:             "bm25",
				Type:             schemapb.FunctionType_BM25,
				OutputFieldNames: []string{sparseFloatVectorFieldName},
				// omit other fields for brevity
			},
		},
	}
	schema := newSchemaInfo(collSchema)

	// Test empty output fields
	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{}, schema, false)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{}, outputFields)
	assert.ElementsMatch(t, []string{}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.False(t, requestedPK)

	// Test single field
	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{idFieldName}, schema, false)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{idFieldName}, outputFields)
	assert.ElementsMatch(t, []string{idFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	// Test multiple fields
	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{idFieldName, tsFieldName}, schema, false)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{idFieldName, tsFieldName}, outputFields)
	assert.ElementsMatch(t, []string{idFieldName, tsFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	// Test with vector field
	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{idFieldName, tsFieldName, floatVectorFieldName}, schema, false)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{idFieldName, tsFieldName, floatVectorFieldName}, outputFields)
	assert.ElementsMatch(t, []string{idFieldName, tsFieldName, floatVectorFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	// Test without id field
	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{tsFieldName, floatVectorFieldName}, schema, false)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName}, outputFields)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.False(t, requestedPK)

	// Test wildcard - should not include function output fields
	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{"*"}, schema, false)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{idFieldName, tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, outputFields)
	assert.ElementsMatch(t, []string{idFieldName, tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	// Test wildcard with spaces
	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{" * "}, schema, false)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{idFieldName, tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, outputFields)
	assert.ElementsMatch(t, []string{idFieldName, tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	_, _, _, _, _, err = translateOutputFields([]string{"*", sparseFloatVectorFieldName}, schema, false)
	assert.Error(t, err)
	_, _, _, _, _, err = translateOutputFields([]string{sparseFloatVectorFieldName}, schema, false)
	assert.Error(t, err)
	_, _, _, _, _, err = translateOutputFields([]string{sparseFloatVectorFieldName}, schema, true)
	assert.Error(t, err)

	// Test with removePkField=true
	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{}, schema, true)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{}, outputFields)
	assert.ElementsMatch(t, []string{}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.False(t, requestedPK)

	// if removePkField is true, pk field should be removed from output fields

	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{"*"}, schema, true)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, outputFields)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{idFieldName, tsFieldName}, schema, true)
	assert.Equal(t, nil, err)
	assert.ElementsMatch(t, []string{tsFieldName}, outputFields)
	assert.ElementsMatch(t, []string{tsFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{idFieldName, tsFieldName, floatVectorFieldName}, schema, true)
	assert.Equal(t, nil, err)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName}, outputFields)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{"*"}, schema, true)
	assert.Equal(t, nil, err)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, outputFields)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{"*", tsFieldName}, schema, true)
	assert.Equal(t, nil, err)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, outputFields)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{"*", floatVectorFieldName}, schema, true)
	assert.Equal(t, nil, err)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, outputFields)
	assert.ElementsMatch(t, []string{tsFieldName, floatVectorFieldName, binaryVectorFieldName, float16VectorFieldName, bfloat16VectorFieldName}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.True(t, requestedPK)

	// Test non-existent field, dynamic field not enabled
	_, _, _, _, _, err = translateOutputFields([]string{"A"}, schema, true)
	assert.Error(t, err)

	t.Run("enable dynamic schema", func(t *testing.T) {
		collSchema := &schemapb.CollectionSchema{
			Name:               "TestTranslateOutputFields",
			Description:        "TestTranslateOutputFields",
			AutoID:             false,
			EnableDynamicField: true,
			Fields: []*schemapb.FieldSchema{
				{Name: idFieldName, FieldID: 1, DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{Name: tsFieldName, FieldID: 2, DataType: schemapb.DataType_Int64},
				{Name: floatVectorFieldName, FieldID: 100, DataType: schemapb.DataType_FloatVector},
				{Name: binaryVectorFieldName, FieldID: 101, DataType: schemapb.DataType_BinaryVector},
				{Name: common.MetaFieldName, FieldID: 102, DataType: schemapb.DataType_JSON, IsDynamic: true},
			},
		}
		schema := newSchemaInfo(collSchema)

		outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{"A", idFieldName}, schema, true)
		assert.NoError(t, err)
		assert.ElementsMatch(t, []string{common.MetaFieldName}, outputFields)
		assert.ElementsMatch(t, []string{"A"}, userOutputFields)
		assert.ElementsMatch(t, []string{"A"}, userDynamicFields)
		assert.True(t, requestedPK)

		outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{"$meta[\"A\"]", idFieldName}, schema, true)
		assert.NoError(t, err)
		assert.ElementsMatch(t, []string{common.MetaFieldName}, outputFields)
		assert.ElementsMatch(t, []string{"$meta[\"A\"]"}, userOutputFields)
		assert.ElementsMatch(t, []string{"A"}, userDynamicFields)
		assert.True(t, requestedPK)

		// Test invalid dynamic field expressions
		_, _, _, _, _, err = translateOutputFields([]string{idFieldName, floatVectorFieldName, `$meta["A"]["B"]`}, schema, true)
		assert.Error(t, err)

		_, _, _, _, _, err = translateOutputFields([]string{idFieldName, floatVectorFieldName, "$meta[\"\"]"}, schema, true)
		assert.Error(t, err)

		_, _, _, _, _, err = translateOutputFields([]string{idFieldName, floatVectorFieldName, "$meta[]"}, schema, true)
		assert.Error(t, err)

		_, _, _, _, _, err = translateOutputFields([]string{idFieldName, floatVectorFieldName, "$meta["}, schema, true)
		assert.Error(t, err)

		_, _, _, _, _, err = translateOutputFields([]string{idFieldName, floatVectorFieldName, "[]"}, schema, true)
		assert.Error(t, err)

		_, _, _, _, _, err = translateOutputFields([]string{idFieldName, floatVectorFieldName, "A > 1"}, schema, true)
		assert.Error(t, err)

		_, _, _, _, _, err = translateOutputFields([]string{idFieldName, floatVectorFieldName, ""}, schema, true)
		assert.Error(t, err)
	})
}

func TestTranslateOutputFields_StructArrayField(t *testing.T) {
	const (
		idFieldName                = "id"
		tsFieldName                = "timestamp"
		floatVectorFieldName       = "float_vector"
		binaryVectorFieldName      = "binary_vector"
		float16VectorFieldName     = "float16_vector"
		bfloat16VectorFieldName    = "bfloat16_vector"
		sparseFloatVectorFieldName = "sparse_float_vector"
	)
	var outputFields []string
	var userOutputFields []string
	var userDynamicFields []string
	var requestedPK bool
	var err error

	collSchema := &schemapb.CollectionSchema{
		Name:        "TestTranslateOutputFields",
		Description: "TestTranslateOutputFields",
		AutoID:      false,
		Fields: []*schemapb.FieldSchema{
			{Name: idFieldName, FieldID: 0, DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
			{Name: tsFieldName, FieldID: 1, DataType: schemapb.DataType_Int64},
			{Name: floatVectorFieldName, FieldID: 100, DataType: schemapb.DataType_FloatVector},
		},
		StructArrayFields: []*schemapb.StructArrayFieldSchema{
			{
				FieldID: 101,
				Name:    "struct_array_field",
				Fields: []*schemapb.FieldSchema{
					{Name: "sub_field", FieldID: 102, DataType: schemapb.DataType_Array, ElementType: schemapb.DataType_Int64},
					{Name: "sub_vector_field", FieldID: 103, DataType: schemapb.DataType_ArrayOfVector, ElementType: schemapb.DataType_FloatVector},
				},
			},
		},
	}
	schema := newSchemaInfo(collSchema)

	// Test struct array field
	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{"sub_vector_field"}, schema, false)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{"sub_vector_field"}, outputFields)
	assert.ElementsMatch(t, []string{"sub_vector_field"}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.False(t, requestedPK)

	outputFields, userOutputFields, userDynamicFields, _, requestedPK, err = translateOutputFields([]string{"struct_array_field", "sub_field"}, schema, false)
	assert.NoError(t, err)
	assert.ElementsMatch(t, []string{"sub_vector_field", "sub_field"}, outputFields)
	assert.ElementsMatch(t, []string{"sub_vector_field", "sub_field"}, userOutputFields)
	assert.ElementsMatch(t, []string{}, userDynamicFields)
	assert.False(t, requestedPK)
}

func TestAddFieldTask(t *testing.T) {
	rc := NewMixCoordMock()
	ctx := context.Background()
	prefix := "TestAddFieldTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()
	collectionID := int64(1)
	int64Field := "int64"
	floatVecField := "fvec"
	varCharField := "varChar"

	rc.collName2ID[collectionName] = collectionID
	rc.collID2Meta[collectionID] = collectionMeta{
		name: collectionName,
		id:   collectionID,
		schema: &schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, DataType: schemapb.DataType_Int64, AutoID: true, Name: "ID"},
				{
					FieldID: 101, DataType: schemapb.DataType_FloatVector, Name: "vector",
					TypeParams: []*commonpb.KeyValuePair{
						{Key: "dim", Value: "128"},
					},
				},
			},
		},
	}
	fieldName2Type := make(map[string]schemapb.DataType)
	fieldName2Type[int64Field] = schemapb.DataType_Int64
	fieldName2Type[varCharField] = schemapb.DataType_VarChar
	fieldName2Type[floatVecField] = schemapb.DataType_FloatVector
	schema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, int64Field, false)

	fSchema := &schemapb.FieldSchema{
		Name:     "add",
		DataType: schemapb.DataType_Bool,
		Nullable: true,
	}
	bytes, err := proto.Marshal(fSchema)
	assert.NoError(t, err)
	task := &addCollectionFieldTask{
		Condition: NewTaskCondition(ctx),
		AddCollectionFieldRequest: &milvuspb.AddCollectionFieldRequest{
			Base:           nil,
			DbName:         dbName,
			CollectionName: collectionName,
			Schema:         bytes,
		},
		ctx:       ctx,
		mixCoord:  rc,
		result:    nil,
		oldSchema: schema,
	}

	t.Run("on enqueue", func(t *testing.T) {
		err := task.OnEnqueue()
		assert.NoError(t, err)
		assert.Equal(t, commonpb.MsgType_AddCollectionField, task.Type())
	})

	t.Run("ctx", func(t *testing.T) {
		traceCtx := task.TraceCtx()
		assert.NotNil(t, traceCtx)
	})

	t.Run("id", func(t *testing.T) {
		id := UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt())
		task.SetID(id)
		assert.Equal(t, id, task.ID())
	})

	t.Run("name", func(t *testing.T) {
		assert.Equal(t, AddFieldTaskName, task.Name())
	})

	t.Run("ts", func(t *testing.T) {
		ts := Timestamp(time.Now().UnixNano())
		task.SetTs(ts)
		assert.Equal(t, ts, task.BeginTs())
		assert.Equal(t, ts, task.EndTs())
	})

	t.Run("process task", func(t *testing.T) {
		var err error
		// nil collection schema
		task.oldSchema = nil
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		bytes, err := proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes

		task.oldSchema = schema

		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		err = task.Execute(ctx)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, task.result.ErrorCode)

		err = task.PostExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("PreExecute", func(t *testing.T) {
		var err error

		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		// nil schema
		task.Schema = nil
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		// too many fields
		Params.Save(Params.ProxyCfg.MaxFieldNum.Key, fmt.Sprint(task.oldSchema.Fields))
		fSchema := &schemapb.FieldSchema{
			Name: "add_field",
		}
		bytes, err := proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		Params.Reset(Params.ProxyCfg.MaxFieldNum.Key)

		// invalid field type
		fSchema = &schemapb.FieldSchema{
			DataType: schemapb.DataType_None,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		fSchema = &schemapb.FieldSchema{
			Name:     "vec_field",
			DataType: schemapb.DataType_FloatVector,
			Nullable: true,
			TypeParams: []*commonpb.KeyValuePair{
				{Key: "dim", Value: "128"},
			},
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		paramtable.Get().Save(paramtable.Get().CommonCfg.UseLoonFFI.Key, "true")
		t.Cleanup(func() {
			paramtable.Get().Reset(paramtable.Get().CommonCfg.UseLoonFFI.Key)
		})
		fSchema = &schemapb.FieldSchema{
			Name:     "text_field",
			DataType: schemapb.DataType_Text,
			Nullable: true,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		fSchema = &schemapb.FieldSchema{
			Name:     "text_not_nullable",
			DataType: schemapb.DataType_Text,
			Nullable: false,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.Contains(t, err.Error(), "added field must be nullable")

		fSchema = &schemapb.FieldSchema{
			Name:     "text_default",
			DataType: schemapb.DataType_Text,
			Nullable: true,
			DefaultValue: &schemapb.ValueField{
				Data: &schemapb.ValueField_StringData{StringData: "default text"},
			},
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.Contains(t, err.Error(), "default value is not supported when adding TEXT field")

		fSchema = &schemapb.FieldSchema{
			Name:     "sparse_vec",
			DataType: schemapb.DataType_SparseFloatVector,
			Nullable: true,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		fSchema = &schemapb.FieldSchema{
			Name:        "array_struct",
			DataType:    schemapb.DataType_Array,
			ElementType: schemapb.DataType_Struct,
			Nullable:    true,
			TypeParams: []*commonpb.KeyValuePair{
				{Key: common.MaxCapacityKey, Value: "4"},
			},
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "element type Struct is not supported")

		// not support system field
		fSchema = &schemapb.FieldSchema{
			Name: common.TimeStampFieldName,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		// must be nullable
		fSchema = &schemapb.FieldSchema{
			Nullable: false,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		// not support pk field
		fSchema = &schemapb.FieldSchema{
			IsPrimaryKey: true,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		// not support add partition key
		fSchema = &schemapb.FieldSchema{
			IsPartitionKey: true,
			DataType:       schemapb.DataType_Bool,
			Nullable:       true,
			Name:           "new field",
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		Params.Save(Params.ProxyCfg.MustUsePartitionKey.Key, "true")
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		Params.Reset(Params.ProxyCfg.MustUsePartitionKey.Key)

		// not support autoID
		fSchema = &schemapb.FieldSchema{
			AutoID: true,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		// more ClusteringKey field — use a valid type so the duplicate-key check is the gate
		fSchema = &schemapb.FieldSchema{
			Name:            "ck_field",
			DataType:        schemapb.DataType_Int64,
			Nullable:        true,
			IsClusteringKey: true,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		task.oldSchema = schema
		task.oldSchema.Fields = append(task.oldSchema.Fields, &schemapb.FieldSchema{
			IsClusteringKey: true,
		})
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		// unsupported clustering key type (JSON, Bool, Array)
		// Use a fresh schema (no existing clustering key) so the type check is the only gate
		freshSchema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, int64Field, false)
		task.oldSchema = freshSchema
		for _, unsupportedType := range []schemapb.DataType{
			schemapb.DataType_JSON,
			schemapb.DataType_Bool,
			schemapb.DataType_Array,
		} {
			fSchema = &schemapb.FieldSchema{
				Name:            "ck_field",
				DataType:        unsupportedType,
				Nullable:        true,
				IsClusteringKey: true,
			}
			if unsupportedType == schemapb.DataType_Array {
				fSchema.ElementType = schemapb.DataType_Int64
			}
			bytes, err = proto.Marshal(fSchema)
			assert.NoError(t, err)
			task.Schema = bytes
			err = task.PreExecute(ctx)
			assert.Error(t, err, "expected error for unsupported clustering key type %v", unsupportedType)
			assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		}

		// valid clustering key type (Int64) should be accepted
		fSchema = &schemapb.FieldSchema{
			Name:            "valid_ck",
			DataType:        schemapb.DataType_Int64,
			Nullable:        true,
			IsClusteringKey: true,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		task.oldSchema = freshSchema // no existing clustering key
		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		// fieldName invalid
		fSchema = &schemapb.FieldSchema{
			Name: "",
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		// duplicated FieldName
		fSchema = &schemapb.FieldSchema{
			Name: varCharField,
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		oldSchemaWithVectors := constructCollectionSchemaByDataType(collectionName, fieldName2Type, int64Field, false)
		for i := 0; i < Params.ProxyCfg.MaxVectorFieldNum.GetAsInt(); i++ {
			oldSchemaWithVectors.Fields = append(oldSchemaWithVectors.Fields, &schemapb.FieldSchema{
				Name:     fmt.Sprintf("vec_%d", i),
				DataType: schemapb.DataType_FloatVector,
				TypeParams: []*commonpb.KeyValuePair{
					{Key: "dim", Value: "128"},
				},
			})
		}
		task.oldSchema = oldSchemaWithVectors
		fSchema = &schemapb.FieldSchema{
			Name:     "new_vec_field",
			DataType: schemapb.DataType_FloatVector,
			Nullable: true,
			TypeParams: []*commonpb.KeyValuePair{
				{Key: "dim", Value: "128"},
			},
		}
		bytes, err = proto.Marshal(fSchema)
		assert.NoError(t, err)
		task.Schema = bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "maximum vector field's number should be limited to")
	})
}

func TestAddCollectionStructFieldTaskPreExecute(t *testing.T) {
	ctx := context.Background()
	oldSchema := &schemapb.CollectionSchema{
		Name: "test_collection",
		Fields: []*schemapb.FieldSchema{
			{
				FieldID:      100,
				Name:         "pk",
				DataType:     schemapb.DataType_Int64,
				IsPrimaryKey: true,
			},
		},
	}
	structField := newAddStructFieldSchema("profile")

	task := &addCollectionStructFieldTask{
		Condition: NewTaskCondition(ctx),
		AddCollectionStructFieldRequest: &milvuspb.AddCollectionStructFieldRequest{
			DbName:                 "",
			CollectionName:         oldSchema.GetName(),
			StructArrayFieldSchema: structField,
		},
		ctx:       ctx,
		mixCoord:  NewMixCoordMock(),
		oldSchema: oldSchema,
	}

	require.NoError(t, task.OnEnqueue())
	assert.Equal(t, commonpb.MsgType_AddCollectionField, task.Type())

	require.NoError(t, task.PreExecute(ctx))

	got := task.GetStructArrayFieldSchema()
	require.NotSame(t, structField, got)
	require.Len(t, got.GetFields(), 2)
	assert.Equal(t, "profile[ints]", got.GetFields()[0].GetName())
	assert.Equal(t, "profile[vectors]", got.GetFields()[1].GetName())
	assert.True(t, got.GetFields()[0].GetNullable())
	assert.True(t, got.GetFields()[1].GetNullable())

	// PreExecute works on a cloned schema, so callers do not observe partial mutation on failure.
	assert.Equal(t, "ints", structField.GetFields()[0].GetName())
	assert.Equal(t, "vectors", structField.GetFields()[1].GetName())
}

func TestValidateAddStructFieldRequest(t *testing.T) {
	baseSchema := &schemapb.CollectionSchema{
		Name: "test_collection",
		Fields: []*schemapb.FieldSchema{
			{
				Name:     "pk",
				DataType: schemapb.DataType_Int64,
			},
		},
	}

	t.Run("valid", func(t *testing.T) {
		err := validateAddStructFieldRequest(proto.Clone(baseSchema).(*schemapb.CollectionSchema), newAddStructFieldSchema("profile"))
		require.NoError(t, err)
	})

	t.Run("struct must be nullable", func(t *testing.T) {
		structField := newAddStructFieldSchema("profile")
		structField.Nullable = false

		err := validateAddStructFieldRequest(proto.Clone(baseSchema).(*schemapb.CollectionSchema), structField)
		require.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.Contains(t, err.Error(), "added struct field must be nullable")
	})

	t.Run("duplicate parent name", func(t *testing.T) {
		err := validateAddStructFieldRequest(proto.Clone(baseSchema).(*schemapb.CollectionSchema), newAddStructFieldSchema("pk"))
		require.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.Contains(t, err.Error(), "duplicated field name pk")
	})

	t.Run("duplicate transformed sub field name", func(t *testing.T) {
		schema := proto.Clone(baseSchema).(*schemapb.CollectionSchema)
		schema.Fields = append(schema.Fields, &schemapb.FieldSchema{
			Name:     "profile[ints]",
			DataType: schemapb.DataType_Int64,
		})

		err := validateAddStructFieldRequest(schema, newAddStructFieldSchema("profile"))
		require.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.Contains(t, err.Error(), "duplicated field name profile[ints]")
	})

	t.Run("max field count includes struct parent", func(t *testing.T) {
		Params.Save(Params.ProxyCfg.MaxFieldNum.Key, "3")
		defer Params.Reset(Params.ProxyCfg.MaxFieldNum.Key)

		err := validateAddStructFieldRequest(proto.Clone(baseSchema).(*schemapb.CollectionSchema), newAddStructFieldSchema("profile"))
		require.Error(t, err)
		assert.Contains(t, err.Error(), "maximum field's number should be limited to 3")
	})

	t.Run("vector count includes array of vector sub field", func(t *testing.T) {
		Params.Save(Params.ProxyCfg.MaxVectorFieldNum.Key, "0")
		defer Params.Reset(Params.ProxyCfg.MaxVectorFieldNum.Key)

		err := validateAddStructFieldRequest(proto.Clone(baseSchema).(*schemapb.CollectionSchema), newAddStructFieldSchema("profile"))
		require.Error(t, err)
		assert.Contains(t, err.Error(), "maximum vector field's number should be limited to 0")
	})
}

func newAddStructFieldSchema(name string) *schemapb.StructArrayFieldSchema {
	return &schemapb.StructArrayFieldSchema{
		Name:     name,
		Nullable: true,
		Fields: []*schemapb.FieldSchema{
			{
				Name:        "ints",
				DataType:    schemapb.DataType_Array,
				ElementType: schemapb.DataType_Int64,
				TypeParams: []*commonpb.KeyValuePair{
					{Key: common.MaxCapacityKey, Value: "16"},
				},
			},
			{
				Name:        "vectors",
				DataType:    schemapb.DataType_ArrayOfVector,
				ElementType: schemapb.DataType_FloatVector,
				TypeParams: []*commonpb.KeyValuePair{
					{Key: common.DimKey, Value: "8"},
					{Key: common.MaxCapacityKey, Value: "16"},
				},
			},
		},
	}
}

func TestCreateCollectionTask(t *testing.T) {
	mix := NewMixCoordMock()
	ctx := context.Background()
	shardsNum := common.DefaultShardsNum
	prefix := "TestCreateCollectionTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()
	int64Field := "int64"
	floatVecField := "fvec"
	varCharField := "varChar"

	fieldName2Type := make(map[string]schemapb.DataType)
	fieldName2Type[int64Field] = schemapb.DataType_Int64
	fieldName2Type[varCharField] = schemapb.DataType_VarChar
	fieldName2Type[floatVecField] = schemapb.DataType_FloatVector
	schema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, int64Field, false)
	var marshaledSchema []byte
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	task := &createCollectionTask{
		Condition: NewTaskCondition(ctx),
		CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
			Base:           nil,
			DbName:         dbName,
			CollectionName: collectionName,
			Schema:         marshaledSchema,
			ShardsNum:      shardsNum,
		},
		ctx:      ctx,
		mixCoord: mix,
		result:   nil,
		schema:   nil,
	}

	t.Run("on enqueue", func(t *testing.T) {
		err := task.OnEnqueue()
		assert.NoError(t, err)
		assert.Equal(t, commonpb.MsgType_CreateCollection, task.Type())
	})

	t.Run("ctx", func(t *testing.T) {
		traceCtx := task.TraceCtx()
		assert.NotNil(t, traceCtx)
	})

	t.Run("id", func(t *testing.T) {
		id := UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt())
		task.SetID(id)
		assert.Equal(t, id, task.ID())
	})

	t.Run("name", func(t *testing.T) {
		assert.Equal(t, CreateCollectionTaskName, task.Name())
	})

	t.Run("ts", func(t *testing.T) {
		ts := Timestamp(time.Now().UnixNano())
		task.SetTs(ts)
		assert.Equal(t, ts, task.BeginTs())
		assert.Equal(t, ts, task.EndTs())
	})

	t.Run("process task", func(t *testing.T) {
		var err error

		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		err = task.Execute(ctx)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, task.result.ErrorCode)

		// recreate -> fail
		err = task.Execute(ctx)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, task.result.ErrorCode)

		err = task.PostExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("PreExecute", func(t *testing.T) {
		var err error

		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		Params.Save(Params.ProxyCfg.MustUsePartitionKey.Key, "true")
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterMissing)
		Params.Reset(Params.ProxyCfg.MustUsePartitionKey.Key)

		task.Schema = []byte{0x1, 0x2, 0x3, 0x4}
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		task.Schema = marshaledSchema

		task.ShardsNum = Params.ProxyCfg.MaxShardNum.GetAsInt32() + 1
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		task.ShardsNum = shardsNum

		reqBackup := proto.Clone(task.CreateCollectionRequest).(*milvuspb.CreateCollectionRequest)
		schemaBackup := proto.Clone(schema).(*schemapb.CollectionSchema)

		schemaWithTooManyFields := &schemapb.CollectionSchema{
			Name:        collectionName,
			Description: "",
			AutoID:      false,
			Fields:      make([]*schemapb.FieldSchema, Params.ProxyCfg.MaxFieldNum.GetAsInt32()+1),
		}
		marshaledSchemaWithTooManyFields, err := proto.Marshal(schemaWithTooManyFields)
		assert.NoError(t, err)
		task.Schema = marshaledSchemaWithTooManyFields
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		// too many vector fields
		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		schema.Fields = append(schema.Fields, schema.Fields[0])
		for i := 0; i < Params.ProxyCfg.MaxVectorFieldNum.GetAsInt(); i++ {
			schema.Fields = append(schema.Fields, &schemapb.FieldSchema{
				FieldID:      101,
				Name:         floatVecField + "_" + strconv.Itoa(i),
				IsPrimaryKey: false,
				Description:  "",
				DataType:     schemapb.DataType_FloatVector,
				TypeParams: []*commonpb.KeyValuePair{
					{
						Key:   common.DimKey,
						Value: strconv.Itoa(testVecDim),
					},
				},
				IndexParams: nil,
				AutoID:      false,
			})
		}
		tooManyVectorFieldsSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = tooManyVectorFieldsSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		// without vector field
		schema = &schemapb.CollectionSchema{
			Name:        collectionName,
			Description: "",
			AutoID:      false,
			Fields: []*schemapb.FieldSchema{
				{
					Name:         "id",
					DataType:     schemapb.DataType_Int64,
					IsPrimaryKey: true,
				},
			},
		}
		noVectorSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = noVectorSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		task.CreateCollectionRequest = reqBackup

		// validateCollectionName
		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		schema.Name = " " // empty
		emptyNameSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = emptyNameSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		schema.Name = prefix
		for i := 0; i < Params.ProxyCfg.MaxNameLength.GetAsInt(); i++ {
			schema.Name += strconv.Itoa(i % 10)
		}
		tooLongNameSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = tooLongNameSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		schema.Description = strings.Repeat("a", Params.ProxyCfg.MaxCollectionDescriptionLength.GetAsInt()+1)
		tooLongDescriptionSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = tooLongDescriptionSchema
		err = task.PreExecute(ctx)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		schema.Name = "$" // invalid first char
		invalidFirstCharSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = invalidFirstCharSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		// validateDuplicatedFieldName
		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		schema.Fields = append(schema.Fields, schema.Fields[0])
		duplicatedFieldsSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = duplicatedFieldsSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		// validatePrimaryKey
		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		for idx := range schema.Fields {
			schema.Fields[idx].IsPrimaryKey = false
		}
		noPrimaryFieldsSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = noPrimaryFieldsSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		// validateFieldName
		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		for idx := range schema.Fields {
			schema.Fields[idx].Name = "$"
		}
		invalidFieldNameSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = invalidFieldNameSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		// validateMaxLengthPerRow
		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		for idx := range schema.Fields {
			if schema.Fields[idx].DataType == schemapb.DataType_VarChar {
				schema.Fields[idx].TypeParams = nil
			}
		}
		noTypeParamsSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = noTypeParamsSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		// ValidateVectorField
		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		for idx := range schema.Fields {
			if schema.Fields[idx].DataType == schemapb.DataType_FloatVector ||
				schema.Fields[idx].DataType == schemapb.DataType_BinaryVector {
				schema.Fields[idx].TypeParams = nil
			}
		}
		noDimSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = noDimSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		// ValidateVectorField
		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		for _, field := range schema.Fields {
			field.TypeParams = append(field.TypeParams, &commonpb.KeyValuePair{
				Key:   common.FieldSkipLoadKey,
				Value: "true",
			})
		}

		// Validate default load list
		skipLoadSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = skipLoadSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		for idx := range schema.Fields {
			if schema.Fields[idx].DataType == schemapb.DataType_FloatVector ||
				schema.Fields[idx].DataType == schemapb.DataType_BinaryVector {
				schema.Fields[idx].TypeParams = []*commonpb.KeyValuePair{
					{
						Key:   common.DimKey,
						Value: "not int",
					},
				}
			}
		}
		dimNotIntSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = dimNotIntSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		for idx := range schema.Fields {
			if schema.Fields[idx].DataType == schemapb.DataType_FloatVector ||
				schema.Fields[idx].DataType == schemapb.DataType_BinaryVector {
				schema.Fields[idx].TypeParams = []*commonpb.KeyValuePair{
					{
						Key:   common.DimKey,
						Value: strconv.Itoa(Params.ProxyCfg.MaxDimension.GetAsInt() + 1),
					},
				}
			}
		}
		tooLargeDimSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = tooLargeDimSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		schema.Fields[1].DataType = schemapb.DataType_BinaryVector
		schema.Fields[1].TypeParams = []*commonpb.KeyValuePair{
			{
				Key:   common.DimKey,
				Value: strconv.Itoa(Params.ProxyCfg.MaxDimension.GetAsInt() + 1),
			},
		}
		binaryTooLargeDimSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = binaryTooLargeDimSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		schema = proto.Clone(schemaBackup).(*schemapb.CollectionSchema)
		lastFieldID := schema.Fields[len(schema.Fields)-1].FieldID
		schema.Fields = append(schema.Fields, &schemapb.FieldSchema{
			FieldID:      lastFieldID + 1,
			Name:         "second_vector",
			IsPrimaryKey: false,
			Description:  "",
			DataType:     schemapb.DataType_FloatVector,
			TypeParams: []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: strconv.Itoa(128),
				},
			},
			IndexParams: nil,
			AutoID:      false,
		})
		twoVecFieldsSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = twoVecFieldsSchema
		err = task.PreExecute(ctx)
		if enableMultipleVectorFields {
			assert.NoError(t, err)
		} else {
			assert.Error(t, err)
		}

		task.CreateCollectionRequest = reqBackup

		// Test StructArrayField validation
		structArrayFieldSchema := constructCollectionSchemaWithStructArrayField(collectionName+"_struct", testStructArrayField, false)

		// Test valid StructArrayField
		validStructSchema, err := proto.Marshal(structArrayFieldSchema)
		assert.NoError(t, err)
		task.Schema = validStructSchema
		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		// Test invalid StructArrayField - empty fields
		invalidStructSchema := proto.Clone(structArrayFieldSchema).(*schemapb.CollectionSchema)
		invalidStructSchema.StructArrayFields[0].Fields = []*schemapb.FieldSchema{} // Empty fields
		invalidStructSchemaBytes, err := proto.Marshal(invalidStructSchema)
		assert.NoError(t, err)
		task.Schema = invalidStructSchemaBytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		// Test invalid StructArrayField - invalid field name
		invalidStructSchema2 := proto.Clone(structArrayFieldSchema).(*schemapb.CollectionSchema)
		invalidStructSchema2.StructArrayFields[0].Fields[0].Name = "$invalid" // Invalid field name
		invalidStructSchema2Bytes, err := proto.Marshal(invalidStructSchema2)
		assert.NoError(t, err)
		task.Schema = invalidStructSchema2Bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		// Test invalid StructArrayField - non-array/non-vector-array sub-field
		invalidStructSchema3 := proto.Clone(structArrayFieldSchema).(*schemapb.CollectionSchema)
		invalidStructSchema3.StructArrayFields[0].Fields[0].DataType = schemapb.DataType_Int64 // Should be Array or ArrayOfVector
		invalidStructSchema3Bytes, err := proto.Marshal(invalidStructSchema3)
		assert.NoError(t, err)
		task.Schema = invalidStructSchema3Bytes
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		ttlFieldSchema := constructCollectionSchemaWithTTLField(collectionName+"_ttl", testTTLField)

		// Test invalid ttl field - ttl field not found
		ttlFieldSchemaBytes, err := proto.Marshal(ttlFieldSchema)
		assert.NoError(t, err)
		task.Properties = make([]*commonpb.KeyValuePair, 0)
		task.Schema = ttlFieldSchemaBytes
		task.Properties = append(task.Properties, &commonpb.KeyValuePair{
			Key:   common.CollectionTTLFieldKey,
			Value: "invalid",
		})
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		// Test invalid ttl field - exist with collection ttl
		task.Properties = make([]*commonpb.KeyValuePair, 0)
		task.Properties = append(task.Properties, &commonpb.KeyValuePair{
			Key:   common.CollectionTTLFieldKey,
			Value: testTTLField,
		})
		task.Properties = append(task.Properties, &commonpb.KeyValuePair{
			Key:   common.CollectionTTLConfigKey,
			Value: "100",
		})
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		// Test invalid ttl field - ttl field is not timestamptz
		task.Properties = make([]*commonpb.KeyValuePair, 0)
		task.Properties = append(task.Properties, &commonpb.KeyValuePair{
			Key:   common.CollectionTTLFieldKey,
			Value: "pk",
		})
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)

		// Restore original schema for remaining tests
		task.CreateCollectionRequest = reqBackup
	})

	t.Run("specify dynamic field", func(t *testing.T) {
		dynamicField := &schemapb.FieldSchema{
			Name:      "json",
			IsDynamic: true,
		}
		var marshaledSchema []byte
		schema2 := &schemapb.CollectionSchema{
			Name:   collectionName,
			Fields: append(schema.Fields, dynamicField),
		}
		marshaledSchema, err := proto.Marshal(schema2)
		assert.NoError(t, err)

		task2 := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base:           nil,
				DbName:         dbName,
				CollectionName: collectionName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: mix,
			result:   nil,
			schema:   nil,
		}

		err = task2.OnEnqueue()
		assert.NoError(t, err)

		err = task2.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("collection with embedding function ", func(t *testing.T) {
		paramtable.Init()
		paramtable.Get().CredentialCfg.Credential.GetFunc = func() map[string]string {
			return map[string]string{
				"mock.apikey": "mock",
			}
		}
		ts := embedding.CreateOpenAIEmbeddingServer()
		defer ts.Close()
		paramtable.Get().FunctionCfg.TextEmbeddingProviders.GetFunc = func() map[string]string {
			return map[string]string{
				"openai.url": ts.URL,
			}
		}
		schema.Functions = []*schemapb.FunctionSchema{
			{
				Name:             "test",
				Type:             schemapb.FunctionType_TextEmbedding,
				InputFieldNames:  []string{varCharField},
				OutputFieldNames: []string{floatVecField},
				Params: []*commonpb.KeyValuePair{
					{Key: "provider", Value: "openai"},
					{Key: "model_name", Value: "text-embedding-ada-002"},
					{Key: "credential", Value: "mock"},
					{Key: "dim", Value: "128"},
				},
			},
		}

		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		task2 := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base:           nil,
				DbName:         dbName,
				CollectionName: collectionName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: mix,
			result:   nil,
			schema:   nil,
		}

		err = task2.OnEnqueue()
		assert.NoError(t, err)

		err = task2.PreExecute(ctx)
		assert.NoError(t, err)
	})
}

func TestCreateCollectionTaskExternalCollection(t *testing.T) {
	mix := NewMixCoordMock()
	ctx := context.Background()
	collectionName := "external_collection_" + funcutil.GenRandomStr()

	buildExternalSchema := func() *schemapb.CollectionSchema {
		return &schemapb.CollectionSchema{
			Name:           collectionName,
			ExternalSource: "s3://bucket/prefix",
			ExternalSpec:   `{"format":"parquet"}`,
			Fields: []*schemapb.FieldSchema{
				{
					FieldID:       1,
					Name:          "text_field",
					DataType:      schemapb.DataType_VarChar,
					ExternalField: "text_col",
					TypeParams: []*commonpb.KeyValuePair{
						{Key: common.MaxLengthKey, Value: "64"},
					},
				},
				{
					FieldID:       2,
					Name:          "vec_field",
					DataType:      schemapb.DataType_FloatVector,
					ExternalField: "vec_col",
					TypeParams: []*commonpb.KeyValuePair{
						{Key: common.DimKey, Value: "16"},
					},
				},
			},
		}
	}

	marshal := func(schema *schemapb.CollectionSchema) []byte {
		bytes, err := proto.Marshal(schema)
		require.NoError(t, err)
		return bytes
	}

	task := &createCollectionTask{
		Condition: NewTaskCondition(ctx),
		CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
			CollectionName: collectionName,
			Schema:         marshal(buildExternalSchema()),
			ShardsNum:      common.DefaultShardsNum,
		},
		ctx:      ctx,
		mixCoord: mix,
	}

	t.Run("valid external schema", func(t *testing.T) {
		err := task.OnEnqueue()
		require.NoError(t, err)
		err = task.PreExecute(ctx)
		require.NoError(t, err)
	})

	t.Run("source spec without external field rejected", func(t *testing.T) {
		schema := buildExternalSchema()
		for _, field := range schema.GetFields() {
			field.ExternalField = ""
		}
		freshTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				CollectionName: collectionName,
				Schema:         marshal(schema),
				ShardsNum:      common.DefaultShardsNum,
			},
			ctx:      ctx,
			mixCoord: mix,
		}
		err := freshTask.OnEnqueue()
		require.NoError(t, err)
		err = freshTask.PreExecute(ctx)
		require.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.Contains(t, err.Error(), "external_field mappings")
	})

	t.Run("virtual PK injected after PreExecute", func(t *testing.T) {
		schema := buildExternalSchema()
		freshTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				CollectionName: collectionName,
				Schema:         marshal(schema),
				ShardsNum:      common.DefaultShardsNum,
			},
			ctx:      ctx,
			mixCoord: mix,
		}
		err := freshTask.OnEnqueue()
		require.NoError(t, err)
		err = freshTask.PreExecute(ctx)
		require.NoError(t, err)

		// After PreExecute, schema should have virtual PK prepended
		assert.Equal(t, common.VirtualPKFieldName, freshTask.schema.Fields[0].Name)
		assert.True(t, freshTask.schema.Fields[0].IsPrimaryKey)
		assert.True(t, freshTask.schema.Fields[0].AutoID)
		assert.Equal(t, schemapb.DataType_Int64, freshTask.schema.Fields[0].DataType)
		// Original fields should follow
		assert.Equal(t, "text_field", freshTask.schema.Fields[1].Name)
		assert.Equal(t, "vec_field", freshTask.schema.Fields[2].Name)
	})

	t.Run("dynamic field forbidden", func(t *testing.T) {
		schema := buildExternalSchema()
		schema.EnableDynamicField = true
		task.Schema = marshal(schema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("partition key forbidden", func(t *testing.T) {
		schema := buildExternalSchema()
		schema.Fields[0].IsPartitionKey = true
		task.Schema = marshal(schema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("clustering key forbidden", func(t *testing.T) {
		schema := buildExternalSchema()
		schema.Fields[0].IsClusteringKey = true
		task.Schema = marshal(schema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("auto id forbidden", func(t *testing.T) {
		schema := buildExternalSchema()
		schema.Fields[0].AutoID = true
		task.Schema = marshal(schema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("text match allowed", func(t *testing.T) {
		schema := buildExternalSchema()
		schema.Fields[0].TypeParams = append(schema.Fields[0].TypeParams,
			&commonpb.KeyValuePair{
				Key:   "enable_match",
				Value: "true",
			},
			&commonpb.KeyValuePair{
				Key:   common.EnableAnalyzerKey,
				Value: "true",
			})
		task.Schema = marshal(schema)
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("struct field forbidden", func(t *testing.T) {
		schema := buildExternalSchema()
		schema.StructArrayFields = []*schemapb.StructArrayFieldSchema{
			{
				FieldID: 3,
				Name:    "struct_array_field",
				Fields: []*schemapb.FieldSchema{
					{
						FieldID:     4,
						Name:        "nested_array",
						DataType:    schemapb.DataType_Array,
						ElementType: schemapb.DataType_Int64,
						TypeParams: []*commonpb.KeyValuePair{
							{Key: common.MaxCapacityKey, Value: "10"},
						},
					},
				},
			},
		}
		task.Schema = marshal(schema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
	})
}

func TestHasCollectionTask(t *testing.T) {
	mixc := NewMixCoordMock()
	defer mixc.Close()
	ctx := context.Background()
	InitMetaCache(ctx, mixc)
	prefix := "TestHasCollectionTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()

	shardsNum := int32(2)
	int64Field := "int64"
	floatVecField := "fvec"
	dim := 128

	schema := constructCollectionSchema(int64Field, floatVecField, dim, collectionName)
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	createColReq := &milvuspb.CreateCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_DropCollection,
			MsgID:     100,
			Timestamp: 100,
		},
		DbName:         dbName,
		CollectionName: collectionName,
		Schema:         marshaledSchema,
		ShardsNum:      shardsNum,
	}

	// CreateCollection
	task := &hasCollectionTask{
		Condition: NewTaskCondition(ctx),
		HasCollectionRequest: &milvuspb.HasCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_HasCollection,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: collectionName,
		},
		ctx:      ctx,
		mixCoord: mixc,
		result:   nil,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_HasCollection, task.Type())
	assert.Equal(t, UniqueID(100), task.ID())
	assert.Equal(t, Timestamp(100), task.BeginTs())
	assert.Equal(t, Timestamp(100), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.GetBase().GetSourceID())
	// missing collectionID in globalMetaCache
	err = task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, false, task.result.Value)
	// createIsoCollection in RootCood and fill GlobalMetaCache
	mixc.CreateCollection(ctx, createColReq)
	globalMetaCache.GetCollectionID(ctx, GetCurDBNameFromContextOrDefault(ctx), collectionName)

	// success to drop collection
	err = task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, true, task.result.Value)

	// illegal name
	task.CollectionName = "#0xc0de"
	err = task.PreExecute(ctx)
	assert.Error(t, err)

	task.CollectionName = collectionName

	// invalidate collection cache, trigger rootcoord rpc
	globalMetaCache.RemoveCollection(ctx, dbName, collectionName, 0)

	// rc return collection not found error
	mixc.describeCollectionFunc = func(ctx context.Context, request *milvuspb.DescribeCollectionRequest) (*milvuspb.DescribeCollectionResponse, error) {
		return nil, merr.WrapErrCollectionNotFoundWithDB(dbName, collectionName)
	}
	err = task.PreExecute(ctx)
	assert.NoError(t, err)
	err = task.Execute(ctx)
	assert.NoError(t, err)
	assert.False(t, task.result.GetValue())
	assert.NotNil(t, task.result.GetStatus())

	// rootcoord failed to get response
	mixc.updateState(commonpb.StateCode_Abnormal)
	err = task.PreExecute(ctx)
	assert.NoError(t, err)
	err = task.Execute(ctx)
	assert.Error(t, err)
}

func TestDescribeCollectionTask(t *testing.T) {
	mixc := NewMixCoordMock()
	defer mixc.Close()
	ctx := context.Background()
	InitMetaCache(ctx, mixc)
	prefix := "TestDescribeCollectionTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()

	// CreateCollection
	task := &describeCollectionTask{
		Condition: NewTaskCondition(ctx),
		DescribeCollectionRequest: &milvuspb.DescribeCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_DescribeCollection,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: collectionName,
		},
		ctx:      ctx,
		mixCoord: mixc,
		result:   nil,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_DescribeCollection, task.Type())
	assert.Equal(t, UniqueID(100), task.ID())
	assert.Equal(t, Timestamp(100), task.BeginTs())
	assert.Equal(t, Timestamp(100), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.GetBase().GetSourceID())
	// missing collectionID in globalMetaCache
	err := task.Execute(ctx)
	assert.NoError(t, err)

	// illegal name
	task.CollectionName = "#0xc0de"
	err = task.PreExecute(ctx)
	assert.Error(t, err)

	// describe collection with id
	task.CollectionID = 1
	task.CollectionName = ""
	err = task.PreExecute(ctx)
	assert.NoError(t, err)

	task.CollectionID = 0
	task.CollectionName = collectionName
	err = task.PreExecute(ctx)
	assert.NoError(t, err)
	err = task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_UnexpectedError, task.result.GetStatus().GetErrorCode())
}

func TestDescribeCollectionTask_ShardsNum1(t *testing.T) {
	mix := NewMixCoordMock()

	ctx := context.Background()
	InitMetaCache(ctx, mix)
	prefix := "TestDescribeCollectionTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()

	shardsNum := common.DefaultShardsNum
	int64Field := "int64"
	floatVecField := "fvec"
	dim := 128

	schema := constructCollectionSchema(int64Field, floatVecField, dim, collectionName)
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	createColReq := &milvuspb.CreateCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_DropCollection,
			MsgID:     100,
			Timestamp: 100,
		},
		DbName:         dbName,
		CollectionName: collectionName,
		Schema:         marshaledSchema,
		ShardsNum:      shardsNum,
	}

	mix.CreateCollection(ctx, createColReq)
	globalMetaCache.GetCollectionID(ctx, GetCurDBNameFromContextOrDefault(ctx), collectionName)

	// CreateCollection
	task := &describeCollectionTask{
		Condition: NewTaskCondition(ctx),
		DescribeCollectionRequest: &milvuspb.DescribeCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_DescribeCollection,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: collectionName,
		},
		ctx:      ctx,
		mixCoord: mix,
		result:   nil,
	}
	err = task.PreExecute(ctx)
	assert.NoError(t, err)

	err = task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, task.result.GetStatus().GetErrorCode())
	assert.Equal(t, shardsNum, task.result.ShardsNum)
	assert.Equal(t, collectionName, task.result.GetCollectionName())
}

func TestDescribeCollectionTask_EnableDynamicSchema(t *testing.T) {
	mix := NewMixCoordMock()
	ctx := context.Background()
	InitMetaCache(ctx, mix)
	prefix := "TestDescribeCollectionTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()

	shardsNum := common.DefaultShardsNum
	int64Field := "int64"
	floatVecField := "fvec"
	dim := 128

	schema := constructCollectionSchemaEnableDynamicSchema(int64Field, floatVecField, dim, collectionName)
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	createColReq := &milvuspb.CreateCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_DropCollection,
			MsgID:     100,
			Timestamp: 100,
		},
		DbName:         dbName,
		CollectionName: collectionName,
		Schema:         marshaledSchema,
		ShardsNum:      shardsNum,
	}

	mix.CreateCollection(ctx, createColReq)
	globalMetaCache.GetCollectionID(ctx, dbName, collectionName)

	// CreateCollection
	task := &describeCollectionTask{
		Condition: NewTaskCondition(ctx),
		DescribeCollectionRequest: &milvuspb.DescribeCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_DescribeCollection,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: collectionName,
		},
		ctx:      ctx,
		mixCoord: mix,
		result:   nil,
	}
	err = task.PreExecute(ctx)
	assert.NoError(t, err)

	err = task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, task.result.GetStatus().GetErrorCode())
	assert.Equal(t, shardsNum, task.result.ShardsNum)
	assert.Equal(t, collectionName, task.result.GetCollectionName())
	assert.Equal(t, 2, len(task.result.Schema.Fields))
}

func TestDescribeCollectionTask_FilterNamespaceField(t *testing.T) {
	mix := NewMixCoordMock()
	ctx := context.Background()
	InitMetaCache(ctx, mix)

	dbName := ""
	collectionName := "TestDescribeCollectionTask_FilterNamespaceField"

	schema := &schemapb.CollectionSchema{
		Name:               collectionName,
		EnableDynamicField: true,
		Fields: []*schemapb.FieldSchema{
			{
				FieldID:      common.StartOfUserFieldID,
				Name:         "id",
				IsPrimaryKey: true,
				AutoID:       true,
				DataType:     schemapb.DataType_Int64,
			},
			{
				FieldID:  common.StartOfUserFieldID + 1,
				Name:     "fvec",
				DataType: schemapb.DataType_FloatVector,
				TypeParams: []*commonpb.KeyValuePair{
					{
						Key:   common.DimKey,
						Value: strconv.Itoa(8),
					},
				},
			},
			{
				FieldID:         common.StartOfUserFieldID + 2,
				Name:            common.NamespaceFieldName,
				IsPartitionKey:  true,
				DataType:        schemapb.DataType_VarChar,
				TypeParams:      []*commonpb.KeyValuePair{{Key: common.MaxLengthKey, Value: "128"}},
				IsClusteringKey: false,
			},
			{
				FieldID:   common.StartOfUserFieldID + 3,
				Name:      common.MetaFieldName,
				DataType:  schemapb.DataType_JSON,
				IsDynamic: true,
			},
		},
	}

	mix.SetDescribeCollectionFunc(func(ctx context.Context, request *milvuspb.DescribeCollectionRequest) (*milvuspb.DescribeCollectionResponse, error) {
		return &milvuspb.DescribeCollectionResponse{
			Status:       merr.Success(),
			Schema:       schema,
			CollectionID: 1,
		}, nil
	})

	task := &describeCollectionTask{
		Condition: NewTaskCondition(ctx),
		DescribeCollectionRequest: &milvuspb.DescribeCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_DescribeCollection,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: collectionName,
		},
		ctx:      ctx,
		mixCoord: mix,
	}

	err := task.PreExecute(ctx)
	assert.NoError(t, err)

	err = task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, task.result.GetStatus().GetErrorCode())

	fieldNames := make(map[string]struct{})
	for _, f := range task.result.Schema.Fields {
		fieldNames[f.GetName()] = struct{}{}
	}
	_, hasNamespace := fieldNames[common.NamespaceFieldName]
	assert.False(t, hasNamespace)
	_, hasMeta := fieldNames[common.MetaFieldName]
	assert.False(t, hasMeta)

	assert.Equal(t, 2, len(task.result.Schema.Fields))
	assert.Equal(t, collectionName, task.result.GetCollectionName())
}

// Security regression: DescribeCollection must redact credentials embedded in
// ExternalSpec.extfs (access_key_id / access_key_value / ssl_ca_cert) before
// returning to the client. Any caller with Describe privilege would otherwise
// be able to read another tenant's object-storage credentials out of the
// persisted collection metadata.
func TestDescribeCollectionTask_RedactsExternalSpecCredentials(t *testing.T) {
	mix := NewMixCoordMock()
	ctx := context.Background()
	InitMetaCache(ctx, mix)

	collectionName := "TestDescribeCollectionTask_RedactsExternalSpecCredentials"

	rawSpec := `{"format":"parquet","extfs":{"access_key_id":"AKIAEXAMPLE","access_key_value":"SUPERSECRET","region":"us-east-1"}}`

	schema := &schemapb.CollectionSchema{
		Name:           collectionName,
		ExternalSource: "s3://my-bucket/data/",
		ExternalSpec:   rawSpec,
		Fields: []*schemapb.FieldSchema{
			{
				FieldID:      common.StartOfUserFieldID,
				Name:         "id",
				IsPrimaryKey: true,
				DataType:     schemapb.DataType_Int64,
			},
		},
	}

	mix.SetDescribeCollectionFunc(func(ctx context.Context, request *milvuspb.DescribeCollectionRequest) (*milvuspb.DescribeCollectionResponse, error) {
		return &milvuspb.DescribeCollectionResponse{
			Status:       merr.Success(),
			Schema:       schema,
			CollectionID: 1,
		}, nil
	})

	task := &describeCollectionTask{
		Condition: NewTaskCondition(ctx),
		DescribeCollectionRequest: &milvuspb.DescribeCollectionRequest{
			Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_DescribeCollection},
			CollectionName: collectionName,
		},
		ctx:      ctx,
		mixCoord: mix,
	}

	assert.NoError(t, task.PreExecute(ctx))
	assert.NoError(t, task.Execute(ctx))

	// describeCollectionTask now passes ExternalSpec through unredacted —
	// redaction lives at the public proxy.DescribeCollection edge so both
	// cached and remote provider paths converge through one sanitizer.
	// The task-level result must still carry raw creds so that the
	// post-task wrapper can choose to redact (user-facing) or not
	// (internal callers, if added later, that need raw spec for FFI).
	out := task.result.Schema.ExternalSpec
	assert.Contains(t, out, "AKIAEXAMPLE",
		"task-level result must carry raw spec; redaction is applied at proxy edge")
	assert.Contains(t, out, "SUPERSECRET",
		"task-level result must carry raw spec; redaction is applied at proxy edge")
}

func TestDescribeCollectionTask_ShardsNum2(t *testing.T) {
	mix := NewMixCoordMock()
	ctx := context.Background()
	InitMetaCache(ctx, mix)
	prefix := "TestDescribeCollectionTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()

	int64Field := "int64"
	floatVecField := "fvec"
	dim := 128

	schema := constructCollectionSchema(int64Field, floatVecField, dim, collectionName)
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	createColReq := &milvuspb.CreateCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_DropCollection,
			MsgID:     100,
			Timestamp: 100,
		},
		DbName:         dbName,
		CollectionName: collectionName,
		Schema:         marshaledSchema,
	}

	mix.CreateCollection(ctx, createColReq)
	globalMetaCache.GetCollectionID(ctx, GetCurDBNameFromContextOrDefault(ctx), collectionName)

	// CreateCollection
	task := &describeCollectionTask{
		Condition: NewTaskCondition(ctx),
		DescribeCollectionRequest: &milvuspb.DescribeCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_DescribeCollection,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: collectionName,
		},
		ctx:      ctx,
		mixCoord: mix,
		result:   nil,
	}
	task.PreExecute(ctx)

	// missing collectionID in globalMetaCache
	err = task.Execute(ctx)
	assert.NoError(t, err)

	err = task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, task.result.GetStatus().GetErrorCode())
	assert.Equal(t, common.DefaultShardsNum, task.result.ShardsNum)
	assert.Equal(t, collectionName, task.result.GetCollectionName())
}

func TestCreatePartitionTask(t *testing.T) {
	rc := mocks.NewMockMixCoordClient(t)

	mockCache := NewMockCache(t)
	mockCache.EXPECT().GetCollectionSchema(mock.Anything, mock.Anything, mock.Anything).Return(newSchemaInfo(&schemapb.CollectionSchema{
		EnableDynamicField: false,
		Fields: []*schemapb.FieldSchema{
			{FieldID: 100, Name: "ID", DataType: schemapb.DataType_Int64},
			{FieldID: 101, Name: "Vector", DataType: schemapb.DataType_FloatVector},
		},
	}), nil)
	globalMetaCache = mockCache

	ctx := context.Background()
	prefix := "TestCreatePartitionTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()
	partitionName := prefix + funcutil.GenRandomStr()

	task := &createPartitionTask{
		Condition: NewTaskCondition(ctx),
		CreatePartitionRequest: &milvuspb.CreatePartitionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_CreatePartition,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: collectionName,
			PartitionName:  partitionName,
		},
		ctx:      ctx,
		mixCoord: rc,
		result:   nil,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_CreatePartition, task.Type())
	assert.Equal(t, UniqueID(100), task.ID())
	assert.Equal(t, Timestamp(100), task.BeginTs())
	assert.Equal(t, Timestamp(100), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.GetBase().GetSourceID())

	// setup global meta cache
	mockCache.EXPECT().GetCollectionID(mock.Anything, mock.Anything, mock.Anything).Return(100, nil).Once()
	rc.EXPECT().CreatePartitionV2(mock.Anything, mock.Anything).Return(&rootcoordpb.CreatePartitionResponse{
		Status:      merr.Success(),
		PartitionID: 1000,
	}, nil).Once()
	rc.EXPECT().SyncNewCreatedPartition(mock.Anything, mock.Anything).Return(merr.Success(), nil).Once()
	err := task.Execute(ctx)
	assert.NoError(t, err)

	task.CollectionName = "#0xc0de"
	err = task.PreExecute(ctx)
	assert.Error(t, err)

	task.CollectionName = collectionName
	task.PartitionName = "#0xc0de"
	err = task.PreExecute(ctx)
	assert.Error(t, err)
}

func TestDropPartitionTask(t *testing.T) {
	ctx := context.Background()
	prefix := "TestDropPartitionTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()
	partitionName := prefix + funcutil.GenRandomStr()
	mixc := NewMixCoordMock()
	mockCache := NewMockCache(t)
	mockCache.On("GetCollectionID",
		mock.Anything, // context.Context
		mock.AnythingOfType("string"),
		mock.AnythingOfType("string"),
	).Return(UniqueID(1), nil)
	mockCache.On("GetPartitionID",
		mock.Anything, // context.Context
		mock.AnythingOfType("string"),
		mock.AnythingOfType("string"),
		mock.AnythingOfType("string"),
	).Return(UniqueID(1), nil)
	mockCache.On("GetCollectionSchema",
		mock.Anything, // context.Context
		mock.AnythingOfType("string"),
		mock.AnythingOfType("string"),
		mock.AnythingOfType("string"),
	).Return(newSchemaInfo(&schemapb.CollectionSchema{}), nil)
	globalMetaCache = mockCache

	task := &dropPartitionTask{
		Condition: NewTaskCondition(ctx),
		DropPartitionRequest: &milvuspb.DropPartitionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_DropPartition,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: collectionName,
			PartitionName:  partitionName,
		},
		ctx:      ctx,
		mixCoord: mixc,
		result:   nil,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_DropPartition, task.Type())
	assert.Equal(t, UniqueID(100), task.ID())
	assert.Equal(t, Timestamp(100), task.BeginTs())
	assert.Equal(t, Timestamp(100), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.GetBase().GetSourceID())
	err := task.Execute(ctx)
	assert.Error(t, err)

	task.CollectionName = "#0xc0de"
	err = task.PreExecute(ctx)
	assert.Error(t, err)

	task.CollectionName = collectionName
	task.PartitionName = "#0xc0de"
	err = task.PreExecute(ctx)
	assert.Error(t, err)

	t.Run("get collectionID error", func(t *testing.T) {
		mockCache := NewMockCache(t)
		mockCache.On("GetCollectionID",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(UniqueID(1), errors.New("error"))
		mockCache.On("GetCollectionSchema",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(newSchemaInfo(&schemapb.CollectionSchema{}), nil)
		globalMetaCache = mockCache
		task.PartitionName = "partition1"
		err = task.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("partition not exist", func(t *testing.T) {
		task.PartitionName = "partition2"

		mockCache := NewMockCache(t)
		mockCache.On("GetPartitionID",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(UniqueID(0), merr.WrapErrPartitionNotFound(partitionName))
		mockCache.On("GetCollectionID",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(UniqueID(1), nil)
		mockCache.On("GetCollectionSchema",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(newSchemaInfo(&schemapb.CollectionSchema{}), nil)
		globalMetaCache = mockCache
		err = task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("get partition error", func(t *testing.T) {
		task.PartitionName = "partition3"

		mockCache := NewMockCache(t)
		mockCache.On("GetPartitionID",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(UniqueID(0), errors.New("error"))
		mockCache.On("GetCollectionID",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(UniqueID(1), nil)
		mockCache.On("GetCollectionSchema",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(newSchemaInfo(&schemapb.CollectionSchema{}), nil)
		globalMetaCache = mockCache
		err = task.PreExecute(ctx)
		assert.Error(t, err)
	})
}

func TestHasPartitionTask(t *testing.T) {
	rc := NewMixCoordMock()

	defer rc.Close()
	ctx := context.Background()
	prefix := "TestHasPartitionTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()
	partitionName := prefix + funcutil.GenRandomStr()

	task := &hasPartitionTask{
		Condition: NewTaskCondition(ctx),
		HasPartitionRequest: &milvuspb.HasPartitionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_HasPartition,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: collectionName,
			PartitionName:  partitionName,
		},
		ctx:      ctx,
		mixCoord: rc,
		result:   nil,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_HasPartition, task.Type())
	assert.Equal(t, UniqueID(100), task.ID())
	assert.Equal(t, Timestamp(100), task.BeginTs())
	assert.Equal(t, Timestamp(100), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.GetBase().GetSourceID())
	err := task.Execute(ctx)
	assert.Error(t, err)

	task.CollectionName = "#0xc0de"
	err = task.PreExecute(ctx)
	assert.Error(t, err)

	task.CollectionName = collectionName
	task.PartitionName = "#0xc0de"
	err = task.PreExecute(ctx)
	assert.Error(t, err)
}

func TestShowPartitionsTask(t *testing.T) {
	mixc := NewMixCoordMock()

	defer mixc.Close()
	ctx := context.Background()
	prefix := "TestShowPartitionsTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()
	partitionName := prefix + funcutil.GenRandomStr()

	task := &showPartitionsTask{
		Condition: NewTaskCondition(ctx),
		ShowPartitionsRequest: &milvuspb.ShowPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_ShowPartitions,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: collectionName,
			PartitionNames: []string{partitionName},
			Type:           milvuspb.ShowType_All,
		},
		ctx:      ctx,
		mixCoord: mixc,
		result:   nil,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_ShowPartitions, task.Type())
	assert.Equal(t, UniqueID(100), task.ID())
	assert.Equal(t, Timestamp(100), task.BeginTs())
	assert.Equal(t, Timestamp(100), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.GetBase().GetSourceID())
	err := task.Execute(ctx)
	assert.Error(t, err)

	task.CollectionName = "#0xc0de"
	err = task.PreExecute(ctx)
	assert.Error(t, err)

	task.CollectionName = collectionName
	task.ShowPartitionsRequest.Type = milvuspb.ShowType_InMemory
	task.PartitionNames = []string{"#0xc0de"}
	err = task.PreExecute(ctx)
	assert.Error(t, err)

	task.CollectionName = collectionName
	task.PartitionNames = []string{partitionName}
	task.ShowPartitionsRequest.Type = milvuspb.ShowType_InMemory
	err = task.Execute(ctx)
	assert.Error(t, err)
}

func TestTask_Int64PrimaryKey(t *testing.T) {
	var err error

	qc := NewMixCoordMock()
	ctx := context.Background()

	err = InitMetaCache(ctx, qc)
	assert.NoError(t, err)

	shardsNum := int32(2)
	prefix := "TestTask_int64pk"
	dbName := "int64PK"
	collectionName := prefix + funcutil.GenRandomStr()
	partitionName := prefix + funcutil.GenRandomStr()

	fieldName2Types := map[string]schemapb.DataType{
		testBoolField:     schemapb.DataType_Bool,
		testInt32Field:    schemapb.DataType_Int32,
		testInt64Field:    schemapb.DataType_Int64,
		testFloatField:    schemapb.DataType_Float,
		testDoubleField:   schemapb.DataType_Double,
		testFloatVecField: schemapb.DataType_FloatVector,
	}
	if enableMultipleVectorFields {
		fieldName2Types[testBinaryVecField] = schemapb.DataType_BinaryVector
	}
	nb := 10

	schema := constructCollectionSchemaByDataType(collectionName, fieldName2Types, testInt64Field, false)
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	createColT := &createCollectionTask{
		Condition: NewTaskCondition(ctx),
		CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
			Base:           nil,
			DbName:         dbName,
			CollectionName: collectionName,
			Schema:         marshaledSchema,
			ShardsNum:      shardsNum,
		},
		ctx:      ctx,
		mixCoord: qc,
		result:   nil,
		schema:   nil,
	}

	assert.NoError(t, createColT.OnEnqueue())
	assert.NoError(t, createColT.PreExecute(ctx))
	assert.NoError(t, createColT.Execute(ctx))
	assert.NoError(t, createColT.PostExecute(ctx))

	_, _ = qc.CreatePartition(ctx, &milvuspb.CreatePartitionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_CreatePartition,
			MsgID:     0,
			Timestamp: 0,
			SourceID:  paramtable.GetNodeID(),
		},
		DbName:         dbName,
		CollectionName: collectionName,
		PartitionName:  partitionName,
	})

	collectionID, err := globalMetaCache.GetCollectionID(ctx, dbName, collectionName)
	assert.NoError(t, err)

	dmlChannelsFunc := getDmlChannelsFunc(ctx, qc)
	chMgr := newChannelsMgrImpl(dmlChannelsFunc, nil)
	pchans, err := chMgr.getChannels(collectionID)
	assert.NoError(t, err)

	interval := time.Millisecond * 10
	tso := newMockTsoAllocator()

	ticker := newChannelsTimeTicker(ctx, interval, []string{}, newGetStatisticsFunc(pchans), tso)
	_ = ticker.start()
	defer ticker.close()

	idAllocator, err := allocator.NewIDAllocator(ctx, qc, paramtable.GetNodeID())
	assert.NoError(t, err)
	_ = idAllocator.Start()
	defer idAllocator.Close()

	t.Run("insert", func(t *testing.T) {
		hash := testutils.GenerateHashKeys(nb)
		task := &insertTask{
			insertMsg: &BaseInsertTask{
				BaseMsg: msgstream.BaseMsg{
					HashValues: hash,
				},
				InsertRequest: &msgpb.InsertRequest{
					Base: &commonpb.MsgBase{
						MsgType:  commonpb.MsgType_Insert,
						MsgID:    0,
						SourceID: paramtable.GetNodeID(),
					},
					DbName:         dbName,
					CollectionName: collectionName,
					PartitionName:  partitionName,
					NumRows:        uint64(nb),
					Version:        msgpb.InsertDataVersion_ColumnBased,
				},
			},

			Condition: NewTaskCondition(ctx),
			ctx:       ctx,
			result: &milvuspb.MutationResult{
				Status:       merr.Success(),
				IDs:          nil,
				SuccIndex:    nil,
				ErrIndex:     nil,
				Acknowledged: false,
				InsertCnt:    0,
				DeleteCnt:    0,
				UpsertCnt:    0,
				Timestamp:    0,
			},
			idAllocator: idAllocator,
			chMgr:       chMgr,
			vChannels:   nil,
			pChannels:   nil,
			schema:      nil,
		}

		for fieldName, dataType := range fieldName2Types {
			task.insertMsg.FieldsData = append(task.insertMsg.FieldsData, generateFieldData(dataType, fieldName, nb))
		}

		assert.NoError(t, task.OnEnqueue())
		assert.NoError(t, task.PreExecute(ctx))
		assert.NoError(t, task.Execute(ctx))
		assert.NoError(t, task.PostExecute(ctx))
	})

	t.Run("simple delete", func(t *testing.T) {
		task := &deleteTask{
			Condition: NewTaskCondition(ctx),
			req: &milvuspb.DeleteRequest{
				CollectionName: collectionName,
				PartitionName:  partitionName,
				Expr:           "int64 in [0, 1]",
			},
			idAllocator: idAllocator,
			ctx:         ctx,
			primaryKeys: &schemapb.IDs{
				IdField: &schemapb.IDs_IntId{IntId: &schemapb.LongArray{Data: []int64{0, 1}}},
			},
			chMgr:        chMgr,
			chTicker:     ticker,
			collectionID: collectionID,
			vChannels:    []string{"test-ch"},
		}

		assert.NoError(t, task.OnEnqueue())
		assert.NotNil(t, task.TraceCtx())

		id := UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt())
		task.SetID(id)
		assert.Equal(t, id, task.ID())
		assert.Equal(t, commonpb.MsgType_Delete, task.Type())

		ts := Timestamp(time.Now().UnixNano())
		task.SetTs(ts)
		assert.Equal(t, ts, task.BeginTs())
		assert.Equal(t, ts, task.EndTs())

		assert.NoError(t, task.PreExecute(ctx))
		assert.NoError(t, task.Execute(ctx))
		assert.NoError(t, task.PostExecute(ctx))
	})
}

func TestIndexType(t *testing.T) {
	rc := NewMixCoordMock()
	defer rc.Close()

	ctx := context.Background()
	shardsNum := int32(2)
	prefix := "TestTask_all"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()

	fieldName2Types := map[string]schemapb.DataType{
		testBoolField:     schemapb.DataType_Bool,
		testInt32Field:    schemapb.DataType_Int32,
		testInt64Field:    schemapb.DataType_Int64,
		testFloatField:    schemapb.DataType_Float,
		testDoubleField:   schemapb.DataType_Double,
		testFloatVecField: schemapb.DataType_FloatVector,
	}

	t.Run("invalid type param", func(t *testing.T) {
		paramtable.Init()
		Params.Save(Params.AutoIndexConfig.Enable.Key, "true")
		defer Params.Reset(Params.AutoIndexConfig.Enable.Key)

		schema := constructCollectionSchemaByDataType(collectionName, fieldName2Types, testInt64Field, false)
		for _, field := range schema.Fields {
			dataType := field.GetDataType()
			if typeutil.IsVectorType(dataType) {
				field.IndexParams = append(field.IndexParams, &commonpb.KeyValuePair{
					Key:   common.MmapEnabledKey,
					Value: "true",
				})
				break
			}
		}
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createColT := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base:           nil,
				DbName:         dbName,
				CollectionName: collectionName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: rc,
		}
		assert.NoError(t, createColT.OnEnqueue())
		assert.Error(t, createColT.PreExecute(ctx))
	})
}

func TestTask_VarCharPrimaryKey(t *testing.T) {
	var err error
	mixc := NewMixCoordMock()

	ctx := context.Background()

	err = InitMetaCache(ctx, mixc)
	assert.NoError(t, err)

	shardsNum := int32(2)
	prefix := "TestTask_all"
	dbName := "testvarchar"
	collectionName := prefix + funcutil.GenRandomStr()
	partitionName := prefix + funcutil.GenRandomStr()

	fieldName2Types := map[string]schemapb.DataType{
		testBoolField:     schemapb.DataType_Bool,
		testInt32Field:    schemapb.DataType_Int32,
		testInt64Field:    schemapb.DataType_Int64,
		testFloatField:    schemapb.DataType_Float,
		testDoubleField:   schemapb.DataType_Double,
		testVarCharField:  schemapb.DataType_VarChar,
		testFloatVecField: schemapb.DataType_FloatVector,
	}
	if enableMultipleVectorFields {
		fieldName2Types[testBinaryVecField] = schemapb.DataType_BinaryVector
	}
	nb := 10

	schema := constructCollectionSchemaByDataType(collectionName, fieldName2Types, testVarCharField, false)
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	createColT := &createCollectionTask{
		Condition: NewTaskCondition(ctx),
		CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
			Base:           nil,
			DbName:         dbName,
			CollectionName: collectionName,
			Schema:         marshaledSchema,
			ShardsNum:      shardsNum,
		},
		ctx:      ctx,
		mixCoord: mixc,
		result:   nil,
		schema:   nil,
	}

	assert.NoError(t, createColT.OnEnqueue())
	assert.NoError(t, createColT.PreExecute(ctx))
	assert.NoError(t, createColT.Execute(ctx))
	assert.NoError(t, createColT.PostExecute(ctx))

	_, _ = mixc.CreatePartition(ctx, &milvuspb.CreatePartitionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_CreatePartition,
			MsgID:     0,
			Timestamp: 0,
			SourceID:  paramtable.GetNodeID(),
		},
		DbName:         dbName,
		CollectionName: collectionName,
		PartitionName:  partitionName,
	})

	collectionID, err := globalMetaCache.GetCollectionID(ctx, dbName, collectionName)
	assert.NoError(t, err)

	dmlChannelsFunc := getDmlChannelsFunc(ctx, mixc)
	chMgr := newChannelsMgrImpl(dmlChannelsFunc, nil)
	pchans, err := chMgr.getChannels(collectionID)
	assert.NoError(t, err)

	interval := time.Millisecond * 10
	tso := newMockTsoAllocator()

	ticker := newChannelsTimeTicker(ctx, interval, []string{}, newGetStatisticsFunc(pchans), tso)
	_ = ticker.start()
	defer ticker.close()

	idAllocator, err := allocator.NewIDAllocator(ctx, mixc, paramtable.GetNodeID())
	assert.NoError(t, err)
	_ = idAllocator.Start()
	defer idAllocator.Close()

	t.Run("insert", func(t *testing.T) {
		hash := testutils.GenerateHashKeys(nb)
		task := &insertTask{
			insertMsg: &BaseInsertTask{
				BaseMsg: msgstream.BaseMsg{
					HashValues: hash,
				},
				InsertRequest: &msgpb.InsertRequest{
					Base: &commonpb.MsgBase{
						MsgType:  commonpb.MsgType_Insert,
						MsgID:    0,
						SourceID: paramtable.GetNodeID(),
					},
					DbName:         dbName,
					CollectionName: collectionName,
					PartitionName:  partitionName,
					NumRows:        uint64(nb),
					Version:        msgpb.InsertDataVersion_ColumnBased,
				},
			},

			Condition: NewTaskCondition(ctx),
			ctx:       ctx,
			result: &milvuspb.MutationResult{
				Status:       merr.Success(),
				IDs:          nil,
				SuccIndex:    nil,
				ErrIndex:     nil,
				Acknowledged: false,
				InsertCnt:    0,
				DeleteCnt:    0,
				UpsertCnt:    0,
				Timestamp:    0,
			},
			idAllocator: idAllocator,
			chMgr:       chMgr,
			vChannels:   nil,
			pChannels:   nil,
			schema:      nil,
		}

		fieldID := common.StartOfUserFieldID
		for fieldName, dataType := range fieldName2Types {
			task.insertMsg.FieldsData = append(task.insertMsg.FieldsData, generateFieldData(dataType, fieldName, nb))
			fieldID++
		}

		assert.NoError(t, task.OnEnqueue())
		assert.NoError(t, task.PreExecute(ctx))
		assert.NoError(t, task.Execute(ctx))
		assert.NoError(t, task.PostExecute(ctx))
	})

	t.Run("upsert", func(t *testing.T) {
		hash := testutils.GenerateHashKeys(nb)
		task := &upsertTask{
			upsertMsg: &msgstream.UpsertMsg{
				InsertMsg: &BaseInsertTask{
					BaseMsg: msgstream.BaseMsg{
						HashValues: hash,
					},
					InsertRequest: &msgpb.InsertRequest{
						Base: &commonpb.MsgBase{
							MsgType:  commonpb.MsgType_Insert,
							MsgID:    0,
							SourceID: paramtable.GetNodeID(),
						},
						DbName:         dbName,
						CollectionName: collectionName,
						PartitionName:  partitionName,
						NumRows:        uint64(nb),
						Version:        msgpb.InsertDataVersion_ColumnBased,
					},
				},
				DeleteMsg: &msgstream.DeleteMsg{
					BaseMsg: msgstream.BaseMsg{
						HashValues: hash,
					},
					DeleteRequest: &msgpb.DeleteRequest{
						Base: &commonpb.MsgBase{
							MsgType:   commonpb.MsgType_Delete,
							MsgID:     0,
							Timestamp: 0,
							SourceID:  paramtable.GetNodeID(),
						},
						DbName:         dbName,
						CollectionName: collectionName,
						PartitionName:  partitionName,
					},
				},
			},

			Condition: NewTaskCondition(ctx),
			req: &milvuspb.UpsertRequest{
				Base: &commonpb.MsgBase{
					MsgType:  commonpb.MsgType_Insert,
					MsgID:    0,
					SourceID: paramtable.GetNodeID(),
				},
				DbName:         dbName,
				CollectionName: collectionName,
				PartitionName:  partitionName,
				HashKeys:       hash,
				NumRows:        uint32(nb),
			},
			ctx: ctx,
			result: &milvuspb.MutationResult{
				Status:       merr.Success(),
				IDs:          nil,
				SuccIndex:    nil,
				ErrIndex:     nil,
				Acknowledged: false,
				InsertCnt:    0,
				DeleteCnt:    0,
				UpsertCnt:    0,
				Timestamp:    0,
			},
			idAllocator: idAllocator,
			chMgr:       chMgr,
			chTicker:    ticker,
			vChannels:   nil,
			pChannels:   nil,
			schema:      nil,
		}

		fieldID := common.StartOfUserFieldID
		for fieldName, dataType := range fieldName2Types {
			task.req.FieldsData = append(task.req.FieldsData, generateFieldData(dataType, fieldName, nb))
			fieldID++
		}

		assert.NoError(t, task.OnEnqueue())
		assert.NoError(t, task.PreExecute(ctx))
		assert.NoError(t, task.Execute(ctx))
		assert.NoError(t, task.PostExecute(ctx))
	})

	t.Run("simple delete", func(t *testing.T) {
		task := &deleteTask{
			Condition: NewTaskCondition(ctx),
			req: &milvuspb.DeleteRequest{
				CollectionName: collectionName,
				PartitionName:  partitionName,
				Expr:           "varChar in [\"milvus\", \"test\"]",
			},
			idAllocator: idAllocator,
			ctx:         ctx,
			chMgr:       chMgr,
			chTicker:    ticker,
			vChannels:   []string{"test-channel"},
			primaryKeys: &schemapb.IDs{
				IdField: &schemapb.IDs_StrId{StrId: &schemapb.StringArray{Data: []string{"milvus", "test"}}},
			},
			collectionID: collectionID,
		}

		assert.NoError(t, task.OnEnqueue())
		assert.NotNil(t, task.TraceCtx())

		id := UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt())
		task.SetID(id)
		assert.Equal(t, id, task.ID())
		assert.Equal(t, commonpb.MsgType_Delete, task.Type())

		ts := Timestamp(time.Now().UnixNano())
		task.SetTs(ts)
		assert.Equal(t, ts, task.BeginTs())
		assert.Equal(t, ts, task.EndTs())

		assert.NoError(t, task.PreExecute(ctx))
		assert.NoError(t, task.Execute(ctx))
		assert.NoError(t, task.PostExecute(ctx))
	})
}

func Test_createIndexTask_getIndexedFieldAndFunction(t *testing.T) {
	collectionName := "test"
	fieldName := "test"

	cit := &createIndexTask{
		req: &milvuspb.CreateIndexRequest{
			CollectionName: collectionName,
			FieldName:      fieldName,
		},
	}

	idField := &schemapb.FieldSchema{
		FieldID:      100,
		Name:         "id",
		IsPrimaryKey: false,
		DataType:     schemapb.DataType_FloatVector,
		TypeParams:   nil,
		IndexParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "128",
			},
		},
		AutoID: false,
	}
	vectorField := &schemapb.FieldSchema{
		FieldID:      101,
		Name:         fieldName,
		IsPrimaryKey: false,
		DataType:     schemapb.DataType_FloatVector,
		TypeParams:   nil,
		IndexParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: "128",
			},
		},
		AutoID: false,
	}

	t.Run("normal", func(t *testing.T) {
		cache := NewMockCache(t)
		cache.On("GetCollectionSchema",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(newSchemaInfo(&schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				idField,
				vectorField,
			},
		}), nil)

		globalMetaCache = cache
		err := cit.getIndexedFieldAndFunction(context.Background())
		assert.NoError(t, err)
		assert.Equal(t, fieldName, cit.fieldSchema.GetName())
	})

	t.Run("schema not found", func(t *testing.T) {
		cache := NewMockCache(t)
		cache.On("GetCollectionSchema",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(nil, errors.New("mock"))
		globalMetaCache = cache
		err := cit.getIndexedFieldAndFunction(context.Background())
		assert.Error(t, err)
	})

	t.Run("field not found", func(t *testing.T) {
		otherField := typeutil.Clone(vectorField)
		otherField.Name = otherField.Name + "_other"
		cache := NewMockCache(t)
		cache.On("GetCollectionSchema",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(newSchemaInfo(&schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				idField,
				otherField,
			},
		}), nil)
		globalMetaCache = cache
		err := cit.getIndexedFieldAndFunction(context.Background())
		assert.Error(t, err)
	})
}

func Test_fillDimension(t *testing.T) {
	// fillDimension moved to indexparamcheck.FillDimension (shared with the
	// add-function-field bound-index path); coverage kept here for the proxy flow.
	t.Run("scalar", func(t *testing.T) {
		f := &schemapb.FieldSchema{
			DataType: schemapb.DataType_Int64,
		}
		assert.NoError(t, indexparamcheck.FillDimension(f, nil))
	})

	t.Run("no dim in schema", func(t *testing.T) {
		f := &schemapb.FieldSchema{
			DataType: schemapb.DataType_FloatVector,
		}
		assert.Error(t, indexparamcheck.FillDimension(f, nil))
	})

	t.Run("dimension mismatch", func(t *testing.T) {
		f := &schemapb.FieldSchema{
			DataType: schemapb.DataType_FloatVector,
			IndexParams: []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: "128",
				},
			},
		}
		assert.Error(t, indexparamcheck.FillDimension(f, map[string]string{common.DimKey: "8"}))
	})

	t.Run("normal", func(t *testing.T) {
		f := &schemapb.FieldSchema{
			DataType: schemapb.DataType_FloatVector,
			IndexParams: []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: "128",
				},
			},
		}
		m := map[string]string{}
		assert.NoError(t, indexparamcheck.FillDimension(f, m))
		assert.Equal(t, "128", m[common.DimKey])
	})
}

func Test_checkTrain(t *testing.T) {
	t.Run("normal", func(t *testing.T) {
		f := &schemapb.FieldSchema{
			DataType: schemapb.DataType_FloatVector,
			IndexParams: []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: "128",
				},
			},
		}
		m := map[string]string{
			common.IndexTypeKey:  "IVF_FLAT",
			"nlist":              "1024",
			common.MetricTypeKey: "L2",
		}
		assert.NoError(t, checkTrain(context.TODO(), f, m))
	})

	t.Run("scalar", func(t *testing.T) {
		f := &schemapb.FieldSchema{
			DataType: schemapb.DataType_Int64,
		}
		m := map[string]string{
			common.IndexTypeKey: "scalar",
		}
		assert.Error(t, checkTrain(context.TODO(), f, m))
	})

	t.Run("dimension mismatch", func(t *testing.T) {
		f := &schemapb.FieldSchema{
			DataType: schemapb.DataType_FloatVector,
			IndexParams: []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: "128",
				},
			},
		}
		m := map[string]string{
			common.IndexTypeKey:  "IVF_FLAT",
			"nlist":              "1024",
			common.MetricTypeKey: "L2",
			common.DimKey:        "8",
		}
		assert.Error(t, checkTrain(context.TODO(), f, m))
	})

	t.Run("nlist test", func(t *testing.T) {
		f := &schemapb.FieldSchema{
			DataType: schemapb.DataType_FloatVector,
			IndexParams: []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: "128",
				},
			},
		}
		m := map[string]string{
			common.IndexTypeKey:  "IVF_FLAT",
			common.MetricTypeKey: "L2",
		}
		assert.NoError(t, checkTrain(context.TODO(), f, m))
	})
}

func Test_createIndexTask_PreExecute(t *testing.T) {
	collectionName := "test"
	fieldName := "test"

	cit := &createIndexTask{
		req: &milvuspb.CreateIndexRequest{
			Base: &commonpb.MsgBase{
				MsgType: commonpb.MsgType_CreateIndex,
			},
			CollectionName: collectionName,
			FieldName:      fieldName,
		},
	}

	t.Run("normal", func(t *testing.T) {
		cache := NewMockCache(t)
		cache.On("GetCollectionID",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(UniqueID(100), nil)
		cache.On("GetCollectionSchema",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(newSchemaInfo(&schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				{
					FieldID:      100,
					Name:         fieldName,
					IsPrimaryKey: false,
					DataType:     schemapb.DataType_FloatVector,
					TypeParams:   nil,
					IndexParams: []*commonpb.KeyValuePair{
						{
							Key:   "dim",
							Value: "128",
						},
					},
					AutoID: false,
				},
			},
		}), nil)
		cache.On("GetCollectionInfo",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
			mock.AnythingOfType("int64"),
		).Return(&collectionInfo{}, nil)
		globalMetaCache = cache
		cit.req.ExtraParams = []*commonpb.KeyValuePair{
			{
				Key:   common.IndexTypeKey,
				Value: "IVF_FLAT",
			},
			{
				Key:   "nlist",
				Value: "1024",
			},
			{
				Key:   common.MetricTypeKey,
				Value: "L2",
			},
		}
		assert.NoError(t, cit.PreExecute(context.Background()))
	})

	t.Run("collection not found", func(t *testing.T) {
		cache := NewMockCache(t)
		cache.On("GetCollectionID",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(UniqueID(0), errors.New("mock"))
		globalMetaCache = cache
		assert.Error(t, cit.PreExecute(context.Background()))
	})

	t.Run("index name length exceed 255", func(t *testing.T) {
		cache := NewMockCache(t)
		cache.On("GetCollectionID",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
		).Return(UniqueID(100), nil)
		cache.On("GetCollectionInfo",
			mock.Anything, // context.Context
			mock.AnythingOfType("string"),
			mock.AnythingOfType("string"),
			mock.AnythingOfType("int64"),
		).Return(&collectionInfo{}, nil)
		globalMetaCache = cache

		for i := 0; i < 256; i++ {
			cit.req.IndexName += "a"
		}
		err := cit.PreExecute(context.Background())

		assert.Error(t, err)
	})

	t.Run("index name start with number", func(t *testing.T) {
		cit.req.IndexName = "12a"
		err := cit.PreExecute(context.Background())

		assert.Error(t, err)
	})

	t.Run("index name include special characters", func(t *testing.T) {
		cit.req.IndexName = "ac#1"
		err := cit.PreExecute(context.Background())

		assert.Error(t, err)
	})
}

func Test_dropCollectionTask_PreExecute(t *testing.T) {
	dct := &dropCollectionTask{DropCollectionRequest: &milvuspb.DropCollectionRequest{
		Base:           &commonpb.MsgBase{},
		CollectionName: "valid", // invalid

	}}
	globalMetaCache = &MetaCache{}
	mockGetCollectionID := mockey.Mock((*MetaCache).GetCollectionID).To(func(ctx context.Context, dbName, collectionName string) (UniqueID, error) {
		return 1, nil
	}).Build()
	defer mockGetCollectionID.UnPatch()

	mockRC := mocks.NewMockMixCoordClient(t)
	dct.mixCoord = mockRC
	ctx := context.Background()
	err := dct.PreExecute(ctx)
	assert.NoError(t, err)
}

func Test_dropCollectionTask_Execute(t *testing.T) {
	mockRC := mocks.NewMockMixCoordClient(t)
	mockRC.On("DropCollection",
		mock.Anything, // context.Context
		mock.Anything, // *milvuspb.DropCollectionRequest
		mock.Anything,
	).Return(&commonpb.Status{}, func(ctx context.Context, request *milvuspb.DropCollectionRequest, opts ...grpc.CallOption) error {
		switch request.GetCollectionName() {
		case "c1":
			return errors.New("error mock DropCollection")
		case "c2":
			return merr.WrapErrCollectionNotFound("mock")
		default:
			return nil
		}
	})

	ctx := context.Background()

	dct := &dropCollectionTask{mixCoord: mockRC, DropCollectionRequest: &milvuspb.DropCollectionRequest{CollectionName: "normal"}}
	err := dct.Execute(ctx)
	assert.NoError(t, err)

	dct.CollectionName = "c1"
	err = dct.Execute(ctx)
	assert.Error(t, err)

	dct.CollectionName = "c2"
	err = dct.Execute(ctx)
	assert.Error(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, dct.result.GetErrorCode())
}

func Test_dropCollectionTask_PostExecute(t *testing.T) {
	dct := &dropCollectionTask{}
	assert.NoError(t, dct.PostExecute(context.Background()))
}

func Test_truncateCollectionTask_PreExecute(t *testing.T) {
	mix := NewMixCoordMock()
	ctx := context.Background()
	require.NoError(t, InitMetaCache(ctx, mix))

	dbName := ""
	regularName := "regular_truncate_" + funcutil.GenRandomStr()
	externalName := "ext_truncate_" + funcutil.GenRandomStr()

	regularSchema := constructCollectionSchema("pk", "fvec", 4, regularName)
	regBytes, err := proto.Marshal(regularSchema)
	require.NoError(t, err)
	_, err = mix.CreateCollection(ctx, &milvuspb.CreateCollectionRequest{
		Base:   &commonpb.MsgBase{MsgType: commonpb.MsgType_CreateCollection},
		DbName: dbName, CollectionName: regularName, Schema: regBytes, ShardsNum: 1,
	})
	require.NoError(t, err)

	extSchema := &schemapb.CollectionSchema{
		Name:           externalName,
		ExternalSource: "s3://bucket/path/",
		ExternalSpec:   `{"format":"parquet"}`,
		Fields: []*schemapb.FieldSchema{
			{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true, ExternalField: "id"},
			{
				FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector, ExternalField: "vec",
				TypeParams: []*commonpb.KeyValuePair{{Key: common.DimKey, Value: "4"}},
			},
		},
	}
	extBytes, err := proto.Marshal(extSchema)
	require.NoError(t, err)
	_, err = mix.CreateCollection(ctx, &milvuspb.CreateCollectionRequest{
		Base:   &commonpb.MsgBase{MsgType: commonpb.MsgType_CreateCollection},
		DbName: dbName, CollectionName: externalName, Schema: extBytes, ShardsNum: 1,
	})
	require.NoError(t, err)

	t.Run("regular collection passes", func(t *testing.T) {
		tct := &truncateCollectionTask{TruncateCollectionRequest: &milvuspb.TruncateCollectionRequest{
			Base: &commonpb.MsgBase{}, DbName: dbName, CollectionName: regularName,
		}}
		assert.NoError(t, tct.PreExecute(ctx))
	})

	t.Run("invalid collection name rejected", func(t *testing.T) {
		tct := &truncateCollectionTask{TruncateCollectionRequest: &milvuspb.TruncateCollectionRequest{
			Base: &commonpb.MsgBase{}, CollectionName: "#0xc0de",
		}}
		assert.Error(t, tct.PreExecute(ctx))
	})

	// Truncate is destructive on internal segments and meaningless for
	// external collections (data lives in user object store). Reject up
	// front to prevent silent no-op or inconsistent meta state.
	t.Run("external collection rejected", func(t *testing.T) {
		tct := &truncateCollectionTask{TruncateCollectionRequest: &milvuspb.TruncateCollectionRequest{
			Base: &commonpb.MsgBase{}, DbName: dbName, CollectionName: externalName,
		}}
		err := tct.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "external collection")
		assert.Contains(t, err.Error(), "RefreshExternalCollection")
	})
}

func Test_truncateCollectionTask_Execute(t *testing.T) {
	mockRC := mocks.NewMockMixCoordClient(t)
	mockRC.On("TruncateCollection",
		mock.Anything, // context.Context
		mock.Anything, // *milvuspb.TruncateCollectionRequest
		mock.Anything,
	).Return(&milvuspb.TruncateCollectionResponse{
		Status: merr.Success(),
	}, func(ctx context.Context, request *milvuspb.TruncateCollectionRequest, opts ...grpc.CallOption) error {
		switch request.GetCollectionName() {
		case "c1":
			return errors.New("error mock TruncateCollection")
		case "c2":
			return merr.WrapErrCollectionNotFound("mock")
		default:
			return nil
		}
	})

	ctx := context.Background()

	tct := &truncateCollectionTask{mixCoord: mockRC, TruncateCollectionRequest: &milvuspb.TruncateCollectionRequest{CollectionName: "normal"}}
	err := tct.Execute(ctx)
	assert.NoError(t, err)

	tct.CollectionName = "c1"
	err = tct.Execute(ctx)
	assert.Error(t, err)

	tct.CollectionName = "c2"
	err = tct.Execute(ctx)
	assert.Error(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, tct.result.GetStatus().GetErrorCode())
}

func Test_truncateCollectionTask_PostExecute(t *testing.T) {
	tct := &truncateCollectionTask{}
	assert.NoError(t, tct.PostExecute(context.Background()))
}

func Test_loadCollectionTask_Execute(t *testing.T) {
	rc := NewMixCoordMock()

	dbName := funcutil.GenRandomStr()
	collectionName := funcutil.GenRandomStr()
	collectionID := UniqueID(1)
	// fieldName := funcutil.GenRandomStr()
	indexName := funcutil.GenRandomStr()
	ctx := context.Background()
	indexID := int64(1000)

	// failed to get collection id.
	_ = InitMetaCache(ctx, rc)

	rc.DescribeCollectionFunc = func(ctx context.Context, request *milvuspb.DescribeCollectionRequest, opts ...grpc.CallOption) (*milvuspb.DescribeCollectionResponse, error) {
		return &milvuspb.DescribeCollectionResponse{
			Status:         merr.Success(),
			Schema:         newTestSchema(),
			CollectionID:   collectionID,
			CollectionName: request.CollectionName,
		}, nil
	}

	lct := &loadCollectionTask{
		LoadCollectionRequest: &milvuspb.LoadCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_LoadCollection,
				MsgID:     1,
				Timestamp: 1,
				SourceID:  1,
				TargetID:  1,
			},
			DbName:         dbName,
			CollectionName: collectionName,
			ReplicaNumber:  1,
		},
		ctx:          ctx,
		mixCoord:     rc,
		result:       nil,
		collectionID: 0,
	}

	t.Run("indexcoord describe index error", func(t *testing.T) {
		err := lct.Execute(ctx)
		assert.Error(t, err)
	})

	t.Run("indexcoord describe index not success", func(t *testing.T) {
		rc.DescribeIndexFunc = func(ctx context.Context, request *indexpb.DescribeIndexRequest, opts ...grpc.CallOption) (*indexpb.DescribeIndexResponse, error) {
			return &indexpb.DescribeIndexResponse{
				Status: &commonpb.Status{
					ErrorCode: commonpb.ErrorCode_UnexpectedError,
					Reason:    "fail reason",
				},
			}, nil
		}

		err := lct.Execute(ctx)
		assert.Error(t, err)
	})

	t.Run("no vector index", func(t *testing.T) {
		rc.DescribeIndexFunc = func(ctx context.Context, request *indexpb.DescribeIndexRequest, opts ...grpc.CallOption) (*indexpb.DescribeIndexResponse, error) {
			return &indexpb.DescribeIndexResponse{
				Status: merr.Success(),
				IndexInfos: []*indexpb.IndexInfo{
					{
						CollectionID:         collectionID,
						FieldID:              100,
						IndexName:            indexName,
						IndexID:              indexID,
						TypeParams:           nil,
						IndexParams:          nil,
						IndexedRows:          1025,
						TotalRows:            1025,
						State:                commonpb.IndexState_Finished,
						IndexStateFailReason: "",
						IsAutoIndex:          false,
						UserIndexParams:      nil,
					},
				},
			}, nil
		}

		err := lct.Execute(ctx)
		assert.Error(t, err)
	})

	t.Run("not all vector fields with index", func(t *testing.T) {
		vecFields := make([]*schemapb.FieldSchema, 0)
		for _, field := range newTestSchema().GetFields() {
			if typeutil.IsVectorType(field.GetDataType()) {
				vecFields = append(vecFields, field)
			}
		}

		assert.GreaterOrEqual(t, len(vecFields), 2)

		rc.DescribeIndexFunc = func(ctx context.Context, request *indexpb.DescribeIndexRequest, opts ...grpc.CallOption) (*indexpb.DescribeIndexResponse, error) {
			return &indexpb.DescribeIndexResponse{
				Status: merr.Success(),
				IndexInfos: []*indexpb.IndexInfo{
					{
						CollectionID:         collectionID,
						FieldID:              vecFields[0].FieldID,
						IndexName:            indexName,
						IndexID:              indexID,
						TypeParams:           nil,
						IndexParams:          nil,
						IndexedRows:          1025,
						TotalRows:            1025,
						State:                commonpb.IndexState_Finished,
						IndexStateFailReason: "",
						IsAutoIndex:          false,
						UserIndexParams:      nil,
					},
				},
			}, nil
		}

		err := lct.Execute(ctx)
		assert.Error(t, err)
	})
}

func TestLoadCollectionTaskExecuteTextRequiresStorageV3(t *testing.T) {
	paramtable.Get().Save(paramtable.Get().CommonCfg.UseLoonFFI.Key, "false")
	t.Cleanup(func() {
		paramtable.Get().Reset(paramtable.Get().CommonCfg.UseLoonFFI.Key)
	})

	oldCache := globalMetaCache
	t.Cleanup(func() {
		globalMetaCache = oldCache
	})

	const (
		dbName         = "db"
		collectionName = "text_collection"
		collectionID   = int64(100)
	)
	schema := newSchemaInfo(newTextSchemaForStorageV3Test(collectionName))
	cache := NewMockCache(t)
	cache.EXPECT().GetCollectionID(mock.Anything, dbName, collectionName).Return(collectionID, nil)
	cache.EXPECT().GetCollectionSchema(mock.Anything, dbName, collectionName).Return(schema, nil)
	globalMetaCache = cache

	task := &loadCollectionTask{
		LoadCollectionRequest: &milvuspb.LoadCollectionRequest{
			Base:           commonpbutil.NewMsgBase(),
			DbName:         dbName,
			CollectionName: collectionName,
		},
		ctx: context.Background(),
	}

	err := task.Execute(context.Background())
	assert.Error(t, err)
	assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	assert.Contains(t, err.Error(), "TEXT field requires StorageV3")
}

func Test_loadPartitionTask_Execute(t *testing.T) {
	qc := NewMixCoordMock()

	dbName := funcutil.GenRandomStr()
	collectionName := funcutil.GenRandomStr()
	collectionID := UniqueID(1)
	// fieldName := funcutil.GenRandomStr()
	indexName := funcutil.GenRandomStr()
	ctx := context.Background()
	indexID := int64(1000)

	// failed to get collection id.
	_ = InitMetaCache(ctx, qc)

	qc.DescribeCollectionFunc = func(ctx context.Context, request *milvuspb.DescribeCollectionRequest, opts ...grpc.CallOption) (*milvuspb.DescribeCollectionResponse, error) {
		return &milvuspb.DescribeCollectionResponse{
			Status:         merr.Success(),
			Schema:         newTestSchema(),
			CollectionID:   collectionID,
			CollectionName: request.CollectionName,
		}, nil
	}

	lpt := &loadPartitionsTask{
		LoadPartitionsRequest: &milvuspb.LoadPartitionsRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_LoadCollection,
				MsgID:     1,
				Timestamp: 1,
				SourceID:  1,
				TargetID:  1,
			},
			DbName:         dbName,
			CollectionName: collectionName,
			ReplicaNumber:  1,
		},
		ctx:          ctx,
		mixCoord:     qc,
		result:       nil,
		collectionID: 0,
	}

	t.Run("indexcoord describe index error", func(t *testing.T) {
		err := lpt.Execute(ctx)
		assert.Error(t, err)
	})

	t.Run("indexcoord describe index not success", func(t *testing.T) {
		qc.DescribeIndexFunc = func(ctx context.Context, request *indexpb.DescribeIndexRequest, opts ...grpc.CallOption) (*indexpb.DescribeIndexResponse, error) {
			return &indexpb.DescribeIndexResponse{
				Status: &commonpb.Status{
					ErrorCode: commonpb.ErrorCode_UnexpectedError,
					Reason:    "fail reason",
				},
			}, nil
		}

		err := lpt.Execute(ctx)
		assert.Error(t, err)
	})

	t.Run("no vector index", func(t *testing.T) {
		qc.DescribeIndexFunc = func(ctx context.Context, request *indexpb.DescribeIndexRequest, opts ...grpc.CallOption) (*indexpb.DescribeIndexResponse, error) {
			return &indexpb.DescribeIndexResponse{
				Status: merr.Success(),
				IndexInfos: []*indexpb.IndexInfo{
					{
						CollectionID:         collectionID,
						FieldID:              100,
						IndexName:            indexName,
						IndexID:              indexID,
						TypeParams:           nil,
						IndexParams:          nil,
						IndexedRows:          1025,
						TotalRows:            1025,
						State:                commonpb.IndexState_Finished,
						IndexStateFailReason: "",
						IsAutoIndex:          false,
						UserIndexParams:      nil,
					},
				},
			}, nil
		}

		err := lpt.Execute(ctx)
		assert.Error(t, err)
	})
}

func TestCreateResourceGroupTask(t *testing.T) {
	mixc := NewMixCoordMock()

	defer mixc.Close()

	ctx := context.Background()
	InitMetaCache(ctx, mixc)

	createRGReq := &milvuspb.CreateResourceGroupRequest{
		Base: &commonpb.MsgBase{
			MsgID:     1,
			Timestamp: 2,
			TargetID:  3,
		},
		ResourceGroup: "rg",
	}

	task := &CreateResourceGroupTask{
		CreateResourceGroupRequest: createRGReq,
		ctx:                        ctx,
		mixCoord:                   mixc,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_CreateResourceGroup, task.Type())
	assert.Equal(t, UniqueID(1), task.ID())
	assert.Equal(t, Timestamp(2), task.BeginTs())
	assert.Equal(t, Timestamp(2), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.Base.GetSourceID())
	assert.Equal(t, UniqueID(3), task.Base.GetTargetID())

	err := task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, task.result.ErrorCode)
}

func TestDropResourceGroupTask(t *testing.T) {
	mixc := NewMixCoordMock()

	defer mixc.Close()

	ctx := context.Background()
	InitMetaCache(ctx, mixc)

	dropRGReq := &milvuspb.DropResourceGroupRequest{
		Base: &commonpb.MsgBase{
			MsgID:     1,
			Timestamp: 2,
			TargetID:  3,
		},
		ResourceGroup: "rg",
	}

	task := &DropResourceGroupTask{
		DropResourceGroupRequest: dropRGReq,
		ctx:                      ctx,
		mixCoord:                 mixc,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_DropResourceGroup, task.Type())
	assert.Equal(t, UniqueID(1), task.ID())
	assert.Equal(t, Timestamp(2), task.BeginTs())
	assert.Equal(t, Timestamp(2), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.Base.GetSourceID())
	assert.Equal(t, UniqueID(3), task.Base.GetTargetID())

	err := task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, task.result.ErrorCode)
}

func TestTransferNodeTask(t *testing.T) {
	mixc := NewMixCoordMock()

	defer mixc.Close()
	ctx := context.Background()
	InitMetaCache(ctx, mixc)

	req := &milvuspb.TransferNodeRequest{
		Base: &commonpb.MsgBase{
			MsgID:     1,
			Timestamp: 2,
			TargetID:  3,
		},
		SourceResourceGroup: "rg1",
		TargetResourceGroup: "rg2",
		NumNode:             1,
	}

	task := &TransferNodeTask{
		TransferNodeRequest: req,
		ctx:                 ctx,
		mixCoord:            mixc,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_TransferNode, task.Type())
	assert.Equal(t, UniqueID(1), task.ID())
	assert.Equal(t, Timestamp(2), task.BeginTs())
	assert.Equal(t, Timestamp(2), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.Base.GetSourceID())
	assert.Equal(t, UniqueID(3), task.Base.GetTargetID())

	err := task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, task.result.ErrorCode)
}

func TestTransferReplicaTask(t *testing.T) {
	rc := &MockMixCoordClientInterface{}

	ctx := context.Background()
	InitMetaCache(ctx, rc)
	// make it avoid remote call on rc
	globalMetaCache.GetCollectionSchema(context.Background(), GetCurDBNameFromContextOrDefault(ctx), "collection1")

	req := &milvuspb.TransferReplicaRequest{
		Base: &commonpb.MsgBase{
			MsgID:     1,
			Timestamp: 2,
			TargetID:  3,
		},
		CollectionName:      "collection1",
		SourceResourceGroup: "rg1",
		TargetResourceGroup: "rg2",
		NumReplica:          1,
	}

	task := &TransferReplicaTask{
		TransferReplicaRequest: req,
		ctx:                    ctx,
		mixCoord:               rc,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_TransferReplica, task.Type())
	assert.Equal(t, UniqueID(1), task.ID())
	assert.Equal(t, Timestamp(2), task.BeginTs())
	assert.Equal(t, Timestamp(2), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.Base.GetSourceID())
	assert.Equal(t, UniqueID(3), task.Base.GetTargetID())

	err := task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, task.result.ErrorCode)
}

func TestListResourceGroupsTask(t *testing.T) {
	rc := &MockMixCoordClientInterface{}

	rc.listResourceGroups = func(ctx context.Context, request *milvuspb.ListResourceGroupsRequest) (*milvuspb.ListResourceGroupsResponse, error) {
		return &milvuspb.ListResourceGroupsResponse{
			Status:         merr.Success(),
			ResourceGroups: []string{meta.DefaultResourceGroupName, "rg"},
		}, nil
	}

	ctx := context.Background()
	InitMetaCache(ctx, rc)

	req := &milvuspb.ListResourceGroupsRequest{
		Base: &commonpb.MsgBase{
			MsgID:     1,
			Timestamp: 2,
			TargetID:  3,
		},
	}

	task := &ListResourceGroupsTask{
		ListResourceGroupsRequest: req,
		ctx:                       ctx,
		mixCoord:                  rc,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_ListResourceGroups, task.Type())
	assert.Equal(t, UniqueID(1), task.ID())
	assert.Equal(t, Timestamp(2), task.BeginTs())
	assert.Equal(t, Timestamp(2), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.Base.GetSourceID())
	assert.Equal(t, UniqueID(3), task.Base.GetTargetID())

	err := task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, task.result.GetStatus().GetErrorCode())
	groups := task.result.GetResourceGroups()
	assert.Contains(t, groups, meta.DefaultResourceGroupName)
	assert.Contains(t, groups, "rg")
}

func TestDescribeResourceGroupTask(t *testing.T) {
	rc := &MockMixCoordClientInterface{}
	rc.describeResourceGroup = func(ctx context.Context, request *querypb.DescribeResourceGroupRequest) (*querypb.DescribeResourceGroupResponse, error) {
		return &querypb.DescribeResourceGroupResponse{
			Status: merr.Success(),
			ResourceGroup: &querypb.ResourceGroupInfo{
				Name:             "rg",
				Capacity:         2,
				NumAvailableNode: 1,
				NumOutgoingNode:  map[int64]int32{1: 1},
				NumIncomingNode:  map[int64]int32{2: 2},
			},
		}, nil
	}

	ctx := context.Background()
	InitMetaCache(ctx, rc)
	// make it avoid remote call on rc
	globalMetaCache.GetCollectionSchema(context.Background(), GetCurDBNameFromContextOrDefault(ctx), "collection1")
	globalMetaCache.GetCollectionSchema(context.Background(), GetCurDBNameFromContextOrDefault(ctx), "collection2")

	req := &milvuspb.DescribeResourceGroupRequest{
		Base: &commonpb.MsgBase{
			MsgID:     1,
			Timestamp: 2,
			TargetID:  3,
		},
		ResourceGroup: "rg",
	}

	task := &DescribeResourceGroupTask{
		DescribeResourceGroupRequest: req,
		ctx:                          ctx,
		mixCoord:                     rc,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_DescribeResourceGroup, task.Type())
	assert.Equal(t, UniqueID(1), task.ID())
	assert.Equal(t, Timestamp(2), task.BeginTs())
	assert.Equal(t, Timestamp(2), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.Base.GetSourceID())
	assert.Equal(t, UniqueID(3), task.Base.GetTargetID())

	err := task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_Success, task.result.GetStatus().GetErrorCode())
	groupInfo := task.result.GetResourceGroup()
	outgoingNodeNum := groupInfo.GetNumOutgoingNode()
	incomingNodeNum := groupInfo.GetNumIncomingNode()
	assert.NotNil(t, outgoingNodeNum["collection1"])
	assert.NotNil(t, incomingNodeNum["collection2"])
}

func TestDescribeResourceGroupTaskFailed(t *testing.T) {
	rc := &MockMixCoordClientInterface{}

	rc.describeResourceGroup = func(ctx context.Context, request *querypb.DescribeResourceGroupRequest) (*querypb.DescribeResourceGroupResponse, error) {
		return &querypb.DescribeResourceGroupResponse{
			Status: &commonpb.Status{ErrorCode: commonpb.ErrorCode_UnexpectedError},
		}, nil
	}

	ctx := context.Background()
	InitMetaCache(ctx, rc)
	// make it avoid remote call on rc
	globalMetaCache.GetCollectionSchema(context.Background(), GetCurDBNameFromContextOrDefault(ctx), "collection1")
	globalMetaCache.GetCollectionSchema(context.Background(), GetCurDBNameFromContextOrDefault(ctx), "collection2")

	req := &milvuspb.DescribeResourceGroupRequest{
		Base: &commonpb.MsgBase{
			MsgID:     1,
			Timestamp: 2,
			TargetID:  3,
		},
		ResourceGroup: "rgggg",
	}

	task := &DescribeResourceGroupTask{
		DescribeResourceGroupRequest: req,
		ctx:                          ctx,
		mixCoord:                     rc,
	}
	task.OnEnqueue()
	task.PreExecute(ctx)

	assert.Equal(t, commonpb.MsgType_DescribeResourceGroup, task.Type())
	assert.Equal(t, UniqueID(1), task.ID())
	assert.Equal(t, Timestamp(2), task.BeginTs())
	assert.Equal(t, Timestamp(2), task.EndTs())
	assert.Equal(t, paramtable.GetNodeID(), task.Base.GetSourceID())
	assert.Equal(t, UniqueID(3), task.Base.GetTargetID())

	err := task.Execute(ctx)
	assert.NoError(t, err)
	assert.Equal(t, commonpb.ErrorCode_UnexpectedError, task.result.GetStatus().GetErrorCode())

	rc.describeResourceGroup = func(ctx context.Context, request *querypb.DescribeResourceGroupRequest) (*querypb.DescribeResourceGroupResponse, error) {
		return &querypb.DescribeResourceGroupResponse{
			Status: merr.Success(),
			ResourceGroup: &querypb.ResourceGroupInfo{
				Name:             "rg",
				Capacity:         2,
				NumAvailableNode: 1,
				NumOutgoingNode:  map[int64]int32{3: 1},
				NumIncomingNode:  map[int64]int32{4: 2},
			},
		}, nil
	}

	err = task.Execute(ctx)
	assert.NoError(t, err)
	assert.Len(t, task.result.ResourceGroup.NumOutgoingNode, 0)
	assert.Len(t, task.result.ResourceGroup.NumIncomingNode, 0)
}

func TestCreateCollectionTaskWithPartitionKey(t *testing.T) {
	rc := NewMixCoordMock()
	paramtable.Init()

	defer rc.Close()
	cache := globalMetaCache
	defer func() { globalMetaCache = cache }()
	mockCache := NewMockCache(t)
	mockCache.EXPECT().GetDatabaseInfo(mock.Anything, mock.Anything).Return(&databaseInfo{}, nil).Maybe()
	globalMetaCache = mockCache
	ctx := context.Background()
	shardsNum := common.DefaultShardsNum
	prefix := "TestCreateCollectionTaskWithPartitionKey"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()

	int64Field := &schemapb.FieldSchema{
		Name:         "int64",
		DataType:     schemapb.DataType_Int64,
		IsPrimaryKey: true,
	}
	varCharField := &schemapb.FieldSchema{
		Name:     "varChar",
		DataType: schemapb.DataType_VarChar,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "max_length",
				Value: strconv.Itoa(testMaxVarCharLength),
			},
			{
				Key:   "enable_analyzer",
				Value: "true",
			},
		},
	}
	floatVecField := &schemapb.FieldSchema{
		Name:     "fvec",
		DataType: schemapb.DataType_FloatVector,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   "dim",
				Value: strconv.Itoa(testVecDim),
			},
		},
	}
	sparseVecField := &schemapb.FieldSchema{
		Name:     "sparse",
		DataType: schemapb.DataType_SparseFloatVector,
	}
	partitionKeyField := &schemapb.FieldSchema{
		Name:           "partition_key",
		DataType:       schemapb.DataType_Int64,
		IsPartitionKey: true,
	}
	schema := &schemapb.CollectionSchema{
		Name:   collectionName,
		Fields: []*schemapb.FieldSchema{int64Field, varCharField, partitionKeyField, floatVecField},
	}

	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	task := &createCollectionTask{
		Condition: NewTaskCondition(ctx),
		CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
				Timestamp: Timestamp(time.Now().UnixNano()),
			},
			DbName:         dbName,
			CollectionName: collectionName,
			Schema:         marshaledSchema,
			ShardsNum:      shardsNum,
		},
		ctx:      ctx,
		mixCoord: rc,
		result:   nil,
		schema:   nil,
	}

	t.Run("PreExecute", func(t *testing.T) {
		defer Params.Reset(Params.RootCoordCfg.MaxPartitionNum.Key)
		var err error

		// test default num partitions
		err = task.PreExecute(ctx)
		assert.NoError(t, err)
		assert.Equal(t, common.DefaultPartitionsWithPartitionKey, task.GetNumPartitions())

		Params.Save(Params.RootCoordCfg.MaxPartitionNum.Key, "16")
		task.NumPartitions = 0
		err = task.PreExecute(ctx)
		assert.NoError(t, err)
		assert.Equal(t, int64(16), task.GetNumPartitions())
		Params.Reset(Params.RootCoordCfg.MaxPartitionNum.Key)

		// test specify num partition without partition key field
		partitionKeyField.IsPartitionKey = false
		task.NumPartitions = common.DefaultPartitionsWithPartitionKey * 2
		marshaledSchema, err = proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = marshaledSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		partitionKeyField.IsPartitionKey = true

		// test multi partition key field
		varCharField.IsPartitionKey = true
		marshaledSchema, err = proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = marshaledSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		varCharField.IsPartitionKey = false

		// test partitions < 0
		task.NumPartitions = -2
		marshaledSchema, err = proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = marshaledSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		task.NumPartitions = 1000

		// test partition key type not in [int64, varChar]
		partitionKeyField.DataType = schemapb.DataType_FloatVector
		marshaledSchema, err = proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = marshaledSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		partitionKeyField.DataType = schemapb.DataType_Int64

		// test partition key set nullable == true
		partitionKeyField.Nullable = true
		marshaledSchema, err = proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = marshaledSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		partitionKeyField.DataType = schemapb.DataType_Int64
		partitionKeyField.Nullable = false

		// test partition key field not primary key field
		primaryField, _ := typeutil.GetPrimaryFieldSchema(schema)
		primaryField.IsPartitionKey = true
		marshaledSchema, err = proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = marshaledSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		primaryField.IsPartitionKey = false

		// test partition num too large
		Params.Save(Params.RootCoordCfg.MaxPartitionNum.Key, "16")
		marshaledSchema, err = proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = marshaledSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)
		Params.Reset(Params.RootCoordCfg.MaxPartitionNum.Key)

		marshaledSchema, err = proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = marshaledSchema
		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		// test schema with function
		//	 invalid function
		schema.Functions = []*schemapb.FunctionSchema{
			{Name: "test", Type: schemapb.FunctionType_BM25, InputFieldNames: []string{"invalid name"}},
		}
		marshaledSchema, err = proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = marshaledSchema
		err = task.PreExecute(ctx)
		assert.Error(t, err)

		//   normal case
		schema.Fields = append(schema.Fields, sparseVecField)
		schema.Functions = []*schemapb.FunctionSchema{
			{Name: "test", Type: schemapb.FunctionType_BM25, InputFieldNames: []string{varCharField.Name}, OutputFieldNames: []string{sparseVecField.Name}},
		}
		marshaledSchema, err = proto.Marshal(schema)
		assert.NoError(t, err)
		task.Schema = marshaledSchema
		err = task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("Execute", func(t *testing.T) {
		err = task.Execute(ctx)
		assert.NoError(t, err)

		// check default partitions
		err = InitMetaCache(ctx, rc)
		assert.NoError(t, err)
		partitionNames, err := getDefaultPartitionsInPartitionKeyMode(ctx, "", task.CollectionName)
		assert.NoError(t, err)
		assert.Equal(t, task.GetNumPartitions(), int64(len(partitionNames)))

		createPartitionTask := &createPartitionTask{
			Condition: NewTaskCondition(ctx),
			CreatePartitionRequest: &milvuspb.CreatePartitionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         dbName,
				CollectionName: collectionName,
				PartitionName:  "new_partition",
			},
			ctx:      ctx,
			mixCoord: rc,
		}
		err = createPartitionTask.PreExecute(ctx)
		assert.Error(t, err)

		dropPartitionTask := &dropPartitionTask{
			Condition: NewTaskCondition(ctx),
			DropPartitionRequest: &milvuspb.DropPartitionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         dbName,
				CollectionName: collectionName,
				PartitionName:  "new_partition",
			},
			ctx:      ctx,
			mixCoord: rc,
		}
		err = dropPartitionTask.PreExecute(ctx)
		assert.Error(t, err)

		loadPartitionTask := &loadPartitionsTask{
			Condition: NewTaskCondition(ctx),
			LoadPartitionsRequest: &milvuspb.LoadPartitionsRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         dbName,
				CollectionName: collectionName,
				PartitionNames: []string{"_default_0"},
			},
			ctx: ctx,
		}
		err = loadPartitionTask.PreExecute(ctx)
		assert.Error(t, err)

		releasePartitionsTask := &releasePartitionsTask{
			Condition: NewTaskCondition(ctx),
			ReleasePartitionsRequest: &milvuspb.ReleasePartitionsRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         dbName,
				CollectionName: collectionName,
				PartitionNames: []string{"_default_0"},
			},
			ctx: ctx,
		}
		err = releasePartitionsTask.PreExecute(ctx)
		assert.Error(t, err)
	})
}

func TestPartitionKey(t *testing.T) {
	qc := NewMixCoordMock()
	defer qc.Close()
	ctx := context.Background()

	err := InitMetaCache(ctx, qc)
	assert.NoError(t, err)

	shardsNum := common.DefaultShardsNum
	prefix := "TestInsertTaskWithPartitionKey"
	collectionName := prefix + funcutil.GenRandomStr()

	fieldName2Type := make(map[string]schemapb.DataType)
	fieldName2Type["int64_field"] = schemapb.DataType_Int64
	fieldName2Type["varChar_field"] = schemapb.DataType_VarChar
	fieldName2Type["fvec_field"] = schemapb.DataType_FloatVector
	schema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, "int64_field", false)
	partitionKeyField := &schemapb.FieldSchema{
		Name:           "partition_key_field",
		DataType:       schemapb.DataType_Int64,
		IsPartitionKey: true,
	}
	fieldName2Type["partition_key_field"] = schemapb.DataType_Int64
	schema.Fields = append(schema.Fields, partitionKeyField)
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	createCollectionTask := &createCollectionTask{
		Condition: NewTaskCondition(ctx),
		CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
				Timestamp: Timestamp(time.Now().UnixNano()),
			},
			DbName:         "",
			CollectionName: collectionName,
			Schema:         marshaledSchema,
			ShardsNum:      shardsNum,
			NumPartitions:  common.DefaultPartitionsWithPartitionKey,
		},
		ctx:      ctx,
		mixCoord: qc,
		result:   nil,
		schema:   nil,
	}
	err = createCollectionTask.PreExecute(ctx)
	assert.NoError(t, err)
	err = createCollectionTask.Execute(ctx)
	assert.NoError(t, err)

	collectionID, err := globalMetaCache.GetCollectionID(ctx, GetCurDBNameFromContextOrDefault(ctx), collectionName)
	assert.NoError(t, err)

	dmlChannelsFunc := getDmlChannelsFunc(ctx, qc)
	chMgr := newChannelsMgrImpl(dmlChannelsFunc, nil)
	pchans, err := chMgr.getChannels(collectionID)
	assert.NoError(t, err)

	interval := time.Millisecond * 10
	tso := newMockTsoAllocator()

	ticker := newChannelsTimeTicker(ctx, interval, []string{}, newGetStatisticsFunc(pchans), tso)
	_ = ticker.start()
	defer ticker.close()

	idAllocator, err := allocator.NewIDAllocator(ctx, qc, paramtable.GetNodeID())
	assert.NoError(t, err)
	_ = idAllocator.Start()
	defer idAllocator.Close()

	partitionNames, err := getDefaultPartitionsInPartitionKeyMode(ctx, "", collectionName)
	assert.NoError(t, err)
	assert.Equal(t, common.DefaultPartitionsWithPartitionKey, int64(len(partitionNames)))

	nb := 10
	fieldID := common.StartOfUserFieldID
	fieldDatas := make([]*schemapb.FieldData, 0)
	for fieldName, dataType := range fieldName2Type {
		fieldData := generateFieldData(dataType, fieldName, nb)
		fieldData.FieldId = int64(fieldID)
		fieldDatas = append(fieldDatas, generateFieldData(dataType, fieldName, nb))
		fieldID++
	}

	t.Run("Insert", func(t *testing.T) {
		it := &insertTask{
			insertMsg: &BaseInsertTask{
				BaseMsg: msgstream.BaseMsg{},
				InsertRequest: &msgpb.InsertRequest{
					Base: &commonpb.MsgBase{
						MsgType:  commonpb.MsgType_Insert,
						MsgID:    0,
						SourceID: paramtable.GetNodeID(),
					},
					CollectionName: collectionName,
					FieldsData:     fieldDatas,
					NumRows:        uint64(nb),
					Version:        msgpb.InsertDataVersion_ColumnBased,
				},
			},

			Condition: NewTaskCondition(ctx),
			ctx:       ctx,
			result: &milvuspb.MutationResult{
				Status:       merr.Success(),
				IDs:          nil,
				SuccIndex:    nil,
				ErrIndex:     nil,
				Acknowledged: false,
				InsertCnt:    0,
				DeleteCnt:    0,
				UpsertCnt:    0,
				Timestamp:    0,
			},
			idAllocator: idAllocator,
			chMgr:       chMgr,
			vChannels:   nil,
			pChannels:   nil,
			schema:      nil,
		}

		// don't support specify partition name if use partition key
		it.insertMsg.PartitionName = partitionNames[0]
		assert.Error(t, it.PreExecute(ctx))

		it.insertMsg.PartitionName = ""
		assert.NoError(t, it.OnEnqueue())
		assert.NoError(t, it.PreExecute(ctx))
		assert.NoError(t, it.Execute(ctx))
		assert.NoError(t, it.PostExecute(ctx))
	})

	t.Run("Upsert", func(t *testing.T) {
		hash := testutils.GenerateHashKeys(nb)
		ut := &upsertTask{
			ctx:       ctx,
			Condition: NewTaskCondition(ctx),
			baseMsg: msgstream.BaseMsg{
				HashValues: hash,
			},
			req: &milvuspb.UpsertRequest{
				Base: commonpbutil.NewMsgBase(
					commonpbutil.WithMsgType(commonpb.MsgType_Upsert),
					commonpbutil.WithSourceID(paramtable.GetNodeID()),
				),
				CollectionName: collectionName,
				FieldsData:     fieldDatas,
				NumRows:        uint32(nb),
			},

			result: &milvuspb.MutationResult{
				Status: merr.Success(),
				IDs: &schemapb.IDs{
					IdField: nil,
				},
			},
			idAllocator: idAllocator,
			chMgr:       chMgr,
			chTicker:    ticker,
		}

		// don't support specify partition name if use partition key
		ut.req.PartitionName = partitionNames[0]
		assert.Error(t, ut.PreExecute(ctx))

		ut.req.PartitionName = ""
		assert.NoError(t, ut.OnEnqueue())
		assert.NoError(t, ut.PreExecute(ctx))
		assert.NoError(t, ut.Execute(ctx))
		assert.NoError(t, ut.PostExecute(ctx))
	})

	t.Run("delete", func(t *testing.T) {
		dt := &deleteTask{
			Condition: NewTaskCondition(ctx),
			req: &milvuspb.DeleteRequest{
				CollectionName: collectionName,
				Expr:           "int64_field in [0, 1]",
			},
			ctx: ctx,
			primaryKeys: &schemapb.IDs{
				IdField: &schemapb.IDs_IntId{IntId: &schemapb.LongArray{Data: []int64{0, 1}}},
			},
			idAllocator:  idAllocator,
			chMgr:        chMgr,
			chTicker:     ticker,
			collectionID: collectionID,
			vChannels:    []string{"test-channel"},
		}

		dt.req.PartitionName = ""
		assert.NoError(t, dt.PreExecute(ctx))
		assert.NoError(t, dt.Execute(ctx))
		assert.NoError(t, dt.PostExecute(ctx))
	})

	t.Run("search", func(t *testing.T) {
		searchTask := &searchTask{
			ctx: ctx,
			SearchRequest: &internalpb.SearchRequest{
				Base: &commonpb.MsgBase{},
			},
			request: &milvuspb.SearchRequest{
				CollectionName: collectionName,
				Nq:             1,
			},
			mixCoord: qc,
			tr:       timerecord.NewTimeRecorder("test-search"),
		}

		// don't support specify partition name if use partition key
		searchTask.request.PartitionNames = partitionNames
		err = searchTask.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("query", func(t *testing.T) {
		queryTask := &queryTask{
			ctx: ctx,
			RetrieveRequest: &internalpb.RetrieveRequest{
				QueryLabel: "query",
				Base:       &commonpb.MsgBase{},
			},
			request: &milvuspb.QueryRequest{
				CollectionName: collectionName,
			},
			mixCoord: qc,
		}

		// don't support specify partition name if use partition key
		queryTask.request.PartitionNames = partitionNames
		err = queryTask.PreExecute(ctx)
		assert.Error(t, err)
	})
}

func TestDefaultPartition(t *testing.T) {
	qc := NewMixCoordMock()
	ctx := context.Background()

	err := InitMetaCache(ctx, qc)
	assert.NoError(t, err)

	shardsNum := common.DefaultShardsNum
	prefix := "TestInsertTaskWithPartitionKey"
	collectionName := prefix + funcutil.GenRandomStr()

	fieldName2Type := make(map[string]schemapb.DataType)
	fieldName2Type["int64_field"] = schemapb.DataType_Int64
	fieldName2Type["varChar_field"] = schemapb.DataType_VarChar
	fieldName2Type["fvec_field"] = schemapb.DataType_FloatVector
	schema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, "int64_field", false)
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	t.Run("create collection", func(t *testing.T) {
		createCollectionTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         "",
				CollectionName: collectionName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: qc,
			result:   nil,
			schema:   nil,
		}
		err = createCollectionTask.PreExecute(ctx)
		assert.NoError(t, err)
		err = createCollectionTask.Execute(ctx)
		assert.NoError(t, err)
	})

	collectionID, err := globalMetaCache.GetCollectionID(ctx, GetCurDBNameFromContextOrDefault(ctx), collectionName)
	assert.NoError(t, err)

	dmlChannelsFunc := getDmlChannelsFunc(ctx, qc)
	chMgr := newChannelsMgrImpl(dmlChannelsFunc, nil)

	pchans, err := chMgr.getChannels(collectionID)
	assert.NoError(t, err)

	interval := time.Millisecond * 10
	tso := newMockTsoAllocator()

	ticker := newChannelsTimeTicker(ctx, interval, []string{}, newGetStatisticsFunc(pchans), tso)
	_ = ticker.start()
	defer ticker.close()

	idAllocator, err := allocator.NewIDAllocator(ctx, qc, paramtable.GetNodeID())
	assert.NoError(t, err)
	_ = idAllocator.Start()
	defer idAllocator.Close()

	nb := 10
	fieldID := common.StartOfUserFieldID
	fieldDatas := make([]*schemapb.FieldData, 0)
	for fieldName, dataType := range fieldName2Type {
		fieldData := generateFieldData(dataType, fieldName, nb)
		fieldData.FieldId = int64(fieldID)
		fieldDatas = append(fieldDatas, generateFieldData(dataType, fieldName, nb))
		fieldID++
	}

	t.Run("Insert", func(t *testing.T) {
		it := &insertTask{
			insertMsg: &BaseInsertTask{
				BaseMsg: msgstream.BaseMsg{},
				InsertRequest: &msgpb.InsertRequest{
					Base: &commonpb.MsgBase{
						MsgType:  commonpb.MsgType_Insert,
						MsgID:    0,
						SourceID: paramtable.GetNodeID(),
					},
					CollectionName: collectionName,
					FieldsData:     fieldDatas,
					NumRows:        uint64(nb),
					Version:        msgpb.InsertDataVersion_ColumnBased,
				},
			},

			Condition: NewTaskCondition(ctx),
			ctx:       ctx,
			result: &milvuspb.MutationResult{
				Status:       merr.Success(),
				IDs:          nil,
				SuccIndex:    nil,
				ErrIndex:     nil,
				Acknowledged: false,
				InsertCnt:    0,
				DeleteCnt:    0,
				UpsertCnt:    0,
				Timestamp:    0,
			},
			idAllocator: idAllocator,
			chMgr:       chMgr,
			vChannels:   nil,
			pChannels:   nil,
			schema:      nil,
		}

		it.insertMsg.PartitionName = ""
		assert.NoError(t, it.OnEnqueue())
		assert.NoError(t, it.PreExecute(ctx))
		assert.NoError(t, it.Execute(ctx))
		assert.NoError(t, it.PostExecute(ctx))
	})

	t.Run("Upsert", func(t *testing.T) {
		hash := testutils.GenerateHashKeys(nb)
		ut := &upsertTask{
			ctx:       ctx,
			Condition: NewTaskCondition(ctx),
			baseMsg: msgstream.BaseMsg{
				HashValues: hash,
			},
			req: &milvuspb.UpsertRequest{
				Base: commonpbutil.NewMsgBase(
					commonpbutil.WithMsgType(commonpb.MsgType_Upsert),
					commonpbutil.WithSourceID(paramtable.GetNodeID()),
				),
				CollectionName: collectionName,
				FieldsData:     fieldDatas,
				NumRows:        uint32(nb),
			},

			result: &milvuspb.MutationResult{
				Status: merr.Success(),
				IDs: &schemapb.IDs{
					IdField: nil,
				},
			},
			idAllocator: idAllocator,
			chMgr:       chMgr,
			chTicker:    ticker,
		}

		ut.req.PartitionName = ""
		assert.NoError(t, ut.OnEnqueue())
		assert.NoError(t, ut.PreExecute(ctx))
		assert.NoError(t, ut.Execute(ctx))
		assert.NoError(t, ut.PostExecute(ctx))
	})

	t.Run("delete", func(t *testing.T) {
		dt := &deleteTask{
			Condition: NewTaskCondition(ctx),
			req: &milvuspb.DeleteRequest{
				CollectionName: collectionName,
				Expr:           "int64_field in [0, 1]",
			},
			ctx: ctx,
			primaryKeys: &schemapb.IDs{
				IdField: &schemapb.IDs_IntId{IntId: &schemapb.LongArray{Data: []int64{0, 1}}},
			},
			idAllocator:  idAllocator,
			chMgr:        chMgr,
			chTicker:     ticker,
			collectionID: collectionID,
			vChannels:    []string{"test-channel"},
		}

		dt.req.PartitionName = ""
		assert.NoError(t, dt.PreExecute(ctx))
		assert.NoError(t, dt.Execute(ctx))
		assert.NoError(t, dt.PostExecute(ctx))
	})
}

func TestClusteringKey(t *testing.T) {
	qc := NewMixCoordMock()

	ctx := context.Background()

	err := InitMetaCache(ctx, qc)
	assert.NoError(t, err)

	shardsNum := common.DefaultShardsNum
	prefix := "TestClusteringKey"
	collectionName := prefix + funcutil.GenRandomStr()

	t.Run("create collection normal", func(t *testing.T) {
		fieldName2Type := make(map[string]schemapb.DataType)
		fieldName2Type["int64_field"] = schemapb.DataType_Int64
		fieldName2Type["varChar_field"] = schemapb.DataType_VarChar
		schema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, "int64_field", false)
		fieldName2Type["cluster_key_field"] = schemapb.DataType_Int64
		clusterKeyField := &schemapb.FieldSchema{
			Name:            "cluster_key_field",
			DataType:        schemapb.DataType_Int64,
			IsClusteringKey: true,
		}
		schema.Fields = append(schema.Fields, clusterKeyField)
		vecField := &schemapb.FieldSchema{
			Name:     "fvec_field",
			DataType: schemapb.DataType_FloatVector,
			TypeParams: []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: strconv.Itoa(testVecDim),
				},
			},
		}
		schema.Fields = append(schema.Fields, vecField)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createCollectionTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         "",
				CollectionName: collectionName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: qc,
			result:   nil,
			schema:   nil,
		}
		err = createCollectionTask.PreExecute(ctx)
		assert.NoError(t, err)
		err = createCollectionTask.Execute(ctx)
		assert.NoError(t, err)
	})

	t.Run("create collection not support more than one clustering key", func(t *testing.T) {
		fieldName2Type := make(map[string]schemapb.DataType)
		fieldName2Type["int64_field"] = schemapb.DataType_Int64
		fieldName2Type["varChar_field"] = schemapb.DataType_VarChar
		schema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, "int64_field", false)
		fieldName2Type["cluster_key_field"] = schemapb.DataType_Int64
		clusterKeyField := &schemapb.FieldSchema{
			Name:            "cluster_key_field",
			DataType:        schemapb.DataType_Int64,
			IsClusteringKey: true,
		}
		schema.Fields = append(schema.Fields, clusterKeyField)
		clusterKeyField2 := &schemapb.FieldSchema{
			Name:            "cluster_key_field2",
			DataType:        schemapb.DataType_Int64,
			IsClusteringKey: true,
		}
		schema.Fields = append(schema.Fields, clusterKeyField2)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createCollectionTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         "",
				CollectionName: collectionName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: qc,
			result:   nil,
			schema:   nil,
		}
		err = createCollectionTask.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("create collection with vector clustering key", func(t *testing.T) {
		fieldName2Type := make(map[string]schemapb.DataType)
		fieldName2Type["int64_field"] = schemapb.DataType_Int64
		fieldName2Type["varChar_field"] = schemapb.DataType_VarChar
		schema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, "int64_field", false)
		clusterKeyField := &schemapb.FieldSchema{
			Name:            "vec_field",
			DataType:        schemapb.DataType_FloatVector,
			IsClusteringKey: true,
		}
		schema.Fields = append(schema.Fields, clusterKeyField)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createCollectionTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         "",
				CollectionName: collectionName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: qc,
			result:   nil,
			schema:   nil,
		}
		err = createCollectionTask.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("create collection with json clustering key not supported", func(t *testing.T) {
		fieldName2Type := make(map[string]schemapb.DataType)
		fieldName2Type["int64_field"] = schemapb.DataType_Int64
		fieldName2Type["varChar_field"] = schemapb.DataType_VarChar
		schema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, "int64_field", false)
		jsonField := &schemapb.FieldSchema{
			Name:            "json_field",
			DataType:        schemapb.DataType_JSON,
			IsClusteringKey: true,
		}
		schema.Fields = append(schema.Fields, jsonField)
		vecField := &schemapb.FieldSchema{
			Name:     "fvec_field",
			DataType: schemapb.DataType_FloatVector,
			TypeParams: []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: strconv.Itoa(testVecDim),
				},
			},
		}
		schema.Fields = append(schema.Fields, vecField)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createCollectionTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         "",
				CollectionName: collectionName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: qc,
			result:   nil,
			schema:   nil,
		}
		err = createCollectionTask.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("create collection with bool clustering key not supported", func(t *testing.T) {
		fieldName2Type := make(map[string]schemapb.DataType)
		fieldName2Type["int64_field"] = schemapb.DataType_Int64
		fieldName2Type["varChar_field"] = schemapb.DataType_VarChar
		schema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, "int64_field", false)
		boolField := &schemapb.FieldSchema{
			Name:            "bool_field",
			DataType:        schemapb.DataType_Bool,
			IsClusteringKey: true,
		}
		schema.Fields = append(schema.Fields, boolField)
		vecField := &schemapb.FieldSchema{
			Name:     "fvec_field",
			DataType: schemapb.DataType_FloatVector,
			TypeParams: []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: strconv.Itoa(testVecDim),
				},
			},
		}
		schema.Fields = append(schema.Fields, vecField)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createCollectionTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         "",
				CollectionName: collectionName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: qc,
			result:   nil,
			schema:   nil,
		}
		err = createCollectionTask.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("create collection with array clustering key not supported", func(t *testing.T) {
		fieldName2Type := make(map[string]schemapb.DataType)
		fieldName2Type["int64_field"] = schemapb.DataType_Int64
		fieldName2Type["varChar_field"] = schemapb.DataType_VarChar
		schema := constructCollectionSchemaByDataType(collectionName, fieldName2Type, "int64_field", false)
		arrayField := &schemapb.FieldSchema{
			Name:            "array_field",
			DataType:        schemapb.DataType_Array,
			IsClusteringKey: true,
			ElementType:     schemapb.DataType_Int64,
		}
		schema.Fields = append(schema.Fields, arrayField)
		vecField := &schemapb.FieldSchema{
			Name:     "fvec_field",
			DataType: schemapb.DataType_FloatVector,
			TypeParams: []*commonpb.KeyValuePair{
				{
					Key:   common.DimKey,
					Value: strconv.Itoa(testVecDim),
				},
			},
		}
		schema.Fields = append(schema.Fields, vecField)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createCollectionTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         "",
				CollectionName: collectionName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: qc,
			result:   nil,
			schema:   nil,
		}
		err = createCollectionTask.PreExecute(ctx)
		assert.Error(t, err)
	})
}

func TestAlterCollectionCheckLoaded(t *testing.T) {
	qc := NewMixCoordMock()
	InitMetaCache(context.Background(), qc)
	collectionName := "test_alter_collection_check_loaded"
	createColReq := &milvuspb.CreateCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_DropCollection,
			MsgID:     100,
			Timestamp: 100,
		},
		DbName:         dbName,
		CollectionName: collectionName,
		Schema:         nil,
		ShardsNum:      1,
	}
	qc.CreateCollection(context.Background(), createColReq)
	resp, err := qc.DescribeCollection(context.Background(), &milvuspb.DescribeCollectionRequest{CollectionName: collectionName})
	assert.NoError(t, err)

	qc.ShowLoadCollectionsFunc = func(ctx context.Context, req *querypb.ShowCollectionsRequest, opts ...grpc.CallOption) (*querypb.ShowCollectionsResponse, error) {
		return &querypb.ShowCollectionsResponse{
			Status: &commonpb.Status{
				ErrorCode: commonpb.ErrorCode_Success,
			},
			CollectionIDs:       []int64{resp.CollectionID},
			InMemoryPercentages: []int64{100},
		}, nil
	}

	task := &alterCollectionTask{
		AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
			Base:           &commonpb.MsgBase{},
			CollectionName: collectionName,
			Properties:     []*commonpb.KeyValuePair{{Key: common.MmapEnabledKey, Value: "true"}},
		},
		mixCoord: qc,
	}
	err = task.PreExecute(context.Background())
	assert.Equal(t, merr.Code(merr.ErrCollectionLoaded), merr.Code(err))
}

func TestAlterCollectionTaskValidateTTLAndTTLField(t *testing.T) {
	qc := NewMixCoordMock()
	ctx := context.Background()
	cache := globalMetaCache
	defer func() { globalMetaCache = cache }()
	err := InitMetaCache(ctx, qc)
	assert.NoError(t, err)

	createCollectionWithProps := func(colName string, props []*commonpb.KeyValuePair) {
		schema := &schemapb.CollectionSchema{
			Name:        colName,
			Description: "ttl alter test",
			AutoID:      false,
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "pk", IsPrimaryKey: true, DataType: schemapb.DataType_Int64},
				{FieldID: 101, Name: "ttl", DataType: schemapb.DataType_Timestamptz, Nullable: true},
				{FieldID: 102, Name: "vec", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: common.DimKey, Value: "8"}}},
			},
			Properties: props,
		}
		bs, err := proto.Marshal(schema)
		assert.NoError(t, err)
		_, err = qc.CreateCollection(ctx, &milvuspb.CreateCollectionRequest{
			Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_CreateCollection},
			DbName:         "",
			CollectionName: colName,
			Schema:         bs,
			ShardsNum:      1,
			Properties:     props,
		})
		assert.NoError(t, err)
	}

	t.Run("mutual exclusion: existing ttl.seconds, alter ttl.field should fail", func(t *testing.T) {
		col := "alter_ttl_seconds_then_field_" + funcutil.GenRandomStr()
		createCollectionWithProps(col, []*commonpb.KeyValuePair{{Key: common.CollectionTTLConfigKey, Value: "3600"}})
		task := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: col,
				Properties:     []*commonpb.KeyValuePair{{Key: common.CollectionTTLFieldKey, Value: "ttl"}},
			},
			ctx:      ctx,
			mixCoord: qc,
		}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("mutual exclusion: existing ttl.field, alter ttl.seconds should fail", func(t *testing.T) {
		col := "alter_ttl_field_then_seconds_" + funcutil.GenRandomStr()
		createCollectionWithProps(col, []*commonpb.KeyValuePair{{Key: common.CollectionTTLFieldKey, Value: "ttl"}})
		task := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: col,
				Properties:     []*commonpb.KeyValuePair{{Key: common.CollectionTTLConfigKey, Value: "10"}},
			},
			ctx:      ctx,
			mixCoord: qc,
		}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
	})

	t.Run("ttl.field must exist in schema", func(t *testing.T) {
		col := "alter_ttl_field_invalid_" + funcutil.GenRandomStr()
		createCollectionWithProps(col, nil)
		task := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: col,
				Properties:     []*commonpb.KeyValuePair{{Key: common.CollectionTTLFieldKey, Value: "not_exist"}},
			},
			ctx:      ctx,
			mixCoord: qc,
		}
		assert.Error(t, task.PreExecute(ctx))
	})

	t.Run("ttl.field must be timestamptz", func(t *testing.T) {
		col := "alter_ttl_field_invalid_type_" + funcutil.GenRandomStr()
		createCollectionWithProps(col, nil)
		task := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: col,
				Properties:     []*commonpb.KeyValuePair{{Key: common.CollectionTTLFieldKey, Value: "pk"}},
			},
			ctx:      ctx,
			mixCoord: qc,
		}
		assert.Error(t, task.PreExecute(ctx))
	})

	t.Run("delete ttl.seconds should pass", func(t *testing.T) {
		col := "alter_delete_ttl_seconds_" + funcutil.GenRandomStr()
		createCollectionWithProps(col, []*commonpb.KeyValuePair{{Key: common.CollectionTTLConfigKey, Value: "3600"}})
		task := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: col,
				DeleteKeys:     []string{common.CollectionTTLConfigKey},
			},
			ctx:      ctx,
			mixCoord: qc,
		}
		assert.NoError(t, task.PreExecute(ctx))
	})

	t.Run("delete ttl.field should pass", func(t *testing.T) {
		col := "alter_delete_ttl_field_" + funcutil.GenRandomStr()
		createCollectionWithProps(col, []*commonpb.KeyValuePair{{Key: common.CollectionTTLFieldKey, Value: "ttl"}})
		task := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: col,
				DeleteKeys:     []string{common.CollectionTTLFieldKey},
			},
			ctx:      ctx,
			mixCoord: qc,
		}
		assert.NoError(t, task.PreExecute(ctx))
	})
}

func TestAlterCollectionTaskValidateDescription(t *testing.T) {
	qc := NewMixCoordMock()
	ctx := context.Background()
	cache := globalMetaCache
	defer func() { globalMetaCache = cache }()
	err := InitMetaCache(ctx, qc)
	assert.NoError(t, err)

	maxLen := Params.ProxyCfg.MaxCollectionDescriptionLength.GetAsInt()
	oversized := strings.Repeat("a", maxLen+1)
	differentOversized := strings.Repeat("b", maxLen+1)

	// Create a collection through the mock coordinator directly so we can seed a
	// pre-existing oversized description, which the proxy CreateCollection guard
	// would normally reject. This simulates a collection created before the
	// description length limit existed.
	createCollection := func(description string) string {
		collectionName := "alter_description_" + funcutil.GenRandomStr()
		schema := &schemapb.CollectionSchema{
			Name:        collectionName,
			Description: description,
			AutoID:      false,
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "pk", IsPrimaryKey: true, DataType: schemapb.DataType_Int64},
				{FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: common.DimKey, Value: "8"}}},
			},
		}
		bs, err := proto.Marshal(schema)
		assert.NoError(t, err)
		status, err := qc.CreateCollection(ctx, &milvuspb.CreateCollectionRequest{
			Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_CreateCollection},
			DbName:         dbName,
			CollectionName: collectionName,
			Schema:         bs,
			ShardsNum:      1,
		})
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, status.GetErrorCode())
		return collectionName
	}

	runAlter := func(collectionName string, properties []*commonpb.KeyValuePair) error {
		task := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: collectionName,
				Properties:     properties,
			},
			ctx:      ctx,
			mixCoord: qc,
		}
		return task.PreExecute(ctx)
	}

	// A collection whose stored description is within the limit.
	validCollection := createCollection("short description")
	// A collection whose stored description already exceeds the current limit.
	legacyCollection := createCollection(oversized)

	t.Run("changing a valid description to an oversized one is rejected", func(t *testing.T) {
		err := runAlter(validCollection, []*commonpb.KeyValuePair{
			{Key: common.CollectionDescription, Value: oversized},
		})
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("resending an unchanged oversized description while altering TTL is accepted", func(t *testing.T) {
		err := runAlter(legacyCollection, []*commonpb.KeyValuePair{
			{Key: common.CollectionDescription, Value: oversized},
			{Key: common.CollectionTTLConfigKey, Value: "10"},
		})
		assert.NoError(t, err)
	})

	t.Run("changing an oversized description to a different oversized value is rejected", func(t *testing.T) {
		err := runAlter(legacyCollection, []*commonpb.KeyValuePair{
			{Key: common.CollectionDescription, Value: differentOversized},
		})
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("shrinking an oversized description to a valid value is accepted", func(t *testing.T) {
		err := runAlter(legacyCollection, []*commonpb.KeyValuePair{
			{Key: common.CollectionDescription, Value: "now within the limit"},
		})
		assert.NoError(t, err)
	})

	t.Run("with duplicate description keys, a changed oversized value is still rejected", func(t *testing.T) {
		// The unchanged value is skipped, but the other (changed) oversized value
		// is still validated per-property, so the alter is rejected.
		err := runAlter(legacyCollection, []*commonpb.KeyValuePair{
			{Key: common.CollectionDescription, Value: oversized},
			{Key: common.CollectionDescription, Value: differentOversized},
		})
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})
}

func mockVectorIndexForCollection(t *testing.T, ctx context.Context, qc *MixCoordMock, colName string) {
	t.Helper()

	resp, err := qc.DescribeCollection(ctx, &milvuspb.DescribeCollectionRequest{DbName: dbName, CollectionName: colName})
	assert.NoError(t, err)

	var vecFieldID int64
	for _, field := range resp.Schema.Fields {
		if field.DataType == schemapb.DataType_FloatVector {
			vecFieldID = field.FieldID
			break
		}
	}
	assert.NotEqual(t, int64(0), vecFieldID)

	qc.DescribeIndexFunc = func(ctx context.Context, request *indexpb.DescribeIndexRequest, opts ...grpc.CallOption) (*indexpb.DescribeIndexResponse, error) {
		return &indexpb.DescribeIndexResponse{
			Status: merr.Success(),
			IndexInfos: []*indexpb.IndexInfo{
				{FieldID: vecFieldID},
			},
		}, nil
	}
	t.Cleanup(func() {
		qc.DescribeIndexFunc = nil
	})
}

func TestTaskPartitionKeyIsolation(t *testing.T) {
	qc := NewMixCoordMock()
	ctx := context.Background()
	err := InitMetaCache(ctx, qc)
	assert.NoError(t, err)
	shardsNum := common.DefaultShardsNum
	prefix := "TestPartitionKeyIsolation"
	collectionName := prefix + funcutil.GenRandomStr()

	getSchema := func(colName string, hasPartitionKey bool) *schemapb.CollectionSchema {
		fieldName2Type := make(map[string]schemapb.DataType)
		fieldName2Type["fvec_field"] = schemapb.DataType_FloatVector
		fieldName2Type["varChar_field"] = schemapb.DataType_VarChar
		fieldName2Type["int64_field"] = schemapb.DataType_Int64
		schema := constructCollectionSchemaByDataType(colName, fieldName2Type, "int64_field", false)
		if hasPartitionKey {
			partitionKeyField := &schemapb.FieldSchema{
				Name:           "partition_key_field",
				DataType:       schemapb.DataType_Int64,
				IsPartitionKey: true,
			}
			fieldName2Type["partition_key_field"] = schemapb.DataType_Int64
			schema.Fields = append(schema.Fields, partitionKeyField)
		}
		return schema
	}

	getCollectionTask := func(colName string, isIso bool, marshaledSchema []byte) *createCollectionTask {
		isoStr := "false"
		if isIso {
			isoStr = "true"
		}

		return &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         "",
				CollectionName: colName,
				Schema:         marshaledSchema,
				ShardsNum:      shardsNum,
				Properties:     []*commonpb.KeyValuePair{{Key: common.PartitionKeyIsolationKey, Value: isoStr}},
			},
			ctx:      ctx,
			mixCoord: qc,
			result:   nil,
			schema:   nil,
		}
	}

	createIsoCollection := func(colName string, hasPartitionKey bool, isIsolation bool, isIsoNil bool) {
		isoStr := "false"
		if isIsolation {
			isoStr = "true"
		}
		schema := getSchema(colName, hasPartitionKey)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		createColReq := &milvuspb.CreateCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_DropCollection,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: colName,
			Schema:         marshaledSchema,
			ShardsNum:      1,
			Properties:     []*commonpb.KeyValuePair{{Key: common.PartitionKeyIsolationKey, Value: isoStr}},
		}
		if isIsoNil {
			createColReq.Properties = nil
		}

		stats, err := qc.CreateCollection(ctx, createColReq)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, stats.ErrorCode)
	}

	getAlterCollectionTask := func(colName string, isIsolation bool) *alterCollectionTask {
		isoStr := "false"
		if isIsolation {
			isoStr = "true"
		}

		return &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				Properties:     []*commonpb.KeyValuePair{{Key: common.PartitionKeyIsolationKey, Value: isoStr}},
			},
			mixCoord: qc,
		}
	}

	t.Run("create collection valid", func(t *testing.T) {
		paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("true")
		defer paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("false")
		schema := getSchema(collectionName, true)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createCollectionTask := getCollectionTask(collectionName, true, marshaledSchema)
		err = createCollectionTask.PreExecute(ctx)
		assert.NoError(t, err)
		err = createCollectionTask.Execute(ctx)
		assert.NoError(t, err)
	})

	t.Run("create collection without isolation", func(t *testing.T) {
		schema := getSchema(collectionName, true)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createCollectionTask := getCollectionTask(collectionName, false, marshaledSchema)
		err = createCollectionTask.PreExecute(ctx)
		assert.NoError(t, err)
		err = createCollectionTask.Execute(ctx)
		assert.NoError(t, err)
	})

	t.Run("create collection isolation but no partition key", func(t *testing.T) {
		schema := getSchema(collectionName, false)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createCollectionTask := getCollectionTask(collectionName, true, marshaledSchema)
		assert.ErrorContains(t, createCollectionTask.PreExecute(ctx), "partition key isolation mode is enabled but no partition key field is set")
	})

	t.Run("create collection with isolation and partition key but MV is not enabled", func(t *testing.T) {
		paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("false")
		schema := getSchema(collectionName, true)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)

		createCollectionTask := getCollectionTask(collectionName, true, marshaledSchema)
		assert.ErrorContains(t, createCollectionTask.PreExecute(ctx), "partition key isolation mode is enabled but current Milvus does not support it")
	})

	t.Run("alter collection from valid", func(t *testing.T) {
		paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("true")
		defer paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("false")
		colName := collectionName + "AlterValid"
		createIsoCollection(colName, true, false, false)
		alterTask := getAlterCollectionTask(colName, true)
		err := alterTask.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("alter collection without isolation property should succeed", func(t *testing.T) {
		colName := collectionName + "AlterNoIso"
		createIsoCollection(colName, true, false, true)
		alterTask := alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				Properties:     nil,
			},
			mixCoord: qc,
		}
		err := alterTask.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("alter collection isolation but no partition key", func(t *testing.T) {
		colName := collectionName + "AlterNoPartkey"
		createIsoCollection(colName, false, false, false)
		alterTask := getAlterCollectionTask(colName, true)
		assert.ErrorContains(t, alterTask.PreExecute(ctx), "partition key isolation mode is enabled but no partition key field is set")
	})

	t.Run("alter collection with isolation and partition key but MV is not enabled", func(t *testing.T) {
		paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("false")
		colName := collectionName + "AlterNoMv"
		createIsoCollection(colName, true, false, false)
		alterTask := getAlterCollectionTask(colName, true)
		assert.ErrorContains(t, alterTask.PreExecute(ctx), "partition key isolation mode is enabled but current Milvus does not support it")
	})

	t.Run("alter isolation with vector index should fail", func(t *testing.T) {
		paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("true")
		defer paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("false")
		colName := collectionName + "AlterVecIndex"
		createIsoCollection(colName, true, true, false)
		mockVectorIndexForCollection(t, ctx, qc, colName)
		alterTask := getAlterCollectionTask(colName, false)
		assert.ErrorContains(t, alterTask.PreExecute(ctx),
			"can not alter partition key isolation mode if the collection already has a vector index. Please drop the index first")
	})

	t.Run("delete isolation property with vector index should fail", func(t *testing.T) {
		paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("true")
		defer paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("false")
		colName := collectionName + "DeleteIsoWithIdx"
		createIsoCollection(colName, true, true, false)
		mockVectorIndexForCollection(t, ctx, qc, colName)
		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				DeleteKeys:     []string{common.PartitionKeyIsolationKey},
			},
			mixCoord: qc,
		}
		err = alterTask.PreExecute(ctx)
		assert.ErrorContains(t, err,
			"can not alter partition key isolation mode if the collection already has a vector index. Please drop the index first")
	})

	t.Run("delete isolation property without vector index should succeed", func(t *testing.T) {
		colName := collectionName + "DeleteIsoNoIdx"
		createIsoCollection(colName, true, true, false)
		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				DeleteKeys:     []string{common.PartitionKeyIsolationKey},
			},
			mixCoord: qc,
		}
		err := alterTask.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("alter unrelated property with isolation enabled should not check index", func(t *testing.T) {
		paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("true")
		defer paramtable.Get().CommonCfg.EnableMaterializedView.SwapTempValue("false")
		colName := collectionName + "AlterOtherPropWithIso"
		createIsoCollection(colName, true, true, false)
		mockVectorIndexForCollection(t, ctx, qc, colName)
		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				Properties:     []*commonpb.KeyValuePair{{Key: common.CollectionTTLConfigKey, Value: "3600"}},
			},
			mixCoord: qc,
		}
		err = alterTask.PreExecute(ctx)
		assert.NoError(t, err)
	})
}

func TestAlterCollectionQueryMode(t *testing.T) {
	qc := NewMixCoordMock()
	ctx := context.Background()
	err := InitMetaCache(ctx, qc)
	assert.NoError(t, err)
	prefix := "TestQueryMode"

	getSchema := func(colName string) *schemapb.CollectionSchema {
		fieldName2Type := make(map[string]schemapb.DataType)
		fieldName2Type["fvec_field"] = schemapb.DataType_FloatVector
		fieldName2Type["int64_field"] = schemapb.DataType_Int64
		return constructCollectionSchemaByDataType(colName, fieldName2Type, "int64_field", false)
	}

	createCollection := func(colName string, largeTopKEnabled bool) {
		schema := getSchema(colName)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		props := []*commonpb.KeyValuePair{}
		if largeTopKEnabled {
			props = append(props, &commonpb.KeyValuePair{Key: common.QueryModeKey, Value: common.QueryModeLargeTopK})
		}
		createColReq := &milvuspb.CreateCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_CreateCollection,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: colName,
			Schema:         marshaledSchema,
			ShardsNum:      1,
			Properties:     props,
		}
		stats, err := qc.CreateCollection(ctx, createColReq)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, stats.ErrorCode)
	}

	t.Run("set query_mode to large_topk without vector index", func(t *testing.T) {
		colName := prefix + funcutil.GenRandomStr()
		createCollection(colName, false)
		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				Properties:     []*commonpb.KeyValuePair{{Key: common.QueryModeKey, Value: common.QueryModeLargeTopK}},
			},
			mixCoord: qc,
		}
		err := alterTask.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("delete query_mode from collection without vector index", func(t *testing.T) {
		colName := prefix + funcutil.GenRandomStr()
		createCollection(colName, true)
		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				DeleteKeys:     []string{common.QueryModeKey},
			},
			mixCoord: qc,
		}
		err := alterTask.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("set query_mode to large_topk with vector index should fail", func(t *testing.T) {
		colName := prefix + funcutil.GenRandomStr()
		createCollection(colName, false)
		mockVectorIndexForCollection(t, ctx, qc, colName)
		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				Properties:     []*commonpb.KeyValuePair{{Key: common.QueryModeKey, Value: common.QueryModeLargeTopK}},
			},
			mixCoord: qc,
		}
		err = alterTask.PreExecute(ctx)
		assert.ErrorContains(t, err,
			"can not alter query_mode if the collection already has a vector index. Please drop the index first")
	})

	t.Run("delete query_mode with vector index should fail", func(t *testing.T) {
		colName := prefix + funcutil.GenRandomStr()
		createCollection(colName, true)
		mockVectorIndexForCollection(t, ctx, qc, colName)
		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				DeleteKeys:     []string{common.QueryModeKey},
			},
			mixCoord: qc,
		}
		err = alterTask.PreExecute(ctx)
		assert.ErrorContains(t, err,
			"can not alter query_mode if the collection already has a vector index. Please drop the index first")
	})

	t.Run("delete query_mode property without vector index should succeed", func(t *testing.T) {
		colName := prefix + funcutil.GenRandomStr()
		createCollection(colName, true)
		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				DeleteKeys:     []string{common.QueryModeKey},
			},
			mixCoord: qc,
		}
		err := alterTask.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("alter unrelated property with large_topk query mode should not check index", func(t *testing.T) {
		colName := prefix + funcutil.GenRandomStr()
		createCollection(colName, true)
		mockVectorIndexForCollection(t, ctx, qc, colName)
		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				Properties:     []*commonpb.KeyValuePair{{Key: common.CollectionTTLConfigKey, Value: "3600"}},
			},
			mixCoord: qc,
		}
		err = alterTask.PreExecute(ctx)
		assert.NoError(t, err)
	})
}

func TestCollectionNamespaceShardingEnabledValidation(t *testing.T) {
	qc := NewMixCoordMock()
	ctx := context.Background()
	err := InitMetaCache(ctx, qc)
	assert.NoError(t, err)
	prefix := "TestNamespaceShardingEnabled"

	getSchemaBytes := func(colName string) []byte {
		fieldName2Type := map[string]schemapb.DataType{
			"fvec_field":  schemapb.DataType_FloatVector,
			"int64_field": schemapb.DataType_Int64,
		}
		schema := constructCollectionSchemaByDataType(colName, fieldName2Type, "int64_field", false)
		marshaledSchema, err := proto.Marshal(schema)
		assert.NoError(t, err)
		return marshaledSchema
	}

	t.Run("create rejects invalid namespace.sharding.enabled", func(t *testing.T) {
		colName := prefix + funcutil.GenRandomStr()
		createTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base: &commonpb.MsgBase{
					MsgID:     UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt()),
					Timestamp: Timestamp(time.Now().UnixNano()),
				},
				DbName:         "",
				CollectionName: colName,
				Schema:         getSchemaBytes(colName),
				ShardsNum:      1,
				Properties:     []*commonpb.KeyValuePair{{Key: common.NamespaceShardingEnabledKey, Value: "invalid"}},
			},
			ctx:      ctx,
			mixCoord: qc,
			result:   nil,
			schema:   nil,
		}
		err := createTask.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "invalid namespace.sharding.enabled")
	})

	t.Run("alter rejects namespace.sharding.enabled", func(t *testing.T) {
		colName := prefix + funcutil.GenRandomStr()
		createColReq := &milvuspb.CreateCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_CreateCollection,
				MsgID:     100,
				Timestamp: 100,
			},
			DbName:         dbName,
			CollectionName: colName,
			Schema:         getSchemaBytes(colName),
			ShardsNum:      1,
		}
		stats, err := qc.CreateCollection(ctx, createColReq)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, stats.ErrorCode)

		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				Properties:     []*commonpb.KeyValuePair{{Key: common.NamespaceShardingEnabledKey, Value: "true"}},
			},
			mixCoord: qc,
		}
		err = alterTask.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "cannot alter namespace.sharding.enabled")
	})

	t.Run("alter rejects deleting namespace.sharding.enabled", func(t *testing.T) {
		colName := prefix + funcutil.GenRandomStr()
		createColReq := &milvuspb.CreateCollectionRequest{
			Base: &commonpb.MsgBase{
				MsgType:   commonpb.MsgType_CreateCollection,
				MsgID:     101,
				Timestamp: 101,
			},
			DbName:         dbName,
			CollectionName: colName,
			Schema:         getSchemaBytes(colName),
			ShardsNum:      1,
		}
		stats, err := qc.CreateCollection(ctx, createColReq)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, stats.ErrorCode)

		alterTask := &alterCollectionTask{
			AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: colName,
				DeleteKeys:     []string{common.NamespaceShardingEnabledKey},
			},
			mixCoord: qc,
		}
		err = alterTask.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "cannot delete namespace.sharding.enabled")
	})
}

func TestAlterCollectionFieldCheckLoaded(t *testing.T) {
	qc := NewMixCoordMock()
	InitMetaCache(context.Background(), qc)
	collectionName := "test_alter_collection_field_check_loaded"
	createColReq := &milvuspb.CreateCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_DropCollection,
			MsgID:     100,
			Timestamp: 100,
		},
		DbName:         dbName,
		CollectionName: collectionName,
		Schema:         nil,
		ShardsNum:      1,
	}
	qc.CreateCollection(context.Background(), createColReq)
	resp, err := qc.DescribeCollection(context.Background(), &milvuspb.DescribeCollectionRequest{CollectionName: collectionName})
	assert.NoError(t, err)

	qc.ShowLoadCollectionsFunc = func(ctx context.Context, req *querypb.ShowCollectionsRequest, opts ...grpc.CallOption) (*querypb.ShowCollectionsResponse, error) {
		return &querypb.ShowCollectionsResponse{
			Status:              &commonpb.Status{ErrorCode: commonpb.ErrorCode_Success},
			CollectionIDs:       []int64{resp.CollectionID},
			InMemoryPercentages: []int64{100},
		}, nil
	}

	// update property "mmap.enabled" but the collection is loaded
	task := &alterCollectionFieldTask{
		AlterCollectionFieldRequest: &milvuspb.AlterCollectionFieldRequest{
			Base:           &commonpb.MsgBase{},
			CollectionName: collectionName,
			Properties:     []*commonpb.KeyValuePair{{Key: common.MmapEnabledKey, Value: "true"}},
		},
		mixCoord: qc,
	}
	err = task.PreExecute(context.Background())
	assert.Equal(t, merr.Code(merr.ErrCollectionLoaded), merr.Code(err))

	// delete property "mmap.enabled" but the collection is loaded
	task = &alterCollectionFieldTask{
		AlterCollectionFieldRequest: &milvuspb.AlterCollectionFieldRequest{
			Base:           &commonpb.MsgBase{},
			CollectionName: collectionName,
			DeleteKeys:     []string{common.MmapEnabledKey},
		},
		mixCoord: qc,
	}
	err = task.PreExecute(context.Background())
	assert.Equal(t, merr.Code(merr.ErrCollectionLoaded), merr.Code(err))
}

func TestAlterCollectionField(t *testing.T) {
	paramtable.Init()

	qc := NewMixCoordMock()
	InitMetaCache(context.Background(), qc)
	collectionName := "test_alter_collection_field"

	// Create collection with string and array fields
	schema := &schemapb.CollectionSchema{
		Name: collectionName,
		Fields: []*schemapb.FieldSchema{
			{
				FieldID:    100,
				Name:       "string_field",
				DataType:   schemapb.DataType_VarChar,
				TypeParams: []*commonpb.KeyValuePair{{Key: "max_length", Value: "100"}},
			},
			{
				FieldID:     101,
				Name:        "array_field",
				DataType:    schemapb.DataType_Array,
				ElementType: schemapb.DataType_Int64,
				TypeParams:  []*commonpb.KeyValuePair{{Key: "max_capacity", Value: "100"}},
			},
		},
	}
	schemaBytes, err := proto.Marshal(schema)
	assert.NoError(t, err)

	createColReq := &milvuspb.CreateCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_CreateCollection,
			MsgID:     100,
			Timestamp: 100,
		},
		DbName:         dbName,
		CollectionName: collectionName,
		Schema:         schemaBytes,
		ShardsNum:      1,
	}
	qc.CreateCollection(context.Background(), createColReq)

	// The collection is not loaded
	qc.ShowLoadCollectionsFunc = func(ctx context.Context, req *querypb.ShowCollectionsRequest, opts ...grpc.CallOption) (*querypb.ShowCollectionsResponse, error) {
		return &querypb.ShowCollectionsResponse{
			Status:              &commonpb.Status{ErrorCode: commonpb.ErrorCode_Success},
			CollectionIDs:       []int64{},
			InMemoryPercentages: []int64{},
		}, nil
	}

	// Test cases
	// 1. the collection is not loaded, updating properties is allowed, deleting mmap.enabled/mmap_enabled is allowed
	// 2. max_length can only be updated on varchar field or arrar field with varchar element
	// 3. max_capacity can only be updated on array field
	// 4. invalid number for max_length/max_capacity is not allowed
	// 5. not allow to delete max_length/max_capacity
	tests := []struct {
		name        string
		fieldName   string
		properties  []*commonpb.KeyValuePair
		deleteKeys  []string
		expectError bool
		errCode     int32
	}{
		{
			name:      "update string field max_length",
			fieldName: "string_field",
			properties: []*commonpb.KeyValuePair{
				{Key: common.MaxLengthKey, Value: "200"},
			},
			expectError: false,
		},
		{
			name:      "update array field max_capacity",
			fieldName: "array_field",
			properties: []*commonpb.KeyValuePair{
				{Key: common.MaxCapacityKey, Value: "200"},
			},
			expectError: false,
		},
		{
			name:      "update mmap_enabled",
			fieldName: "string_field",
			properties: []*commonpb.KeyValuePair{
				{Key: common.MmapEnabledKey, Value: "true"},
			},
			expectError: false,
		},
		{
			name:      "invalid property key",
			fieldName: "string_field",
			properties: []*commonpb.KeyValuePair{
				{Key: "invalid_key", Value: "value"},
			},
			expectError: true,
			errCode:     merr.Code(merr.ErrParameterInvalid),
		},
		{
			name:      "invalid max_length value type",
			fieldName: "string_field",
			properties: []*commonpb.KeyValuePair{
				{Key: common.MaxLengthKey, Value: "not_a_number"},
			},
			expectError: true,
			errCode:     merr.Code(merr.ErrParameterInvalid),
		},
		{
			name:      "invalid max_capacity value type",
			fieldName: "array_field",
			properties: []*commonpb.KeyValuePair{
				{Key: common.MaxCapacityKey, Value: "not_a_number"},
			},
			expectError: true,
			errCode:     merr.Code(merr.ErrParameterInvalid),
		},
		{
			name:      "max_length exceeds limit",
			fieldName: "string_field",
			properties: []*commonpb.KeyValuePair{
				{Key: common.MaxLengthKey, Value: "65536"},
			},
			expectError: true,
			errCode:     merr.Code(merr.ErrParameterInvalid),
		},
		{
			name:      "max_capacity exceeds limit",
			fieldName: "array_field",
			properties: []*commonpb.KeyValuePair{
				{Key: common.MaxCapacityKey, Value: "5000"},
			},
			expectError: true,
			errCode:     merr.Code(merr.ErrParameterInvalid),
		},
		{
			name:      "max_capacity invalid range",
			fieldName: "array_field",
			properties: []*commonpb.KeyValuePair{
				{Key: common.MaxCapacityKey, Value: "0"},
			},
			expectError: true,
			errCode:     merr.Code(merr.ErrParameterInvalid),
		},
		{
			name:      "max_capacity invalid type",
			fieldName: "string_field",
			properties: []*commonpb.KeyValuePair{
				{Key: common.MaxCapacityKey, Value: "3"},
			},
			expectError: true,
			errCode:     merr.Code(merr.ErrParameterInvalid),
		},
		{
			name:      "not allow to update max_length on non-varchar field",
			fieldName: "array_field",
			properties: []*commonpb.KeyValuePair{
				{Key: common.MaxLengthKey, Value: "10"},
			},
			expectError: true,
			errCode:     merr.Code(merr.ErrParameterInvalid),
		},
		{
			name:        "delete mmap.enabled is allowed",
			fieldName:   "string_field",
			deleteKeys:  []string{common.MmapEnabledKey},
			expectError: false,
		},
		{
			name:        "delete mmap_enabled is allowed",
			fieldName:   "string_field",
			deleteKeys:  []string{MmapEnabledKey},
			expectError: false,
		},
		{
			name:        "delete max_length is not allowed",
			fieldName:   "string_field",
			deleteKeys:  []string{common.MaxLengthKey},
			expectError: true,
			errCode:     merr.Code(merr.ErrParameterInvalid),
		},
		{
			name:        "delete max_capacity is not allowed",
			fieldName:   "array_field",
			deleteKeys:  []string{common.MaxCapacityKey},
			expectError: true,
			errCode:     merr.Code(merr.ErrParameterInvalid),
		},
	}

	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			task := &alterCollectionFieldTask{
				AlterCollectionFieldRequest: &milvuspb.AlterCollectionFieldRequest{
					Base:           &commonpb.MsgBase{},
					CollectionName: collectionName,
					FieldName:      test.fieldName,
					Properties:     test.properties,
					DeleteKeys:     test.deleteKeys,
				},
				mixCoord: qc,
			}

			err := task.PreExecute(context.Background())
			if test.expectError {
				assert.Error(t, err)
				if test.errCode != 0 {
					assert.Equal(t, test.errCode, merr.Code(err))
				}
			} else {
				assert.NoError(t, err)
			}
		})
	}

	t.Run("update array field max_capacity with custom limit", func(t *testing.T) {
		err := paramtable.Get().Save(paramtable.Get().ProxyCfg.MaxArrayCapacity.Key, "5000")
		assert.NoError(t, err)
		defer paramtable.Get().Reset(paramtable.Get().ProxyCfg.MaxArrayCapacity.Key)

		task := &alterCollectionFieldTask{
			AlterCollectionFieldRequest: &milvuspb.AlterCollectionFieldRequest{
				Base:           &commonpb.MsgBase{},
				CollectionName: collectionName,
				FieldName:      "array_field",
				Properties: []*commonpb.KeyValuePair{
					{Key: common.MaxCapacityKey, Value: "5000"},
				},
			},
			mixCoord: qc,
		}

		err = task.PreExecute(context.Background())
		assert.NoError(t, err)
	})
}

// constructCollectionSchemaWithStructArrayField constructs a collection schema specifically for testing StructArrayField
func constructCollectionSchemaWithStructArrayField(collectionName string, structArrayFieldName string, autoID bool) *schemapb.CollectionSchema {
	// Primary key field
	pkField := &schemapb.FieldSchema{
		FieldID:      100,
		Name:         testInt64Field,
		IsPrimaryKey: true,
		Description:  "primary key field",
		DataType:     schemapb.DataType_Int64,
		AutoID:       autoID,
	}

	// Vector field
	vecField := &schemapb.FieldSchema{
		FieldID:      101,
		Name:         testFloatVecField,
		IsPrimaryKey: false,
		Description:  "float vector field",
		DataType:     schemapb.DataType_FloatVector,
		TypeParams: []*commonpb.KeyValuePair{
			{
				Key:   common.DimKey,
				Value: strconv.Itoa(testVecDim),
			},
		},
	}

	// StructArrayField with various sub-fields for comprehensive testing
	structArrayField := &schemapb.StructArrayFieldSchema{
		FieldID:     102,
		Name:        structArrayFieldName,
		Description: "struct array field for testing",
		Fields: []*schemapb.FieldSchema{
			{
				FieldID:     1021,
				Name:        "sub_text_array",
				DataType:    schemapb.DataType_Array,
				ElementType: schemapb.DataType_VarChar,
				TypeParams: []*commonpb.KeyValuePair{
					{
						Key:   common.MaxLengthKey,
						Value: strconv.Itoa(testMaxVarCharLength),
					},
					{
						Key:   common.MaxCapacityKey,
						Value: "50",
					},
				},
			},
			{
				FieldID:     1022,
				Name:        "sub_int_array",
				DataType:    schemapb.DataType_Array,
				ElementType: schemapb.DataType_Int32,
				TypeParams: []*commonpb.KeyValuePair{
					{
						Key:   common.MaxCapacityKey,
						Value: "50",
					},
				},
			},
			{
				FieldID:     1023,
				Name:        "sub_float_vector_array",
				DataType:    schemapb.DataType_ArrayOfVector,
				ElementType: schemapb.DataType_FloatVector,
				TypeParams: []*commonpb.KeyValuePair{
					{
						Key:   common.DimKey,
						Value: strconv.Itoa(testVecDim),
					},
					{
						Key:   common.MaxCapacityKey,
						Value: "50",
					},
				},
			},
		},
	}

	return &schemapb.CollectionSchema{
		Name:              collectionName,
		Description:       "test collection with struct array field",
		AutoID:            autoID,
		Fields:            []*schemapb.FieldSchema{pkField, vecField},
		StructArrayFields: []*schemapb.StructArrayFieldSchema{structArrayField},
	}
}

// TestCreateCollectionTaskWithStructArrayField tests creating collections with StructArrayField
func TestCreateCollectionTaskWithStructArrayField(t *testing.T) {
	mix := NewMixCoordMock()
	cache := globalMetaCache
	defer func() { globalMetaCache = cache }()
	mockCache := NewMockCache(t)
	mockCache.EXPECT().GetDatabaseInfo(mock.Anything, mock.Anything).Return(&databaseInfo{}, nil).Maybe()
	globalMetaCache = mockCache
	ctx := context.Background()
	shardsNum := common.DefaultShardsNum
	prefix := "TestCreateCollectionTaskWithStructArrayField"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()

	// Test with StructArrayField
	schema := constructCollectionSchemaWithStructArrayField(collectionName, testStructArrayField, false)
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	task := &createCollectionTask{
		Condition: NewTaskCondition(ctx),
		CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
			Base:           nil,
			DbName:         dbName,
			CollectionName: collectionName,
			Schema:         marshaledSchema,
			ShardsNum:      shardsNum,
		},
		ctx:      ctx,
		mixCoord: mix,
		result:   nil,
		schema:   nil,
	}

	t.Run("create collection with struct array field", func(t *testing.T) {
		err := task.OnEnqueue()
		assert.NoError(t, err)

		err = task.PreExecute(ctx)
		assert.NoError(t, err)

		// Verify schema contains StructArrayFields
		assert.NotNil(t, task.schema)
		assert.Len(t, task.schema.StructArrayFields, 1)

		structArrayField := task.schema.StructArrayFields[0]
		assert.Equal(t, testStructArrayField, structArrayField.Name)
		assert.Len(t, structArrayField.Fields, 3)

		// Verify sub-fields in StructArrayField have been transformed to structName[fieldName] format
		subFields := structArrayField.Fields

		// After PreExecute, field names should be transformed to structName[fieldName] format
		// sub_text_array -> testStructArrayField[sub_text_array]
		assert.Equal(t, fmt.Sprintf("%s[sub_text_array]", testStructArrayField), subFields[0].Name)
		assert.Equal(t, schemapb.DataType_Array, subFields[0].DataType)
		assert.Equal(t, schemapb.DataType_VarChar, subFields[0].ElementType)

		// sub_int_array -> testStructArrayField[sub_int_array]
		assert.Equal(t, fmt.Sprintf("%s[sub_int_array]", testStructArrayField), subFields[1].Name)
		assert.Equal(t, schemapb.DataType_Array, subFields[1].DataType)
		assert.Equal(t, schemapb.DataType_Int32, subFields[1].ElementType)

		// sub_float_vector_array -> testStructArrayField[sub_float_vector_array]
		assert.Equal(t, fmt.Sprintf("%s[sub_float_vector_array]", testStructArrayField), subFields[2].Name)
		assert.Equal(t, schemapb.DataType_ArrayOfVector, subFields[2].DataType)
		assert.Equal(t, schemapb.DataType_FloatVector, subFields[2].ElementType)

		err = task.Execute(ctx)
		assert.NoError(t, err)
		assert.Equal(t, commonpb.ErrorCode_Success, task.result.ErrorCode)

		err = task.PostExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("test struct field name transformation with duplicate field names", func(t *testing.T) {
		// Create a schema with multiple structs having the same sub-field names
		schemaWithDuplicateNames := &schemapb.CollectionSchema{
			Name: collectionName + "_duplicate_names",
			Fields: []*schemapb.FieldSchema{
				{
					FieldID:      100,
					Name:         testInt64Field,
					IsPrimaryKey: true,
					DataType:     schemapb.DataType_Int64,
					AutoID:       false,
				},
				{
					FieldID:  101,
					Name:     testFloatVecField,
					DataType: schemapb.DataType_FloatVector,
					TypeParams: []*commonpb.KeyValuePair{
						{
							Key:   common.DimKey,
							Value: strconv.Itoa(testVecDim),
						},
					},
				},
			},
			StructArrayFields: []*schemapb.StructArrayFieldSchema{
				{
					FieldID:     102,
					Name:        "struct1",
					Description: "first struct",
					Fields: []*schemapb.FieldSchema{
						{
							FieldID:     1021,
							Name:        "field_name", // Duplicate name
							DataType:    schemapb.DataType_Array,
							ElementType: schemapb.DataType_Int32,
							TypeParams: []*commonpb.KeyValuePair{
								{
									Key:   common.MaxCapacityKey,
									Value: "100",
								},
							},
						},
						{
							FieldID:     1022,
							Name:        "common_field", // Another duplicate name
							DataType:    schemapb.DataType_Array,
							ElementType: schemapb.DataType_VarChar,
							TypeParams: []*commonpb.KeyValuePair{
								{
									Key:   common.MaxLengthKey,
									Value: "100",
								},
								{
									Key:   common.MaxCapacityKey,
									Value: "100",
								},
							},
						},
					},
				},
				{
					FieldID:     103,
					Name:        "struct2",
					Description: "second struct",
					Fields: []*schemapb.FieldSchema{
						{
							FieldID:     1031,
							Name:        "field_name", // Same name as struct1's field
							DataType:    schemapb.DataType_Array,
							ElementType: schemapb.DataType_Float,
							TypeParams: []*commonpb.KeyValuePair{
								{
									Key:   common.MaxCapacityKey,
									Value: "100",
								},
							},
						},
						{
							FieldID:     1032,
							Name:        "common_field", // Same name as struct1's field
							DataType:    schemapb.DataType_Array,
							ElementType: schemapb.DataType_Bool,
							TypeParams: []*commonpb.KeyValuePair{
								{
									Key:   common.MaxCapacityKey,
									Value: "100",
								},
							},
						},
					},
				},
			},
		}

		marshaledDuplicateSchema, err := proto.Marshal(schemaWithDuplicateNames)
		assert.NoError(t, err)

		duplicateTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base:           nil,
				DbName:         dbName,
				CollectionName: collectionName + "_duplicate_names",
				Schema:         marshaledDuplicateSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: mix,
			result:   nil,
			schema:   nil,
		}

		err = duplicateTask.OnEnqueue()
		assert.NoError(t, err)

		// PreExecute should succeed and transform the field names
		err = duplicateTask.PreExecute(ctx)
		assert.NoError(t, err)

		// Verify that field names have been transformed to avoid conflicts
		assert.NotNil(t, duplicateTask.schema)
		assert.Len(t, duplicateTask.schema.StructArrayFields, 2)

		// Check struct1's fields
		struct1 := duplicateTask.schema.StructArrayFields[0]
		assert.Equal(t, "struct1", struct1.Name)
		assert.Equal(t, "struct1[field_name]", struct1.Fields[0].Name)
		assert.Equal(t, "struct1[common_field]", struct1.Fields[1].Name)

		// Check struct2's fields
		struct2 := duplicateTask.schema.StructArrayFields[1]
		assert.Equal(t, "struct2", struct2.Name)
		assert.Equal(t, "struct2[field_name]", struct2.Fields[0].Name)
		assert.Equal(t, "struct2[common_field]", struct2.Fields[1].Name)

		// Verify that despite having the same original names, the transformed names are unique
		allFieldNames := make(map[string]bool)
		for _, structField := range duplicateTask.schema.StructArrayFields {
			for _, field := range structField.Fields {
				// Each transformed name should be unique
				assert.False(t, allFieldNames[field.Name], "Duplicate field name found: %s", field.Name)
				allFieldNames[field.Name] = true
			}
		}
	})

	t.Run("validate struct array field constraints", func(t *testing.T) {
		// Test invalid sub-field in StructArrayField
		invalidSchema := constructCollectionSchemaWithStructArrayField(collectionName+"_invalid", testStructArrayField, false)

		// Add an invalid sub-field (nested array)
		invalidSubField := &schemapb.FieldSchema{
			FieldID:     1024,
			Name:        "invalid_nested_array",
			DataType:    schemapb.DataType_Array,
			ElementType: schemapb.DataType_Array, // This should be invalid - nested arrays
		}
		invalidSchema.StructArrayFields[0].Fields = append(invalidSchema.StructArrayFields[0].Fields, invalidSubField)

		invalidMarshaledSchema, err := proto.Marshal(invalidSchema)
		assert.NoError(t, err)

		invalidTask := &createCollectionTask{
			Condition: NewTaskCondition(ctx),
			CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
				Base:           nil,
				DbName:         dbName,
				CollectionName: collectionName + "_invalid",
				Schema:         invalidMarshaledSchema,
				ShardsNum:      shardsNum,
			},
			ctx:      ctx,
			mixCoord: mix,
			result:   nil,
			schema:   nil,
		}

		err = invalidTask.OnEnqueue()
		assert.NoError(t, err)

		err = invalidTask.PreExecute(ctx)
		assert.Error(t, err) // Should fail due to nested array validation
	})
}

// TestDescribeCollectionTaskWithStructArrayField tests describing collections with StructArrayField
func TestDescribeCollectionTaskWithStructArrayField(t *testing.T) {
	mix := NewMixCoordMock()
	ctx := context.Background()
	prefix := "TestDescribeCollectionTaskWithStructArrayField"
	collectionName := prefix + funcutil.GenRandomStr()

	// Create collection with StructArrayField first
	schema := constructCollectionSchemaWithStructArrayField(collectionName, testStructArrayField, true)
	marshaledSchema, err := proto.Marshal(schema)
	assert.NoError(t, err)

	createTask := &createCollectionTask{
		Condition: NewTaskCondition(ctx),
		CreateCollectionRequest: &milvuspb.CreateCollectionRequest{
			CollectionName: collectionName,
			Schema:         marshaledSchema,
		},
		ctx:      ctx,
		mixCoord: mix,
	}

	err = createTask.OnEnqueue()
	assert.NoError(t, err)
	err = createTask.PreExecute(ctx)
	assert.NoError(t, err)
	err = createTask.Execute(ctx)
	assert.NoError(t, err)

	// Now test describe collection
	describeTask := &describeCollectionTask{
		Condition: NewTaskCondition(ctx),
		DescribeCollectionRequest: &milvuspb.DescribeCollectionRequest{
			CollectionName: collectionName,
		},
		ctx:      ctx,
		mixCoord: mix,
	}

	t.Run("describe collection with struct array field", func(t *testing.T) {
		err := describeTask.PreExecute(ctx)
		assert.NoError(t, err)

		err = describeTask.Execute(ctx)
		assert.NoError(t, err)
		assert.NotNil(t, describeTask.result)
		assert.Equal(t, commonpb.ErrorCode_Success, describeTask.result.Status.ErrorCode)

		// Verify StructArrayFields are returned in describe response
		resultSchema := describeTask.result.Schema
		assert.NotNil(t, resultSchema)
		assert.Len(t, resultSchema.StructArrayFields, 1)

		structArrayField := resultSchema.StructArrayFields[0]
		assert.Equal(t, testStructArrayField, structArrayField.Name)
		assert.Len(t, structArrayField.Fields, 3)

		err = describeTask.PostExecute(ctx)
		assert.NoError(t, err)
	})
}

func TestAlterCollection_AllowInsertAutoID_AutoIDFalse(t *testing.T) {
	qc := NewMixCoordMock()
	InitMetaCache(context.Background(), qc)
	ctx := context.Background()
	collectionName := "test_alter_allow_insert_autoid_autoid_false"

	schema := constructCollectionSchemaWithStructArrayField(collectionName, testStructArrayField, false)
	schemaBytes, err := proto.Marshal(schema)
	assert.NoError(t, err)

	createColReq := &milvuspb.CreateCollectionRequest{
		Base: &commonpb.MsgBase{
			MsgType:   commonpb.MsgType_CreateCollection,
			MsgID:     200,
			Timestamp: 200,
		},
		DbName:         dbName,
		CollectionName: collectionName,
		Schema:         schemaBytes,
		ShardsNum:      1,
	}
	qc.CreateCollection(ctx, createColReq)

	task := &alterCollectionTask{
		AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
			Base:           &commonpb.MsgBase{},
			CollectionName: collectionName,
			Properties: []*commonpb.KeyValuePair{
				{Key: common.AllowInsertAutoIDKey, Value: "true"},
			},
		},
		mixCoord: qc,
	}

	err = task.PreExecute(ctx)
	assert.Error(t, err)
	assert.Equal(t, merr.Code(merr.ErrParameterInvalid), merr.Code(err))
}

func TestHighlightTask(t *testing.T) {
	paramtable.Init()
	ctx := context.Background()

	t.Run("basic methods", func(t *testing.T) {
		task := &HighlightTask{
			ctx: ctx,
			GetHighlightRequest: &querypb.GetHighlightRequest{
				Base: commonpbutil.NewMsgBase(),
			},
			Condition: NewTaskCondition(ctx),
		}

		t.Run("traceCtx", func(t *testing.T) {
			traceCtx := task.TraceCtx()
			assert.NotNil(t, traceCtx)
			assert.Equal(t, ctx, traceCtx)
		})

		t.Run("id", func(t *testing.T) {
			id := UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt())
			task.SetID(id)
			assert.Equal(t, id, task.ID())
		})

		t.Run("name", func(t *testing.T) {
			assert.Equal(t, HighlightTaskName, task.Name())
		})

		t.Run("type", func(t *testing.T) {
			assert.Equal(t, commonpb.MsgType_Undefined, task.Type())
		})

		t.Run("ts", func(t *testing.T) {
			ts := Timestamp(time.Now().UnixNano())
			task.SetTs(ts)
			assert.Equal(t, ts, task.BeginTs())
			assert.Equal(t, ts, task.EndTs())
		})
	})

	t.Run("OnEnqueue", func(t *testing.T) {
		task := &HighlightTask{
			ctx:                 ctx,
			GetHighlightRequest: &querypb.GetHighlightRequest{},
			Condition:           NewTaskCondition(ctx),
		}

		err := task.OnEnqueue()
		assert.NoError(t, err)
		assert.NotNil(t, task.Base)
		assert.Equal(t, commonpb.MsgType_Undefined, task.Base.MsgType)
		assert.Equal(t, paramtable.GetNodeID(), task.Base.SourceID)
	})

	t.Run("PreExecute", func(t *testing.T) {
		task := &HighlightTask{
			ctx: ctx,
			GetHighlightRequest: &querypb.GetHighlightRequest{
				Base: commonpbutil.NewMsgBase(),
			},
			Condition: NewTaskCondition(ctx),
		}

		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("getHighlightOnShardleader success", func(t *testing.T) {
		task := &HighlightTask{
			ctx: ctx,
			GetHighlightRequest: &querypb.GetHighlightRequest{
				Base:  commonpbutil.NewMsgBase(),
				Topks: []int64{10},
				Tasks: []*querypb.HighlightTask{
					{},
				},
			},
			Condition: NewTaskCondition(ctx),
		}

		mockQN := mocks.NewMockQueryNodeClient(t)
		expectedResp := &querypb.GetHighlightResponse{
			Status: merr.Success(),
			Results: []*querypb.HighlightResult{
				{
					Fragments: []*querypb.HighlightFragment{
						{
							StartOffset: 0,
							EndOffset:   10,
							Offsets:     []int64{0, 5, 5, 10},
						},
					},
				},
			},
		}

		mockQN.EXPECT().GetHighlight(mock.Anything, mock.Anything).Return(expectedResp, nil)

		err := task.getHighlightOnShardleader(ctx, 1, mockQN, "test_channel")
		assert.NoError(t, err)
		assert.NotNil(t, task.result)
		assert.Equal(t, expectedResp, task.result)
		assert.Equal(t, "test_channel", task.Channel)
	})

	t.Run("getHighlightOnShardleader rpc error", func(t *testing.T) {
		task := &HighlightTask{
			ctx: ctx,
			GetHighlightRequest: &querypb.GetHighlightRequest{
				Base: commonpbutil.NewMsgBase(),
			},
			Condition: NewTaskCondition(ctx),
		}

		mockQN := mocks.NewMockQueryNodeClient(t)
		mockQN.EXPECT().GetHighlight(mock.Anything, mock.Anything).Return(nil, errors.New("rpc error"))

		err := task.getHighlightOnShardleader(ctx, 1, mockQN, "test_channel")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "rpc error")
	})

	t.Run("getHighlightOnShardleader status error", func(t *testing.T) {
		task := &HighlightTask{
			ctx: ctx,
			GetHighlightRequest: &querypb.GetHighlightRequest{
				Base: commonpbutil.NewMsgBase(),
			},
			Condition: NewTaskCondition(ctx),
		}

		mockQN := mocks.NewMockQueryNodeClient(t)
		expectedResp := &querypb.GetHighlightResponse{
			Status: merr.Status(errors.New("status error")),
		}

		mockQN.EXPECT().GetHighlight(mock.Anything, mock.Anything).Return(expectedResp, nil)

		err := task.getHighlightOnShardleader(ctx, 1, mockQN, "test_channel")
		assert.Error(t, err)
	})

	t.Run("Execute success", func(t *testing.T) {
		task := &HighlightTask{
			ctx:            ctx,
			collectionName: "test_collection",
			collectionID:   100,
			dbName:         "default",
			GetHighlightRequest: &querypb.GetHighlightRequest{
				Base:  commonpbutil.NewMsgBase(),
				Topks: []int64{10, 20},
				Tasks: []*querypb.HighlightTask{
					{},
					{},
				},
			},
			Condition: NewTaskCondition(ctx),
		}

		mockLB := shardclient.NewMockLBPolicy(t)
		mockQN := mocks.NewMockQueryNodeClient(t)

		expectedResp := &querypb.GetHighlightResponse{
			Status: merr.Success(),
			Results: []*querypb.HighlightResult{
				{
					Fragments: []*querypb.HighlightFragment{
						{
							StartOffset: 0,
							EndOffset:   10,
							Offsets:     []int64{0, 5, 5, 10},
						},
					},
				},
			},
		}

		mockQN.EXPECT().GetHighlight(mock.Anything, mock.Anything).Return(expectedResp, nil)

		mockLB.EXPECT().ExecuteOneChannel(mock.Anything, mock.Anything).Run(
			func(ctx context.Context, workload shardclient.CollectionWorkLoad) {
				assert.Equal(t, "default", workload.Db)
				assert.Equal(t, "test_collection", workload.CollectionName)
				assert.Equal(t, int64(100), workload.CollectionID)
				assert.Equal(t, int64(4), workload.Nq) // len(topks) * len(tasks) = 2 * 2 = 4
				err := workload.Exec(ctx, 1, mockQN, "test_channel")
				assert.NoError(t, err)
			},
		).Return(nil)

		task.lb = mockLB

		err := task.Execute(ctx)
		assert.NoError(t, err)
		assert.NotNil(t, task.result)
	})

	t.Run("Execute lb error", func(t *testing.T) {
		task := &HighlightTask{
			ctx:            ctx,
			collectionName: "test_collection",
			collectionID:   100,
			dbName:         "default",
			GetHighlightRequest: &querypb.GetHighlightRequest{
				Base: commonpbutil.NewMsgBase(),
			},
			Condition: NewTaskCondition(ctx),
		}

		mockLB := shardclient.NewMockLBPolicy(t)
		mockLB.EXPECT().ExecuteOneChannel(mock.Anything, mock.Anything).Return(errors.New("lb error"))

		task.lb = mockLB

		err := task.Execute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "lb error")
	})

	t.Run("PostExecute", func(t *testing.T) {
		task := &HighlightTask{
			ctx: ctx,
			GetHighlightRequest: &querypb.GetHighlightRequest{
				Base: commonpbutil.NewMsgBase(),
			},
			Condition: NewTaskCondition(ctx),
		}

		err := task.PostExecute(ctx)
		assert.NoError(t, err)
	})
}

func TestValidateCollectionTTL(t *testing.T) {
	cases := []struct {
		name      string
		value     string
		hasTTL    bool
		expectErr bool
	}{
		{"at_min_boundary", "-1", true, false},         // val <= -1
		{"out_of_lower_boundary", "-2", true, true},    // val < -1
		{"exceed_max", "3155760001", true, true},       // val > MaxTTLSeconds
		{"at_max_boundary", "3155760000", true, false}, // val == MaxTTLSeconds
		{"valid_value", "3600", true, false},
		{"min_valid", "1", true, false},
		{"invalid_format", "abc", true, true},
	}

	for _, c := range cases {
		t.Run(c.name, func(t *testing.T) {
			hasTTL, err := validateCollectionTTL([]*commonpb.KeyValuePair{{Key: common.CollectionTTLConfigKey, Value: c.value}})
			assert.Equal(t, c.hasTTL, hasTTL)
			if c.expectErr {
				assert.Error(t, err)
			} else {
				assert.NoError(t, err)
			}
		})
	}
}

func TestHasWarmupProp(t *testing.T) {
	t.Run("has generic warmup key", func(t *testing.T) {
		props := []*commonpb.KeyValuePair{
			{Key: common.WarmupKey, Value: common.WarmupSync},
		}
		assert.True(t, hasWarmupProp(props...))
	})

	t.Run("has scalar field warmup key", func(t *testing.T) {
		props := []*commonpb.KeyValuePair{
			{Key: common.WarmupScalarFieldKey, Value: common.WarmupDisable},
		}
		assert.True(t, hasWarmupProp(props...))
	})

	t.Run("has scalar index warmup key", func(t *testing.T) {
		props := []*commonpb.KeyValuePair{
			{Key: common.WarmupScalarIndexKey, Value: common.WarmupSync},
		}
		assert.True(t, hasWarmupProp(props...))
	})

	t.Run("has vector field warmup key", func(t *testing.T) {
		props := []*commonpb.KeyValuePair{
			{Key: common.WarmupVectorFieldKey, Value: common.WarmupDisable},
		}
		assert.True(t, hasWarmupProp(props...))
	})

	t.Run("has vector index warmup key", func(t *testing.T) {
		props := []*commonpb.KeyValuePair{
			{Key: common.WarmupVectorIndexKey, Value: common.WarmupSync},
		}
		assert.True(t, hasWarmupProp(props...))
	})

	t.Run("no warmup key", func(t *testing.T) {
		props := []*commonpb.KeyValuePair{
			{Key: "other_key", Value: "other_value"},
		}
		assert.False(t, hasWarmupProp(props...))
	})

	t.Run("empty props", func(t *testing.T) {
		assert.False(t, hasWarmupProp())
	})
}

func TestHasPropInDeletekeys(t *testing.T) {
	t.Run("has mmap key", func(t *testing.T) {
		keys := []string{common.MmapEnabledKey}
		assert.Equal(t, common.MmapEnabledKey, hasPropInDeletekeys(keys))
	})

	t.Run("has generic warmup key", func(t *testing.T) {
		keys := []string{common.WarmupKey}
		assert.Equal(t, common.WarmupKey, hasPropInDeletekeys(keys))
	})

	t.Run("has granular warmup keys", func(t *testing.T) {
		assert.Equal(t, common.WarmupScalarFieldKey, hasPropInDeletekeys([]string{common.WarmupScalarFieldKey}))
		assert.Equal(t, common.WarmupScalarIndexKey, hasPropInDeletekeys([]string{common.WarmupScalarIndexKey}))
		assert.Equal(t, common.WarmupVectorFieldKey, hasPropInDeletekeys([]string{common.WarmupVectorFieldKey}))
		assert.Equal(t, common.WarmupVectorIndexKey, hasPropInDeletekeys([]string{common.WarmupVectorIndexKey}))
	})

	t.Run("no special key", func(t *testing.T) {
		keys := []string{"other_key"}
		assert.Equal(t, "", hasPropInDeletekeys(keys))
	})

	t.Run("empty keys", func(t *testing.T) {
		assert.Equal(t, "", hasPropInDeletekeys([]string{}))
	})
}

func TestValidateAddFieldRequest(t *testing.T) {
	// Build a base schema with one int64 PK and one float vector field.
	baseSchema := func() *schemapb.CollectionSchema {
		return &schemapb.CollectionSchema{
			Name: "test_coll",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{
					FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector,
					TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}},
				},
			},
		}
	}

	t.Run("happy path", func(t *testing.T) {
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:     "new_field",
			DataType: schemapb.DataType_Int64,
			Nullable: true,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.NoError(t, err)
	})

	t.Run("text field requires storage v3", func(t *testing.T) {
		paramtable.Get().Save(paramtable.Get().CommonCfg.UseLoonFFI.Key, "false")
		t.Cleanup(func() {
			paramtable.Get().Reset(paramtable.Get().CommonCfg.UseLoonFFI.Key)
		})
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:     "text_field",
			DataType: schemapb.DataType_Text,
			Nullable: true,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.Contains(t, err.Error(), "TEXT field requires StorageV3")
	})

	t.Run("text field allowed with storage v3", func(t *testing.T) {
		paramtable.Get().Save(paramtable.Get().CommonCfg.UseLoonFFI.Key, "true")
		t.Cleanup(func() {
			paramtable.Get().Reset(paramtable.Get().CommonCfg.UseLoonFFI.Key)
		})
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:     "text_field",
			DataType: schemapb.DataType_Text,
			Nullable: true,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.NoError(t, err)
	})

	t.Run("text add field does not support default value", func(t *testing.T) {
		paramtable.Get().Save(paramtable.Get().CommonCfg.UseLoonFFI.Key, "true")
		t.Cleanup(func() {
			paramtable.Get().Reset(paramtable.Get().CommonCfg.UseLoonFFI.Key)
		})
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:     "text_field",
			DataType: schemapb.DataType_Text,
			Nullable: true,
			DefaultValue: &schemapb.ValueField{
				Data: &schemapb.ValueField_StringData{StringData: "default text"},
			},
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.Contains(t, err.Error(), "default value is not supported when adding TEXT field")
	})

	t.Run("field count exceeds MaxFieldNum", func(t *testing.T) {
		schema := baseSchema()
		// Build exactly MaxFieldNum fields so that the check triggers.
		maxFieldNum := Params.ProxyCfg.MaxFieldNum.GetAsInt()
		for i := len(schema.Fields); i < maxFieldNum; i++ {
			schema.Fields = append(schema.Fields, &schemapb.FieldSchema{
				FieldID:  int64(200 + i),
				Name:     fmt.Sprintf("field_%d", i),
				DataType: schemapb.DataType_Int64,
			})
		}
		newField := &schemapb.FieldSchema{
			Name:     "overflow_field",
			DataType: schemapb.DataType_Int64,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("duplicate field name", func(t *testing.T) {
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:     "vec", // already exists
			DataType: schemapb.DataType_Int64,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("invalid DataType_None", func(t *testing.T) {
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:     "invalid_type_field",
			DataType: schemapb.DataType_None,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("external field mapping", func(t *testing.T) {
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:          "external_field",
			DataType:      schemapb.DataType_Int64,
			ExternalField: "remote_field",
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.Contains(t, err.Error(), "does not support external field mapping")
	})

	t.Run("external collection requires external field mapping", func(t *testing.T) {
		schema := baseSchema()
		for _, field := range schema.GetFields() {
			field.ExternalField = field.GetName()
		}
		newField := &schemapb.FieldSchema{
			Name:     "score",
			DataType: schemapb.DataType_Double,
			Nullable: true,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.Contains(t, err.Error(), "requires external_field mapping")
	})

	t.Run("external collection allows external field mapping", func(t *testing.T) {
		schema := baseSchema()
		for _, field := range schema.GetFields() {
			field.ExternalField = field.GetName()
		}
		newField := &schemapb.FieldSchema{
			Name:          "score",
			DataType:      schemapb.DataType_Double,
			Nullable:      true,
			ExternalField: "score",
		}
		err := validateAddFieldRequest(schema, newField)
		assert.NoError(t, err)
	})

	t.Run("external collection rejects unsupported field type", func(t *testing.T) {
		schema := baseSchema()
		for _, field := range schema.GetFields() {
			field.ExternalField = field.GetName()
		}
		newField := &schemapb.FieldSchema{
			Name:          "sparse",
			DataType:      schemapb.DataType_SparseFloatVector,
			ExternalField: "sparse",
		}
		err := validateAddFieldRequest(schema, newField)
		if assert.Error(t, err) {
			assert.ErrorIs(t, err, merr.ErrParameterInvalid)
			assert.Contains(t, err.Error(), "does not support field type")
		}
	})

	t.Run("external collection rejects duplicate external field mapping", func(t *testing.T) {
		schema := baseSchema()
		for _, field := range schema.GetFields() {
			field.ExternalField = field.GetName()
		}
		newField := &schemapb.FieldSchema{
			Name:          "score",
			DataType:      schemapb.DataType_Double,
			Nullable:      true,
			ExternalField: "vec",
		}
		err := validateAddFieldRequest(schema, newField)
		if assert.Error(t, err) {
			assert.ErrorIs(t, err, merr.ErrParameterInvalid)
			assert.Contains(t, err.Error(), "external_field \"vec\" is mapped by multiple fields")
		}
	})

	t.Run("system field name RowID", func(t *testing.T) {
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:     "RowID",
			DataType: schemapb.DataType_Int64,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("is_primary_key = true", func(t *testing.T) {
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:         "new_pk",
			DataType:     schemapb.DataType_Int64,
			IsPrimaryKey: true,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("auto_id = true", func(t *testing.T) {
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:     "auto_field",
			DataType: schemapb.DataType_Int64,
			AutoID:   true,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("is_partition_key = true", func(t *testing.T) {
		schema := baseSchema()
		newField := &schemapb.FieldSchema{
			Name:           "part_key",
			DataType:       schemapb.DataType_Int64,
			IsPartitionKey: true,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("clustering key when schema already has one", func(t *testing.T) {
		schema := baseSchema()
		// Mark an existing field as clustering key.
		schema.Fields[0].IsClusteringKey = true
		newField := &schemapb.FieldSchema{
			Name:            "new_cluster",
			DataType:        schemapb.DataType_Int64,
			IsClusteringKey: true,
		}
		err := validateAddFieldRequest(schema, newField)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("vector type with max vector fields exceeded", func(t *testing.T) {
		schema := baseSchema()
		// Fill up vector fields to MaxVectorFieldNum.
		maxVecFieldNum := Params.ProxyCfg.MaxVectorFieldNum.GetAsInt()
		// schema already has one FloatVector; add more to reach the limit.
		for i := 1; i < maxVecFieldNum; i++ {
			schema.Fields = append(schema.Fields, &schemapb.FieldSchema{
				FieldID:  int64(300 + i),
				Name:     fmt.Sprintf("vec_%d", i),
				DataType: schemapb.DataType_FloatVector,
				TypeParams: []*commonpb.KeyValuePair{
					{Key: "dim", Value: "128"},
				},
			})
		}
		newVecField := &schemapb.FieldSchema{
			Name:     "extra_vec",
			DataType: schemapb.DataType_FloatVector,
			TypeParams: []*commonpb.KeyValuePair{
				{Key: "dim", Value: "128"},
			},
		}
		err := validateAddFieldRequest(schema, newVecField)
		assert.Error(t, err)
	})
}

func TestAlterCollectionSchemaTask(t *testing.T) {
	// Add-function cases require StorageV3 + schema-bump/storage-version compaction enabled
	// (validateAddFunctionRequiresStorageV3). storageVersion.enabled defaults true;
	// bumpSchemaVersion.enabled defaults false, so it must be set explicitly.
	paramtable.Get().Save(paramtable.Get().CommonCfg.UseLoonFFI.Key, "true")
	paramtable.Get().Save(paramtable.Get().DataCoordCfg.BumpSchemaVersionCompactionEnabled.Key, "true")
	defer paramtable.Get().Reset(paramtable.Get().CommonCfg.UseLoonFFI.Key)
	defer paramtable.Get().Reset(paramtable.Get().DataCoordCfg.BumpSchemaVersionCompactionEnabled.Key)
	rc := NewMixCoordMock()
	ctx := context.Background()
	prefix := "TestAlterCollectionSchemaTask"
	dbName := ""
	collectionName := prefix + funcutil.GenRandomStr()
	collectionID := int64(1)

	rc.collName2ID[collectionName] = collectionID
	rc.collID2Meta[collectionID] = collectionMeta{
		name: collectionName,
		id:   collectionID,
		schema: &schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, DataType: schemapb.DataType_Int64, AutoID: true, Name: "ID", IsPrimaryKey: true},
				{
					FieldID: 101, DataType: schemapb.DataType_VarChar, Name: "text",
					TypeParams: []*commonpb.KeyValuePair{
						{Key: "max_length", Value: "65535"},
					},
				},
			},
		},
	}

	// oldSchema matches the collection: has a varchar field "text" used as BM25 input.
	oldSchema := &schemapb.CollectionSchema{
		Fields: []*schemapb.FieldSchema{
			{FieldID: 100, DataType: schemapb.DataType_Int64, AutoID: true, Name: "ID", IsPrimaryKey: true},
			{
				FieldID: 101, DataType: schemapb.DataType_VarChar, Name: "text",
				TypeParams: []*commonpb.KeyValuePair{
					{Key: "max_length", Value: "65535"},
					{Key: "enable_analyzer", Value: "true"},
				},
			},
		},
	}

	// sparseOutputField is the output field for the BM25 function.
	sparseOutputField := &schemapb.FieldSchema{
		Name:     "sparse_bm25",
		DataType: schemapb.DataType_SparseFloatVector,
	}

	// BM25 function schema: input "text", output "sparse_bm25".
	functionSchema := &schemapb.FunctionSchema{
		Name:             "bm25_func",
		Type:             schemapb.FunctionType_BM25,
		InputFieldNames:  []string{"text"},
		OutputFieldNames: []string{"sparse_bm25"},
	}
	functionOnlyOldSchema := proto.Clone(oldSchema).(*schemapb.CollectionSchema)
	functionOnlyOldSchema.Fields = append(functionOnlyOldSchema.Fields, &schemapb.FieldSchema{
		FieldID:  102,
		Name:     "existing_minhash_output",
		DataType: schemapb.DataType_BinaryVector,
		TypeParams: []*commonpb.KeyValuePair{
			{Key: common.DimKey, Value: "4096"},
		},
	})
	minHashFunctionOnlySchema := &schemapb.FunctionSchema{
		Name:             "minhash_existing_func",
		Type:             schemapb.FunctionType_MinHash,
		InputFieldNames:  []string{"text"},
		OutputFieldNames: []string{"existing_minhash_output"},
		Params: []*commonpb.KeyValuePair{
			{Key: "num_hashes", Value: "128"},
			{Key: "shingle_size", Value: "3"},
			{Key: "hash_function", Value: "xxhash64"},
			{Key: "seed", Value: "42"},
		},
	}

	buildValidRequest := func() *milvuspb.AlterCollectionSchemaRequest {
		return &milvuspb.AlterCollectionSchemaRequest{
			DbName:         dbName,
			CollectionName: collectionName,
			Action: &milvuspb.AlterCollectionSchemaRequest_Action{
				Op: &milvuspb.AlterCollectionSchemaRequest_Action_AddRequest{
					AddRequest: &milvuspb.AlterCollectionSchemaRequest_AddRequest{
						FieldInfos: []*milvuspb.AlterCollectionSchemaRequest_FieldInfo{
							{
								FieldSchema: proto.Clone(sparseOutputField).(*schemapb.FieldSchema),
								ExtraParams: []*commonpb.KeyValuePair{
									{Key: common.IndexTypeKey, Value: "SPARSE_INVERTED_INDEX"},
									{Key: common.MetricTypeKey, Value: "BM25"},
								},
							},
						},
						FuncSchema: []*schemapb.FunctionSchema{proto.Clone(functionSchema).(*schemapb.FunctionSchema)},
					},
				},
			},
		}
	}

	buildAddFieldRequest := func(fieldName string, nullable bool, doBackfill bool) *milvuspb.AlterCollectionSchemaRequest {
		return &milvuspb.AlterCollectionSchemaRequest{
			DbName:         dbName,
			CollectionName: collectionName,
			Action: &milvuspb.AlterCollectionSchemaRequest_Action{
				Op: &milvuspb.AlterCollectionSchemaRequest_Action_AddRequest{
					AddRequest: &milvuspb.AlterCollectionSchemaRequest_AddRequest{
						FieldInfos: []*milvuspb.AlterCollectionSchemaRequest_FieldInfo{
							{FieldSchema: &schemapb.FieldSchema{
								Name:     fieldName,
								DataType: schemapb.DataType_VarChar,
								Nullable: nullable,
								TypeParams: []*commonpb.KeyValuePair{
									{Key: common.MaxLengthKey, Value: "128"},
								},
							}},
						},
						DoPhysicalBackfill: doBackfill,
					},
				},
			},
		}
	}

	buildAddFunctionRequest := func(functionSchema *schemapb.FunctionSchema) *milvuspb.AlterCollectionSchemaRequest {
		return &milvuspb.AlterCollectionSchemaRequest{
			DbName:         dbName,
			CollectionName: collectionName,
			Action: &milvuspb.AlterCollectionSchemaRequest_Action{
				Op: &milvuspb.AlterCollectionSchemaRequest_Action_AddRequest{
					AddRequest: &milvuspb.AlterCollectionSchemaRequest_AddRequest{
						FuncSchema: []*schemapb.FunctionSchema{functionSchema},
					},
				},
			},
		}
	}

	buildTask := func(req *milvuspb.AlterCollectionSchemaRequest, schema *schemapb.CollectionSchema) *alterCollectionSchemaTask {
		return &alterCollectionSchemaTask{
			Condition:                     NewTaskCondition(ctx),
			AlterCollectionSchemaRequest:  req,
			AlterCollectionSchemaResponse: nil,
			ctx:                           ctx,
			mixCoord:                      rc,
			oldSchema:                     schema,
		}
	}

	t.Run("OnEnqueue", func(t *testing.T) {
		task := buildTask(buildValidRequest(), oldSchema)
		err := task.OnEnqueue()
		assert.NoError(t, err)
		assert.Equal(t, commonpb.MsgType_AlterCollectionSchema, task.Type())
	})

	t.Run("ctx", func(t *testing.T) {
		task := buildTask(buildValidRequest(), oldSchema)
		assert.NotNil(t, task.TraceCtx())
	})

	t.Run("id", func(t *testing.T) {
		task := buildTask(buildValidRequest(), oldSchema)
		_ = task.OnEnqueue()
		id := UniqueID(uniquegenerator.GetUniqueIntGeneratorIns().GetInt())
		task.SetID(id)
		assert.Equal(t, id, task.ID())
	})

	t.Run("name", func(t *testing.T) {
		task := buildTask(buildValidRequest(), oldSchema)
		assert.Equal(t, AlterCollectionSchemaTaskName, task.Name())
	})

	t.Run("ts", func(t *testing.T) {
		task := buildTask(buildValidRequest(), oldSchema)
		_ = task.OnEnqueue()
		ts := Timestamp(time.Now().UnixNano())
		task.SetTs(ts)
		assert.Equal(t, ts, task.BeginTs())
		assert.Equal(t, ts, task.EndTs())
	})

	t.Run("PostExecute", func(t *testing.T) {
		task := buildTask(buildValidRequest(), oldSchema)
		assert.NoError(t, task.PostExecute(ctx))
	})

	t.Run("PreExecute nil oldSchema", func(t *testing.T) {
		task := buildTask(buildValidRequest(), nil)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("PreExecute nil action", func(t *testing.T) {
		req := &milvuspb.AlterCollectionSchemaRequest{
			DbName:         dbName,
			CollectionName: collectionName,
			Action:         nil,
		}
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("PreExecute nil addRequest", func(t *testing.T) {
		// Action is set but Op is not AddRequest (use nil oneof).
		req := &milvuspb.AlterCollectionSchemaRequest{
			DbName:         dbName,
			CollectionName: collectionName,
			Action:         &milvuspb.AlterCollectionSchemaRequest_Action{
				// Op is nil — GetAddRequest() returns nil.
			},
		}
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("PreExecute add field without funcSchema", func(t *testing.T) {
		task := buildTask(buildAddFieldRequest("extra_text", true, false), oldSchema)
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("PreExecute add field without funcSchema ignores physical backfill flag", func(t *testing.T) {
		task := buildTask(buildAddFieldRequest("extra_text_backfill", true, true), oldSchema)
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("PreExecute add field without funcSchema requires nullable field", func(t *testing.T) {
		task := buildTask(buildAddFieldRequest("extra_text_not_nullable", false, false), oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.ErrorContains(t, err, "added field must be nullable")
	})

	t.Run("PreExecute rejects duplicated add field name", func(t *testing.T) {
		task := buildTask(buildAddFieldRequest("text", true, false), oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.ErrorContains(t, err, "duplicated field name")
	})

	t.Run("PreExecute rejects invalid add field name", func(t *testing.T) {
		task := buildTask(buildAddFieldRequest("invalid field name", true, false), oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorContains(t, err, "Invalid field name")
	})

	t.Run("PreExecute multiple funcSchemas", func(t *testing.T) {
		req := &milvuspb.AlterCollectionSchemaRequest{
			DbName:         dbName,
			CollectionName: collectionName,
			Action: &milvuspb.AlterCollectionSchemaRequest_Action{
				Op: &milvuspb.AlterCollectionSchemaRequest_Action_AddRequest{
					AddRequest: &milvuspb.AlterCollectionSchemaRequest_AddRequest{
						FieldInfos: []*milvuspb.AlterCollectionSchemaRequest_FieldInfo{
							{FieldSchema: sparseOutputField},
						},
						FuncSchema: []*schemapb.FunctionSchema{functionSchema, functionSchema}, // two functions
					},
				},
			},
		}
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("PreExecute nil funcSchema", func(t *testing.T) {
		task := buildTask(buildAddFunctionRequest(nil), oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.ErrorContains(t, err, "function schema is nil")
	})

	t.Run("PreExecute add function without fieldInfos", func(t *testing.T) {
		task := buildTask(buildAddFunctionRequest(minHashFunctionOnlySchema), functionOnlyOldSchema)
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("PreExecute rejects function-only BM25 request", func(t *testing.T) {
		task := buildTask(buildAddFunctionRequest(functionSchema), oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.ErrorContains(t, err, "add_function_field")
	})

	t.Run("PreExecute rejects empty add request", func(t *testing.T) {
		req := &milvuspb.AlterCollectionSchemaRequest{
			DbName:         dbName,
			CollectionName: collectionName,
			Action: &milvuspb.AlterCollectionSchemaRequest_Action{
				Op: &milvuspb.AlterCollectionSchemaRequest_Action_AddRequest{
					AddRequest: &milvuspb.AlterCollectionSchemaRequest_AddRequest{},
				},
			},
		}
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("PreExecute multiple fieldInfos", func(t *testing.T) {
		req := &milvuspb.AlterCollectionSchemaRequest{
			DbName:         dbName,
			CollectionName: collectionName,
			Action: &milvuspb.AlterCollectionSchemaRequest_Action{
				Op: &milvuspb.AlterCollectionSchemaRequest_Action_AddRequest{
					AddRequest: &milvuspb.AlterCollectionSchemaRequest_AddRequest{
						FieldInfos: []*milvuspb.AlterCollectionSchemaRequest_FieldInfo{
							{FieldSchema: sparseOutputField},
							{FieldSchema: &schemapb.FieldSchema{Name: "extra", DataType: schemapb.DataType_Int64}},
						},
						FuncSchema: []*schemapb.FunctionSchema{functionSchema},
					},
				},
			},
		}
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("PreExecute nil fieldSchema in fieldInfo", func(t *testing.T) {
		req := &milvuspb.AlterCollectionSchemaRequest{
			DbName:         dbName,
			CollectionName: collectionName,
			Action: &milvuspb.AlterCollectionSchemaRequest_Action{
				Op: &milvuspb.AlterCollectionSchemaRequest_Action_AddRequest{
					AddRequest: &milvuspb.AlterCollectionSchemaRequest_AddRequest{
						FieldInfos: []*milvuspb.AlterCollectionSchemaRequest_FieldInfo{
							{FieldSchema: nil}, // nil inner schema
						},
						FuncSchema: []*schemapb.FunctionSchema{functionSchema},
					},
				},
			},
		}
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("PreExecute output field points to existing field", func(t *testing.T) {
		// OutputFieldNames must only reference newly-added fields, not pre-existing ones.
		// "text" is already in oldSchema; pointing function output to it must be rejected.
		req := &milvuspb.AlterCollectionSchemaRequest{
			DbName:         dbName,
			CollectionName: collectionName,
			Action: &milvuspb.AlterCollectionSchemaRequest_Action{
				Op: &milvuspb.AlterCollectionSchemaRequest_Action_AddRequest{
					AddRequest: &milvuspb.AlterCollectionSchemaRequest_AddRequest{
						FieldInfos: []*milvuspb.AlterCollectionSchemaRequest_FieldInfo{
							{FieldSchema: sparseOutputField},
						},
						FuncSchema: []*schemapb.FunctionSchema{
							{
								Name:             "bm25_func",
								Type:             schemapb.FunctionType_BM25,
								InputFieldNames:  []string{"text"},
								OutputFieldNames: []string{"text"}, // "text" exists in oldSchema — must be rejected
							},
						},
					},
				},
			},
		}
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
	})

	t.Run("PreExecute supports MinHash function with new output field", func(t *testing.T) {
		req := buildValidRequest()
		addRequest := req.GetAction().GetAddRequest()
		addRequest.FieldInfos[0].FieldSchema = &schemapb.FieldSchema{
			Name:     "binary_minhash",
			DataType: schemapb.DataType_BinaryVector,
			TypeParams: []*commonpb.KeyValuePair{
				{Key: common.DimKey, Value: "4096"},
			},
		}
		addRequest.FieldInfos[0].ExtraParams = []*commonpb.KeyValuePair{
			{Key: common.IndexTypeKey, Value: "MINHASH_LSH"},
			{Key: common.MetricTypeKey, Value: "MHJACCARD"},
		}
		functionSchema := proto.Clone(addRequest.GetFuncSchema()[0]).(*schemapb.FunctionSchema)
		functionSchema.Name = "minhash_func"
		functionSchema.Type = schemapb.FunctionType_MinHash
		functionSchema.OutputFieldNames = []string{"binary_minhash"}
		functionSchema.Params = []*commonpb.KeyValuePair{
			{Key: "num_hashes", Value: "128"},
			{Key: "shingle_size", Value: "3"},
			{Key: "hash_function", Value: "xxhash64"},
			{Key: "seed", Value: "42"},
		}
		addRequest.FuncSchema = []*schemapb.FunctionSchema{functionSchema}

		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("PreExecute rejects unsupported function", func(t *testing.T) {
		req := buildValidRequest()
		addRequest := req.GetAction().GetAddRequest()
		functionSchema := proto.Clone(addRequest.GetFuncSchema()[0]).(*schemapb.FunctionSchema)
		functionSchema.Type = schemapb.FunctionType_TextEmbedding
		addRequest.FuncSchema = []*schemapb.FunctionSchema{functionSchema}

		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.ErrorContains(t, err, "only BM25 and MinHash functions are supported")
	})

	t.Run("PreExecute ignores legacy DoPhysicalBackfill", func(t *testing.T) {
		schema := proto.Clone(oldSchema).(*schemapb.CollectionSchema)
		schema.DoPhysicalBackfill = true
		task := buildTask(buildValidRequest(), schema)
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("PreExecute rejects multiple function outputs", func(t *testing.T) {
		req := buildValidRequest()
		req.GetAction().GetAddRequest().GetFuncSchema()[0].OutputFieldNames = []string{"sparse_bm25", "sparse_bm25_extra"}
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.ErrorContains(t, err, "exactly one output field")
	})

	t.Run("PreExecute rejects function-only request with missing output field", func(t *testing.T) {
		req := buildAddFunctionRequest(&schemapb.FunctionSchema{
			Name:             "missing_output_func",
			Type:             schemapb.FunctionType_MinHash,
			InputFieldNames:  []string{"text"},
			OutputFieldNames: []string{"missing_output"},
			Params: []*commonpb.KeyValuePair{
				{Key: "num_hashes", Value: "128"},
				{Key: "shingle_size", Value: "3"},
				{Key: "hash_function", Value: "xxhash64"},
				{Key: "seed", Value: "42"},
			},
		})
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorContains(t, err, "function output field not found")
	})

	t.Run("PreExecute happy path", func(t *testing.T) {
		task := buildTask(buildValidRequest(), oldSchema)
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("PreExecute rejects invalid bound index name", func(t *testing.T) {
		req := buildValidRequest()
		req.GetAction().GetAddRequest().GetFieldInfos()[0].IndexName = "1bad-index-name"
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.ErrorIs(t, err, merr.ErrParameterInvalid)
		assert.ErrorContains(t, err, "Invalid index name")
	})

	t.Run("PreExecute keeps the user's original index params in the request", func(t *testing.T) {
		req := buildValidRequest()
		original := proto.Clone(req.GetAction().GetAddRequest().GetFieldInfos()[0]).(*milvuspb.AlterCollectionSchemaRequest_FieldInfo)
		task := buildTask(req, oldSchema)
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
		// Validation-only: no normalization write-back, so the persisted
		// UserIndexParams stay aligned with the create_index convention and a
		// later create_index with identical params remains idempotent.
		assert.True(t, proto.Equal(original, req.GetAction().GetAddRequest().GetFieldInfos()[0]))
	})

	t.Run("Execute leaves function output marker to RootCoord", func(t *testing.T) {
		req := buildValidRequest()
		task := buildTask(req, oldSchema)

		// Ensure PreExecute passes first.
		err := task.PreExecute(ctx)
		assert.NoError(t, err)

		err = task.Execute(ctx)
		assert.NoError(t, err)

		addReq := req.GetAction().GetAddRequest()
		assert.NotNil(t, addReq)
		for _, fi := range addReq.GetFieldInfos() {
			assert.False(t, fi.GetFieldSchema().GetIsFunctionOutput())
		}
	})

	t.Run("Execute keeps plain added field as non-function output", func(t *testing.T) {
		req := buildAddFieldRequest("execute_plain_text", true, true)
		task := buildTask(req, oldSchema)

		err := task.PreExecute(ctx)
		assert.NoError(t, err)

		err = task.Execute(ctx)
		assert.NoError(t, err)

		addReq := req.GetAction().GetAddRequest()
		assert.NotNil(t, addReq)
		for _, fi := range addReq.GetFieldInfos() {
			assert.False(t, fi.GetFieldSchema().GetIsFunctionOutput())
		}
	})

	t.Run("Execute supports function-only add request", func(t *testing.T) {
		req := buildAddFunctionRequest(minHashFunctionOnlySchema)
		task := buildTask(req, functionOnlyOldSchema)

		err := task.PreExecute(ctx)
		assert.NoError(t, err)

		err = task.Execute(ctx)
		assert.NoError(t, err)
		assert.Empty(t, req.GetAction().GetAddRequest().GetFieldInfos())
	})

	t.Run("Execute skips nil field infos", func(t *testing.T) {
		req := buildValidRequest()
		req.GetAction().GetAddRequest().FieldInfos = []*milvuspb.AlterCollectionSchemaRequest_FieldInfo{
			nil,
			{FieldSchema: nil},
		}
		task := buildTask(req, oldSchema)

		err := task.Execute(ctx)
		assert.NoError(t, err)
	})

	t.Run("Execute returns error when mixCoord AlterCollectionSchema fails", func(t *testing.T) {
		mockey.PatchConvey("mixCoord returns error status", t, func() {
			mockey.Mock((*MixCoordMock).AlterCollectionSchema).Return(
				&milvuspb.AlterCollectionSchemaResponse{
					AlterStatus: merr.Status(merr.ErrServiceUnavailable),
				}, nil,
			).Build()

			req := buildValidRequest()
			task := buildTask(req, oldSchema)
			err := task.PreExecute(ctx)
			assert.NoError(t, err)

			err = task.Execute(ctx)
			assert.Error(t, err)
		})
	})
}

// TestAlterCollection_RejectExternalTupleMutation verifies the proxy-layer
// guard rejects user alter_collection_properties calls that target the
// external_source / external_spec tuple. Mutation of this tuple is reserved
// to RefreshExternalCollection; see issue #49335.
func TestAlterCollection_RejectExternalTupleMutation(t *testing.T) {
	ctx := context.Background()
	task := &alterCollectionTask{
		AlterCollectionRequest: &milvuspb.AlterCollectionRequest{
			Base:           &commonpb.MsgBase{MsgType: commonpb.MsgType_AlterCollection},
			DbName:         dbName,
			CollectionName: "ext_guard_test",
		},
	}

	t.Run("reject properties with external_source", func(t *testing.T) {
		task.Properties = []*commonpb.KeyValuePair{
			{Key: common.CollectionExternalSource, Value: "s3://bucket/a/"},
		}
		task.DeleteKeys = nil
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "RefreshExternalCollection")
	})

	t.Run("reject properties with external_spec", func(t *testing.T) {
		task.Properties = []*commonpb.KeyValuePair{
			{Key: common.CollectionExternalSpec, Value: `{"format":"parquet"}`},
		}
		task.DeleteKeys = nil
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "RefreshExternalCollection")
	})

	t.Run("reject delete of external_source", func(t *testing.T) {
		task.Properties = nil
		task.DeleteKeys = []string{common.CollectionExternalSource}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "immutable")
	})

	t.Run("reject delete of external_spec", func(t *testing.T) {
		task.Properties = nil
		task.DeleteKeys = []string{common.CollectionExternalSpec}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "immutable")
	})
}

func testDropFieldBaseSchema() *schemapb.CollectionSchema {
	return &schemapb.CollectionSchema{
		Name: "test_collection",
		Fields: []*schemapb.FieldSchema{
			{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
			{FieldID: 101, Name: "vector", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
			{FieldID: 102, Name: "scalar_field", DataType: schemapb.DataType_VarChar},
			{FieldID: 103, Name: "partition_key", DataType: schemapb.DataType_Int64, IsPartitionKey: true},
			{FieldID: 104, Name: "clustering_key", DataType: schemapb.DataType_Int64, IsClusteringKey: true},
			{FieldID: 105, Name: "dynamic_field", DataType: schemapb.DataType_JSON, IsDynamic: true},
		},
		Functions: []*schemapb.FunctionSchema{
			{Name: "test_func", InputFieldNames: []string{"scalar_field"}, OutputFieldNames: []string{"vector"}},
		},
	}
}

func TestValidateDropField(t *testing.T) {
	baseSchema := testDropFieldBaseSchema()

	t.Run("empty field name", func(t *testing.T) {
		err := validateDropField(baseSchema, "")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "field name is empty")
	})

	t.Run("field not found", func(t *testing.T) {
		err := validateDropField(baseSchema, "nonexistent_field")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "field not found")
	})

	t.Run("cannot drop primary key", func(t *testing.T) {
		err := validateDropField(baseSchema, "id")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "cannot drop primary key field")
	})

	t.Run("cannot drop the last vector field", func(t *testing.T) {
		err := validateDropField(baseSchema, "vector")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "cannot drop the last vector field")
	})

	t.Run("can drop vector field when multiple exist", func(t *testing.T) {
		multiVecSchema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vector1", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
				{FieldID: 102, Name: "vector2", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "64"}}},
			},
		}
		err := validateDropField(multiVecSchema, "vector2")
		assert.NoError(t, err)
	})

	t.Run("cannot drop partition key", func(t *testing.T) {
		err := validateDropField(baseSchema, "partition_key")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "cannot drop partition key field")
	})

	t.Run("cannot drop clustering key", func(t *testing.T) {
		err := validateDropField(baseSchema, "clustering_key")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "cannot drop clustering key field")
	})

	t.Run("cannot drop dynamic field", func(t *testing.T) {
		err := validateDropField(baseSchema, "dynamic_field")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "cannot drop dynamic field")
	})

	t.Run("cannot drop active ttl field", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vector", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
				{FieldID: 102, Name: "ttl", DataType: schemapb.DataType_Timestamptz, Nullable: true},
			},
			Properties: []*commonpb.KeyValuePair{
				{Key: common.CollectionTTLFieldKey, Value: "ttl"},
			},
		}

		err := validateDropField(schema, "ttl")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "referenced by collection property ttl_field")
	})

	t.Run("field referenced by function - input", func(t *testing.T) {
		err := validateDropField(baseSchema, "scalar_field")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "is referenced by function test_func as input")
	})

	t.Run("field referenced by function - output", func(t *testing.T) {
		// Need two vector fields so the "last vector field" check passes,
		// allowing us to reach the output field reference check.
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vec_output", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
				{FieldID: 102, Name: "vec_other", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "64"}}},
				{FieldID: 103, Name: "text", DataType: schemapb.DataType_VarChar},
			},
			Functions: []*schemapb.FunctionSchema{
				{Name: "embed_func", InputFieldNames: []string{"text"}, OutputFieldNames: []string{"vec_output"}},
			},
		}
		err := validateDropField(schema, "vec_output")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "is referenced by function embed_func as output")
	})

	t.Run("success - field can be dropped", func(t *testing.T) {
		schemaNoFunc := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vector", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
				{FieldID: 102, Name: "droppable_field", DataType: schemapb.DataType_VarChar},
			},
		}
		err := validateDropField(schemaNoFunc, "droppable_field")
		assert.NoError(t, err)
	})

	t.Run("can drop vector when struct array field also has vector", func(t *testing.T) {
		// Top-level vector is the only Fields-level vector, but the struct
		// array field also contains a vector, so total vector count == 2 and
		// the drop should succeed.
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
			},
			StructArrayFields: []*schemapb.StructArrayFieldSchema{
				{
					FieldID: 102, Name: "paragraphs",
					Fields: []*schemapb.FieldSchema{
						{FieldID: 103, Name: "para_embed", DataType: schemapb.DataType_ArrayOfVector},
					},
				},
			},
		}
		err := validateDropField(schema, "vec")
		assert.NoError(t, err)
	})

	t.Run("drop whole struct array field by name - success", func(t *testing.T) {
		// Top-level vector remains after dropping the struct, so the drop is allowed.
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
			},
			StructArrayFields: []*schemapb.StructArrayFieldSchema{
				{
					FieldID: 102, Name: "paragraphs",
					Fields: []*schemapb.FieldSchema{
						{FieldID: 103, Name: "para_text", DataType: schemapb.DataType_Array},
					},
				},
			},
		}
		err := validateDropField(schema, "paragraphs")
		assert.NoError(t, err)
	})

	t.Run("reject drop struct array field when it holds the only vector", func(t *testing.T) {
		// The struct contains the only vector in the collection (an ArrayOfVector
		// sub-field); dropping it would leave no vector field.
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
			},
			StructArrayFields: []*schemapb.StructArrayFieldSchema{
				{
					FieldID: 101, Name: "paragraphs",
					Fields: []*schemapb.FieldSchema{
						{FieldID: 102, Name: "para_text", DataType: schemapb.DataType_Array},
						{FieldID: 103, Name: "para_embed", DataType: schemapb.DataType_ArrayOfVector},
					},
				},
			},
		}
		err := validateDropField(schema, "paragraphs")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "would leave no vector field")
	})

	t.Run("reject drop struct array field with protected sub-field", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
			},
			StructArrayFields: []*schemapb.StructArrayFieldSchema{
				{
					FieldID: 102, Name: "paragraphs",
					Fields: []*schemapb.FieldSchema{
						{FieldID: 103, Name: "para_key", DataType: schemapb.DataType_Array, IsPartitionKey: true},
					},
				},
			},
		}
		err := validateDropField(schema, "paragraphs")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "sub-field para_key is partition key")
	})

	t.Run("reject drop struct array field referenced by function", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
			},
			StructArrayFields: []*schemapb.StructArrayFieldSchema{
				{
					FieldID: 102, Name: "paragraphs",
					Fields: []*schemapb.FieldSchema{
						{FieldID: 103, Name: "para_text", DataType: schemapb.DataType_Array},
					},
				},
			},
			Functions: []*schemapb.FunctionSchema{
				{Name: "embed_func", InputFieldNames: []string{"para_text"}, OutputFieldNames: []string{"vec"}},
			},
		}
		err := validateDropField(schema, "paragraphs")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "sub-field para_text is referenced by function embed_func as input")
	})

	t.Run("reject drop sub-field of struct array field by name", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
			},
			StructArrayFields: []*schemapb.StructArrayFieldSchema{
				{
					FieldID: 102, Name: "paragraphs",
					Fields: []*schemapb.FieldSchema{
						{FieldID: 103, Name: "para_text", DataType: schemapb.DataType_Array},
					},
				},
			},
		}
		err := validateDropField(schema, "para_text")
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "cannot drop sub-field of struct array field")
		assert.Contains(t, err.Error(), "paragraphs.para_text")
	})
}

func TestAlterCollectionSchemaTask_PreExecute(t *testing.T) {
	ctx := context.Background()
	baseSchema := testDropFieldBaseSchema()

	t.Run("nil action", func(t *testing.T) {
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: baseSchema,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action:         nil,
			},
		}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "action is nil")
	})

	t.Run("empty add request fails validation", func(t *testing.T) {
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: baseSchema,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_AddRequest{},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "add_request is nil")
	})

	t.Run("drop by field_name - validation error", func(t *testing.T) {
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: baseSchema,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_DropRequest{
						DropRequest: &milvuspb.AlterCollectionSchemaRequest_DropRequest{
							Identifier: &milvuspb.AlterCollectionSchemaRequest_DropRequest_FieldName{
								FieldName: "id",
							},
						},
					},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "cannot drop primary key field")
	})

	t.Run("drop by field_id - success", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vector", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
				{FieldID: 102, Name: "droppable", DataType: schemapb.DataType_VarChar},
			},
		}
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: schema,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_DropRequest{
						DropRequest: &milvuspb.AlterCollectionSchemaRequest_DropRequest{
							Identifier: &milvuspb.AlterCollectionSchemaRequest_DropRequest_FieldId{
								FieldId: 102,
							},
						},
					},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("drop by field_id - not found", func(t *testing.T) {
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: baseSchema,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_DropRequest{
						DropRequest: &milvuspb.AlterCollectionSchemaRequest_DropRequest{
							Identifier: &milvuspb.AlterCollectionSchemaRequest_DropRequest_FieldId{
								FieldId: 999,
							},
						},
					},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "field not found with id")
	})

	t.Run("drop by field_name - success", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vector", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
				{FieldID: 102, Name: "droppable", DataType: schemapb.DataType_VarChar},
			},
		}
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: schema,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_DropRequest{
						DropRequest: &milvuspb.AlterCollectionSchemaRequest_DropRequest{
							Identifier: &milvuspb.AlterCollectionSchemaRequest_DropRequest_FieldName{
								FieldName: "droppable",
							},
						},
					},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("drop by function_name - detach minhash success", func(t *testing.T) {
		schemaWithFunc := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vector", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
				{FieldID: 102, Name: "text", DataType: schemapb.DataType_VarChar},
			},
			Functions: []*schemapb.FunctionSchema{
				{Name: "minhash_func", Type: schemapb.FunctionType_MinHash},
			},
		}
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: schemaWithFunc,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_DropRequest{
						DropRequest: &milvuspb.AlterCollectionSchemaRequest_DropRequest{
							Identifier: &milvuspb.AlterCollectionSchemaRequest_DropRequest_FunctionName{
								FunctionName: "minhash_func",
							},
						},
					},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("drop by function_name - bm25 function field success", func(t *testing.T) {
		schemaWithFunc := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "dense_vector", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
				{FieldID: 102, Name: "text", DataType: schemapb.DataType_VarChar},
				{FieldID: 103, Name: "sparse_vector", DataType: schemapb.DataType_SparseFloatVector},
			},
			Functions: []*schemapb.FunctionSchema{
				{
					Name:             "bm25_func",
					Type:             schemapb.FunctionType_BM25,
					InputFieldNames:  []string{"text"},
					OutputFieldNames: []string{"sparse_vector"},
				},
			},
		}
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: schemaWithFunc,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_DropRequest{
						DropRequest: &milvuspb.AlterCollectionSchemaRequest_DropRequest{
							Identifier: &milvuspb.AlterCollectionSchemaRequest_DropRequest_FunctionName{
								FunctionName: "bm25_func",
							},
							DropFunctionOutputFields: true,
						},
					},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("drop by function_name - not found", func(t *testing.T) {
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: baseSchema,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_DropRequest{
						DropRequest: &milvuspb.AlterCollectionSchemaRequest_DropRequest{
							Identifier: &milvuspb.AlterCollectionSchemaRequest_DropRequest_FunctionName{
								FunctionName: "nonexistent_func",
							},
						},
					},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "function not found")
	})

	t.Run("drop with empty schema", func(t *testing.T) {
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: nil,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_DropRequest{
						DropRequest: &milvuspb.AlterCollectionSchemaRequest_DropRequest{
							Identifier: &milvuspb.AlterCollectionSchemaRequest_DropRequest_FieldName{
								FieldName: "field",
							},
						},
					},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "empty old schema")
	})

	t.Run("drop by field_id - struct array field success", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
			},
			StructArrayFields: []*schemapb.StructArrayFieldSchema{
				{
					FieldID: 102, Name: "paragraphs",
					Fields: []*schemapb.FieldSchema{
						{FieldID: 103, Name: "para_text", DataType: schemapb.DataType_Array},
					},
				},
			},
		}
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: schema,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_DropRequest{
						DropRequest: &milvuspb.AlterCollectionSchemaRequest_DropRequest{
							Identifier: &milvuspb.AlterCollectionSchemaRequest_DropRequest_FieldId{
								FieldId: 102,
							},
						},
					},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.NoError(t, err)
	})

	t.Run("drop by field_id - reject sub-field of struct array field", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Name: "test_collection",
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "vec", DataType: schemapb.DataType_FloatVector, TypeParams: []*commonpb.KeyValuePair{{Key: "dim", Value: "128"}}},
			},
			StructArrayFields: []*schemapb.StructArrayFieldSchema{
				{
					FieldID: 102, Name: "paragraphs",
					Fields: []*schemapb.FieldSchema{
						{FieldID: 103, Name: "para_text", DataType: schemapb.DataType_Array},
					},
				},
			},
		}
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: schema,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action: &milvuspb.AlterCollectionSchemaRequest_Action{
					Op: &milvuspb.AlterCollectionSchemaRequest_Action_DropRequest{
						DropRequest: &milvuspb.AlterCollectionSchemaRequest_DropRequest{
							Identifier: &milvuspb.AlterCollectionSchemaRequest_DropRequest_FieldId{
								FieldId: 103,
							},
						},
					},
				},
			},
		}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "cannot drop sub-field of struct array field")
		assert.Contains(t, err.Error(), "paragraphs.para_text")
	})

	t.Run("unknown action type", func(t *testing.T) {
		task := &alterCollectionSchemaTask{
			ctx:       ctx,
			oldSchema: baseSchema,
			AlterCollectionSchemaRequest: &milvuspb.AlterCollectionSchemaRequest{
				CollectionName: "test_collection",
				Action:         &milvuspb.AlterCollectionSchemaRequest_Action{},
			},
		}
		err := task.PreExecute(ctx)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "unknown action type")
	})
}

func TestValidateDropFunction(t *testing.T) {
	t.Run("empty function name", func(t *testing.T) {
		err := validateDropFunction(&schemapb.CollectionSchema{}, "", false)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "function name is empty")
	})

	t.Run("function not found", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Functions: []*schemapb.FunctionSchema{
				{Name: "embedding_func", Type: schemapb.FunctionType_TextEmbedding},
			},
		}
		err := validateDropFunction(schema, "nonexistent", false)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "function not found")
	})

	t.Run("detach minhash function succeeds", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "text", DataType: schemapb.DataType_VarChar},
				{FieldID: 102, Name: "minhash_vec", DataType: schemapb.DataType_BinaryVector},
			},
			Functions: []*schemapb.FunctionSchema{
				{
					Name: "minhash_func", Type: schemapb.FunctionType_MinHash,
					InputFieldNames: []string{"text"}, OutputFieldNames: []string{"minhash_vec"},
				},
			},
		}
		err := validateDropFunction(schema, "minhash_func", false)
		assert.NoError(t, err)
	})

	t.Run("detach bm25 function fails", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "text", DataType: schemapb.DataType_VarChar},
				{FieldID: 102, Name: "sparse_vec", DataType: schemapb.DataType_SparseFloatVector},
			},
			Functions: []*schemapb.FunctionSchema{
				{
					Name: "bm25_func", Type: schemapb.FunctionType_BM25,
					InputFieldNames: []string{"text"}, OutputFieldNames: []string{"sparse_vec"},
				},
			},
		}
		err := validateDropFunction(schema, "bm25_func", false)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "BM25 function must be dropped with its output field")
	})

	t.Run("drop function field leaves another vector field", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "text", DataType: schemapb.DataType_VarChar},
				{FieldID: 102, Name: "sparse_vec", DataType: schemapb.DataType_SparseFloatVector},
				{FieldID: 103, Name: "vec_other", DataType: schemapb.DataType_FloatVector},
			},
			Functions: []*schemapb.FunctionSchema{
				{
					Name: "bm25_func", Type: schemapb.FunctionType_BM25,
					InputFieldNames: []string{"text"}, OutputFieldNames: []string{"sparse_vec"},
				},
			},
		}
		err := validateDropFunction(schema, "bm25_func", true)
		assert.NoError(t, err)
	})

	t.Run("drop minhash function field succeeds", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "text", DataType: schemapb.DataType_VarChar},
				{FieldID: 102, Name: "minhash_vec", DataType: schemapb.DataType_BinaryVector},
				{FieldID: 103, Name: "vec_other", DataType: schemapb.DataType_FloatVector},
			},
			Functions: []*schemapb.FunctionSchema{
				{
					Name: "minhash_func", Type: schemapb.FunctionType_MinHash,
					InputFieldNames: []string{"text"}, OutputFieldNames: []string{"minhash_vec"},
				},
			},
		}
		err := validateDropFunction(schema, "minhash_func", true)
		assert.NoError(t, err)
	})

	t.Run("drop unsupported function field fails", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "text", DataType: schemapb.DataType_VarChar},
				{FieldID: 102, Name: "vec_func_out", DataType: schemapb.DataType_FloatVector},
				{FieldID: 103, Name: "vec_other", DataType: schemapb.DataType_FloatVector},
			},
			Functions: []*schemapb.FunctionSchema{
				{
					Name: "embed_func", Type: schemapb.FunctionType_TextEmbedding,
					InputFieldNames: []string{"text"}, OutputFieldNames: []string{"vec_func_out"},
				},
			},
		}
		err := validateDropFunction(schema, "embed_func", true)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "only BM25 and MinHash functions support dropping output fields")
	})

	t.Run("drop function field would leave no vector field", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "text", DataType: schemapb.DataType_VarChar},
				{FieldID: 102, Name: "sparse_vec", DataType: schemapb.DataType_SparseFloatVector},
			},
			Functions: []*schemapb.FunctionSchema{
				{
					Name: "bm25_func", Type: schemapb.FunctionType_BM25,
					InputFieldNames: []string{"text"}, OutputFieldNames: []string{"sparse_vec"},
				},
			},
		}
		err := validateDropFunction(schema, "bm25_func", true)
		assert.Error(t, err)
		assert.Contains(t, err.Error(), "would leave no vector field")
	})

	t.Run("drop function field preserves vector in struct array field", func(t *testing.T) {
		schema := &schemapb.CollectionSchema{
			Fields: []*schemapb.FieldSchema{
				{FieldID: 100, Name: "id", DataType: schemapb.DataType_Int64, IsPrimaryKey: true},
				{FieldID: 101, Name: "text", DataType: schemapb.DataType_VarChar},
				{FieldID: 102, Name: "sparse_vec", DataType: schemapb.DataType_SparseFloatVector},
			},
			StructArrayFields: []*schemapb.StructArrayFieldSchema{
				{
					FieldID: 103, Name: "paragraphs",
					Fields: []*schemapb.FieldSchema{
						{FieldID: 104, Name: "para_embed", DataType: schemapb.DataType_ArrayOfVector},
					},
				},
			},
			Functions: []*schemapb.FunctionSchema{
				{
					Name: "bm25_func", Type: schemapb.FunctionType_BM25,
					InputFieldNames: []string{"text"}, OutputFieldNames: []string{"sparse_vec"},
				},
			},
		}
		err := validateDropFunction(schema, "bm25_func", true)
		assert.NoError(t, err)
	})
}