chore: import upstream snapshot with attribution
This commit is contained in:
wehub-resource-sync
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// Copyright 2024 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package functions
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import (
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"github.com/cockroachdb/errors"
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/go-mysql-server/sql/expression"
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"github.com/dolthub/doltgresql/core"
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"github.com/dolthub/doltgresql/core/id"
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pgexprs "github.com/dolthub/doltgresql/server/expression"
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"github.com/dolthub/doltgresql/server/functions/framework"
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pgtypes "github.com/dolthub/doltgresql/server/types"
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"github.com/dolthub/doltgresql/utils"
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)
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// initRecord registers the functions to the catalog.
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func initRecord() {
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framework.RegisterFunction(record_in)
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framework.RegisterFunction(record_out)
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framework.RegisterFunction(record_recv)
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framework.RegisterFunction(record_send)
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framework.RegisterFunction(btrecordcmp)
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framework.RegisterFunction(btrecordimagecmp)
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}
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// record_in represents the PostgreSQL function of record type IO input.
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var record_in = framework.Function3{
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Name: "record_in",
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Return: pgtypes.Record,
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Parameters: [3]*pgtypes.DoltgresType{pgtypes.Cstring, pgtypes.Oid, pgtypes.Int32},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [4]*pgtypes.DoltgresType, val1, val2, val3 any) (any, error) {
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return nil, errors.Errorf("record_in not implemented")
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},
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}
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// record_out represents the PostgreSQL function of record type IO output.
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var record_out = framework.Function1{
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Name: "record_out",
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Return: pgtypes.Cstring,
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Parameters: [1]*pgtypes.DoltgresType{pgtypes.Record},
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Strict: true,
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Callable: func(ctx *sql.Context, t [2]*pgtypes.DoltgresType, val any) (any, error) {
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values, ok := val.([]pgtypes.RecordValue)
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if !ok {
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return nil, errors.Errorf("expected []RecordValue, but got %T", val)
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}
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return pgtypes.RecordToString(ctx, values)
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},
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}
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// record_recv represents the PostgreSQL function of record type IO receive. The input of this function is expected to
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// be the output of record_send.
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var record_recv = framework.Function3{
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Name: "record_recv",
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Return: pgtypes.Record,
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Parameters: [3]*pgtypes.DoltgresType{pgtypes.Internal, pgtypes.Oid, pgtypes.Int32},
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Strict: true,
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Callable: record_recv_callable,
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}
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// record_recv_callable is the function definition of record_recv.
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func record_recv_callable(ctx *sql.Context, _ [4]*pgtypes.DoltgresType, val1, val2, val3 any) (any, error) {
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data := val1.([]byte)
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if data == nil {
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return nil, nil
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}
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typeColl, err := core.GetTypesCollectionFromContext(ctx, "")
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if err != nil {
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return nil, err
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}
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reader := utils.NewWireReader(data)
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count := reader.ReadInt32()
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recordVals := make([]pgtypes.RecordValue, count)
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for i := range recordVals {
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typeID := id.Type(id.Cache().ToInternal(reader.ReadUint32()))
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recordType, err := typeColl.GetType(ctx, typeID)
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if err != nil {
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return nil, err
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}
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if recordType == nil {
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return nil, pgtypes.ErrTypeDoesNotExist.New(typeID.TypeName())
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}
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valLen := reader.ReadInt32()
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var recordVal any
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if valLen != -1 {
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valBytes := reader.ReadBytes(uint32(valLen))
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recordVal, err = recordType.CallReceive(ctx, valBytes)
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if err != nil {
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return nil, err
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}
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}
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recordVals[i] = pgtypes.RecordValue{
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Value: recordVal,
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Type: recordType,
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}
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}
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return recordVals, nil
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}
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// record_send represents the PostgreSQL function of record type IO send. The output of this function is expected to
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// be the input of record_recv.
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var record_send = framework.Function1{
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Name: "record_send",
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Return: pgtypes.Bytea,
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Parameters: [1]*pgtypes.DoltgresType{pgtypes.Record},
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Strict: true,
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Callable: func(ctx *sql.Context, t [2]*pgtypes.DoltgresType, val any) (any, error) {
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if wrapper, ok := val.(sql.AnyWrapper); ok {
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var err error
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val, err = wrapper.UnwrapAny(ctx)
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if err != nil {
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return nil, err
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}
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if val == nil {
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return nil, nil
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}
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}
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recordVals := val.([]pgtypes.RecordValue)
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writer := utils.NewWireWriter()
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writer.WriteInt32(int32(len(recordVals)))
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for _, recordVal := range recordVals {
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switch recordType := recordVal.Type.(type) {
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case *pgtypes.DoltgresType:
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writer.WriteUint32(id.Cache().ToOID(recordType.ID.AsId()))
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if recordVal.Value != nil {
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valBytes, err := recordType.CallSend(ctx, recordVal.Value)
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if err != nil {
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return nil, err
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}
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writer.WriteInt32(int32(len(valBytes)))
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writer.WriteBytes(valBytes)
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} else {
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writer.WriteInt32(-1)
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}
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default:
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cast := pgexprs.NewGMSCast(expression.NewLiteral(recordVal.Value, recordType))
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writer.WriteUint32(id.Cache().ToOID(cast.DoltgresType(ctx).ID.AsId()))
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if recordVal.Value != nil {
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castVal, err := cast.Eval(ctx, nil)
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if err != nil {
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return nil, err
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}
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valBytes, err := cast.DoltgresType(ctx).CallSend(ctx, castVal)
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if err != nil {
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return nil, err
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}
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writer.WriteInt32(int32(len(valBytes)))
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writer.WriteBytes(valBytes)
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} else {
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writer.WriteInt32(-1)
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}
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}
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}
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return writer.BufferData(), nil
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},
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}
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// btrecordcmp represents the PostgreSQL function of record type compare.
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var btrecordcmp = framework.Function2{
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Name: "btrecordcmp",
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Return: pgtypes.Int32,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Record, pgtypes.Record},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1, val2 any) (any, error) {
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// TODO
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ab := val1.(string)
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bb := val2.(string)
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if ab == bb {
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return int32(0), nil
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} else if ab < bb {
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return int32(-1), nil
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} else {
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return int32(1), nil
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}
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},
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}
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// btrecordimagecmp represents the PostgreSQL function of record type compare.
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var btrecordimagecmp = framework.Function2{
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Name: "btrecordimagecmp",
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Return: pgtypes.Int32,
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Parameters: [2]*pgtypes.DoltgresType{pgtypes.Record, pgtypes.Record},
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Strict: true,
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Callable: func(ctx *sql.Context, _ [3]*pgtypes.DoltgresType, val1, val2 any) (any, error) {
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// TODO
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return int32(1), nil
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},
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}
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