chore: import upstream snapshot with attribution

2026-07-13 12:32:25 +08:00
commit e014feafe1
2285 changed files with 1131979 additions and 0 deletions
@@ -0,0 +1,136 @@
+// Copyright 2025 Dolthub, Inc.
+//
+// Licensed 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 functions
+
+import (
+	"github.com/dolthub/go-mysql-server/sql"
+
+	"github.com/dolthub/doltgresql/server/functions/framework"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// initArrayPosition registers the functions to the catalog.
+func initArrayPosition() {
+	framework.RegisterFunction(array_position_anyarray_anyelement)
+	framework.RegisterFunction(array_position_anyarray_anyelement_int32)
+	framework.RegisterFunction(array_positions_anyarray_anyelement)
+}
+
+// array_position_anyarray_anyelement represents the PostgreSQL function of the same name, taking the same parameters.
+var array_position_anyarray_anyelement = framework.Function2{
+	Name:       "array_position",
+	Return:     pgtypes.Int32,
+	Parameters: [2]*pgtypes.DoltgresType{pgtypes.AnyArray, pgtypes.AnyElement},
+	Strict:     false,
+	Callable: func(ctx *sql.Context, t [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
+		if val1 == nil {
+			return nil, nil
+		}
+
+		array := val1.([]any)
+		searchElement := val2
+		arrayType := t[0]
+		baseType := arrayType.ArrayBaseType()
+
+		// Search for the element starting from position 1 (1-indexed)
+		for i, element := range array {
+			cmp, err := baseType.Compare(ctx, element, searchElement)
+			if err != nil {
+				return nil, err
+			}
+			if cmp == 0 {
+				return int32(i + 1), nil // PostgreSQL uses 1-indexed arrays
+			}
+		}
+
+		// Element not found
+		return nil, nil
+	},
+}
+
+// array_position_anyarray_anyelement_int32 represents the PostgreSQL function of the same name, taking the same parameters.
+var array_position_anyarray_anyelement_int32 = framework.Function3{
+	Name:       "array_position",
+	Return:     pgtypes.Int32,
+	Parameters: [3]*pgtypes.DoltgresType{pgtypes.AnyArray, pgtypes.AnyElement, pgtypes.Int32},
+	Strict:     false,
+	Callable: func(ctx *sql.Context, t [4]*pgtypes.DoltgresType, val1 any, val2 any, val3 any) (any, error) {
+		if val1 == nil {
+			return nil, nil
+		}
+
+		array := val1.([]any)
+		searchElement := val2
+		start := val3.(int32)
+		arrayType := t[0]
+		baseType := arrayType.ArrayBaseType()
+
+		// Convert 1-indexed start position to 0-indexed
+		startIdx := int(start - 1)
+		if startIdx < 0 {
+			startIdx = 0
+		}
+		if startIdx >= len(array) {
+			return nil, nil
+		}
+
+		// Search for the element starting from the specified position
+		for i := startIdx; i < len(array); i++ {
+			cmp, err := baseType.Compare(ctx, array[i], searchElement)
+			if err != nil {
+				return nil, err
+			}
+			if cmp == 0 {
+				return int32(i + 1), nil // PostgreSQL uses 1-indexed arrays
+			}
+		}
+
+		// Element not found
+		return nil, nil
+	},
+}
+
+// array_positions_anyarray_anyelement represents the PostgreSQL function of the same name, taking the same parameters.
+var array_positions_anyarray_anyelement = framework.Function2{
+	Name:       "array_positions",
+	Return:     pgtypes.Int32Array,
+	Parameters: [2]*pgtypes.DoltgresType{pgtypes.AnyArray, pgtypes.AnyElement},
+	Strict:     false,
+	Callable: func(ctx *sql.Context, t [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
+		if val1 == nil {
+			return nil, nil
+		}
+
+		array := val1.([]any)
+		searchElement := val2
+		arrayType := t[0]
+		baseType := arrayType.ArrayBaseType()
+		var positions []any
+
+		// Search for all occurrences of the element
+		for i, element := range array {
+			cmp, err := baseType.Compare(ctx, element, searchElement)
+			if err != nil {
+				return nil, err
+			}
+			if cmp == 0 {
+				positions = append(positions, int32(i+1)) // PostgreSQL uses 1-indexed arrays
+			}
+		}
+
+		// Return array of positions, or empty array if no matches
+		return positions, nil
+	},
+}