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 +1,125 @@
+// Copyright 2024 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 (
+	"strings"
+
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
+	"github.com/dolthub/dolt/go/libraries/doltcore/sqle/dsess"
+	"github.com/dolthub/dolt/go/libraries/doltcore/sqle/resolve"
+	"github.com/dolthub/go-mysql-server/sql"
+
+	"github.com/dolthub/doltgresql/core"
+	"github.com/dolthub/doltgresql/server/functions/framework"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// initPgGetSerialSequence registers the functions to the catalog.
+func initPgGetSerialSequence() {
+	framework.RegisterFunction(pg_get_serial_sequence_text_text)
+}
+
+// pg_get_serial_sequence_text_text represents the PostgreSQL function of the same name, taking the same parameters.
+var pg_get_serial_sequence_text_text = framework.Function2{
+	Name:               "pg_get_serial_sequence",
+	Return:             pgtypes.Text,
+	Parameters:         [2]*pgtypes.DoltgresType{pgtypes.Text, pgtypes.Text},
+	Variadic:           false,
+	IsNonDeterministic: false,
+	Strict:             true,
+	Callable: func(ctx *sql.Context, paramsAndReturn [3]*pgtypes.DoltgresType, val1 any, val2 any) (any, error) {
+		tableName := val1.(string)
+		columnName := val2.(string)
+
+		// Parse out the schema if one was supplied
+		var err error
+		schemaName := ""
+		if strings.Contains(tableName, ".") {
+			// TODO: ParseRelationName() will return the first schema from the search_path if one is not included
+			//       in the relation name, but that doesn't mean it's the correct schema. It should be updated to
+			//       not return any schema name if one wasn't explicitly specified, then we should search for the
+			//       table on the search_path and find the first schema that contains a table with that name.
+			schemaName, tableName, err = ParseRelationName(ctx, tableName)
+			if err != nil {
+				return nil, err
+			}
+		}
+
+		// Resolve the table's schema if it wasn't specified
+		if schemaName == "" {
+			doltSession := dsess.DSessFromSess(ctx.Session)
+			roots, ok := doltSession.GetRoots(ctx, ctx.GetCurrentDatabase())
+			if !ok {
+				return nil, errors.Errorf("unable to get roots")
+			}
+			foundTableName, _, ok, err := resolve.TableWithSearchPath(ctx, roots.Working, tableName)
+			if err != nil {
+				return nil, err
+			}
+			if !ok {
+				return nil, errors.Errorf(`relation "%s" does not exist`, tableName)
+			}
+			schemaName = foundTableName.Schema
+		}
+
+		// Validate the full schema + table name and grab the columns
+		table, err := core.GetSqlTableFromContext(ctx, "", doltdb.TableName{
+			Schema: schemaName,
+			Name:   tableName,
+		})
+		if err != nil {
+			return nil, err
+		}
+		if table == nil {
+			return nil, errors.Errorf(`relation "%s" does not exist`, tableName)
+		}
+		tableSchema := table.Schema(ctx)
+
+		// Find the column in the table's schema
+		columnIndex := tableSchema.IndexOfColName(columnName)
+		if columnIndex < 0 {
+			return nil, errors.Errorf(`column "%s" of relation "%s" does not exist`, columnName, tableName)
+		}
+		column := tableSchema[columnIndex]
+
+		stbl, ok := table.(sql.DatabaseSchemaTable)
+		if !ok {
+			return nil, errors.Errorf("table %s does not implement sql.DatabaseSchemaTable", tableName)
+		}
+
+		// Find any sequence associated with the column
+		sequenceCollection, err := core.GetSequencesCollectionFromContext(ctx, stbl.DatabaseSchema().Name())
+		if err != nil {
+			return nil, err
+		}
+		sequences, err := sequenceCollection.GetSequencesWithTable(ctx, doltdb.TableName{
+			Name:   tableName,
+			Schema: schemaName,
+		})
+		if err != nil {
+			return nil, err
+		}
+		for _, sequence := range sequences {
+			if sequence.OwnerColumn == column.Name {
+				// pg_get_serial_sequence() always includes the schema name in its output
+				return schemaName + "." + sequence.Id.SequenceName(), nil
+			}
+		}
+
+		return nil, nil
+	},
+}