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 +1,168 @@
+// 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 (
+	"strconv"
+	"strings"
+
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/go-mysql-server/sql"
+	"github.com/lib/pq/oid"
+
+	"github.com/dolthub/doltgresql/core/id"
+	"github.com/dolthub/doltgresql/postgres/parser/types"
+	"github.com/dolthub/doltgresql/server/functions/framework"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+	"github.com/dolthub/doltgresql/utils"
+)
+
+// initRegtype registers the functions to the catalog.
+func initRegtype() {
+	framework.RegisterFunction(regtypein)
+	framework.RegisterFunction(regtypeout)
+	framework.RegisterFunction(regtyperecv)
+	framework.RegisterFunction(regtypesend)
+}
+
+// regtypein represents the PostgreSQL function of regtype type IO input.
+var regtypein = framework.Function1{
+	Name:       "regtypein",
+	Return:     pgtypes.Regtype,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Cstring},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		// If the string just represents a number, then we return it.
+		input := val.(string)
+		if parsedOid, err := strconv.ParseUint(input, 10, 32); err == nil {
+			if internalID := id.Cache().ToInternal(uint32(parsedOid)); internalID.IsValid() {
+				return internalID, nil
+			}
+			return id.NewOID(uint32(parsedOid)).AsId(), nil
+		}
+		sections, err := ioInputSections(input)
+		if err != nil {
+			return id.Null, err
+		}
+		if err = regtype_IoInputValidation(ctx, input, sections); err != nil {
+			return id.Null, err
+		}
+		var schema string
+		var typeName string
+		switch len(sections) {
+		case 1:
+			// TODO: we should make use of the search path, but it needs to include an implicit "pg_catalog" before we can
+			typeName = sections[0]
+		case 3:
+			// TODO: sections[0] is the schema that we need to search in
+			schema = sections[0]
+			typeName = sections[2]
+			if schema == "pg_catalog" && typeName == "char" { // Sad but true
+				typeName = `"char"`
+			}
+		default:
+			return id.Null, errors.Errorf("regtype failed validation")
+		}
+		// Remove everything after the first parenthesis
+		typeName = strings.Split(typeName, "(")[0]
+
+		if typeName == "char" && schema == "" {
+			return id.NewType("pg_catalog", "bpchar").AsId(), nil
+		}
+		if typeName == "int" {
+			typeName = "int4"
+		}
+		if internalID, ok := pgtypes.NameToInternalID[typeName]; ok && (internalID.SchemaName() == schema || schema == "") {
+			return internalID.AsId(), nil
+		}
+		return id.Null, pgtypes.ErrTypeDoesNotExist.New(input)
+	},
+}
+
+// regtypeout represents the PostgreSQL function of regtype type IO output.
+var regtypeout = framework.Function1{
+	Name:       "regtypeout",
+	Return:     pgtypes.Cstring,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Regtype},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		internalID := val.(id.Id)
+		if internalID.Section() == id.Section_OID {
+			return internalID.Segment(0), nil
+		}
+		toid := id.Cache().ToOID(internalID)
+		if t, ok := types.OidToType[oid.Oid(toid)]; ok {
+			return t.SQLStandardName(), nil
+		} else {
+			return internalID.Segment(1), nil
+		}
+	},
+}
+
+// regtyperecv represents the PostgreSQL function of regtype type IO receive.
+var regtyperecv = framework.Function1{
+	Name:       "regtyperecv",
+	Return:     pgtypes.Regtype,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Internal},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		data := val.([]byte)
+		if data == nil {
+			return nil, nil
+		}
+		reader := utils.NewWireReader(data)
+		cachedID := id.Cache().ToInternal(reader.ReadUint32())
+		return cachedID, nil
+	},
+}
+
+// regtypesend represents the PostgreSQL function of regtype type IO send.
+var regtypesend = framework.Function1{
+	Name:       "regtypesend",
+	Return:     pgtypes.Bytea,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Regtype},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		writer := utils.NewWireWriter()
+		writer.WriteUint32(id.Cache().ToOID(val.(id.Id)))
+		return writer.BufferData(), nil
+	},
+}
+
+// regtype_IoInputValidation handles the validation for the parsed sections in regtypein.
+func regtype_IoInputValidation(ctx *sql.Context, input string, sections []string) error {
+	switch len(sections) {
+	case 1:
+		return nil
+	case 3:
+		// We check for name validity before checking the schema name
+		if sections[1] != "." {
+			return errors.Errorf("invalid name syntax")
+		}
+		return nil
+	case 5:
+		if sections[1] != "." || sections[3] != "." {
+			return errors.Errorf("invalid name syntax")
+		}
+		return errors.Errorf("cross-database references are not implemented: %s", input)
+	case 7:
+		if sections[1] != "." || sections[3] != "." || sections[5] != "." {
+			return errors.Errorf("invalid name syntax")
+		}
+		return errors.Errorf("improper qualified name (too many dotted names): %s", input)
+	default:
+		return errors.Errorf("invalid name syntax")
+	}
+}