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 +1,95 @@
+// 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 (
+	"github.com/cockroachdb/errors"
+	"github.com/dolthub/go-mysql-server/sql"
+
+	"github.com/dolthub/doltgresql/utils"
+
+	"github.com/dolthub/doltgresql/server/functions/framework"
+	pgtypes "github.com/dolthub/doltgresql/server/types"
+)
+
+// initUnknown registers the functions to the catalog.
+func initUnknown() {
+	framework.RegisterFunction(unknownin)
+	framework.RegisterFunction(unknownout)
+	framework.RegisterFunction(unknownrecv)
+	framework.RegisterFunction(unknownsend)
+}
+
+// unknownin represents the PostgreSQL function of unknown type IO input.
+var unknownin = framework.Function1{
+	Name:       "unknownin",
+	Return:     pgtypes.Unknown,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Cstring},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		return val.(string), nil
+	},
+}
+
+// unknownout represents the PostgreSQL function of unknown type IO output.
+var unknownout = framework.Function1{
+	Name:       "unknownout",
+	Return:     pgtypes.Cstring,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Unknown},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		return val.(string), nil
+	},
+}
+
+// unknownrecv represents the PostgreSQL function of unknown type IO receive.
+var unknownrecv = framework.Function1{
+	Name:       "unknownrecv",
+	Return:     pgtypes.Unknown,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Internal},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		data := val.([]byte)
+		reader := utils.NewReader(data)
+		return reader.String(), nil
+	},
+}
+
+// unknownsend represents the PostgreSQL function of unknown type IO send.
+var unknownsend = framework.Function1{
+	Name:       "unknownsend",
+	Return:     pgtypes.Bytea,
+	Parameters: [1]*pgtypes.DoltgresType{pgtypes.Unknown},
+	Strict:     true,
+	Callable: func(ctx *sql.Context, _ [2]*pgtypes.DoltgresType, val any) (any, error) {
+		if wrapper, ok := val.(sql.AnyWrapper); ok {
+			var err error
+			val, err = wrapper.UnwrapAny(ctx)
+			if err != nil {
+				return nil, err
+			}
+			if val == nil {
+				return nil, nil
+			}
+		}
+		str, ok := val.(string)
+		if !ok {
+			return nil, errors.Errorf(`non-string value encountered while converting "UNKNOWN" to binary wire format:\n%T`, val)
+		}
+		writer := utils.NewWireWriter()
+		writer.WriteString(str)
+		return writer.BufferData(), nil
+	},
+}