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 +1,96 @@
+// 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 types
+
+import (
+	"github.com/dolthub/go-mysql-server/sql"
+	"gopkg.in/src-d/go-errors.v1"
+
+	"github.com/dolthub/doltgresql/utils"
+
+	"github.com/dolthub/doltgresql/core/id"
+)
+
+// ErrWrongLengthBit is returned when a value with the incorrect length is inserted into a Bit column.
+var ErrWrongLengthBit = errors.NewKind(`bit string length %d does not match type bit(%d)`)
+
+// Bit is a fixed-length bit string.
+var Bit = &DoltgresType{
+	ID:                  toInternal("bit"),
+	TypLength:           int16(-1),
+	PassedByVal:         false,
+	TypType:             TypeType_Base,
+	TypCategory:         TypeCategory_BitStringTypes,
+	IsPreferred:         false,
+	IsDefined:           true,
+	Delimiter:           ",",
+	RelID:               id.Null,
+	SubscriptFunc:       toFuncID("-"),
+	Elem:                internalNullType,
+	Array:               internalNullType,
+	InputFunc:           toFuncID("bit_in", toInternal("cstring"), toInternal("oid"), toInternal("int4")),
+	OutputFunc:          toFuncID("bit_out", toInternal("bit")),
+	ReceiveFunc:         toFuncID("bit_recv", toInternal("internal"), toInternal("oid"), toInternal("int4")),
+	SendFunc:            toFuncID("bit_send", toInternal("bit")),
+	ModInFunc:           toFuncID("bittypmodin", toInternal("_cstring")),
+	ModOutFunc:          toFuncID("bittypmodout", toInternal("int4")),
+	AnalyzeFunc:         toFuncID("-"),
+	Align:               TypeAlignment_Int,
+	Storage:             TypeStorage_Extended,
+	NotNull:             false,
+	BaseTypeType:        internalNullType,
+	TypMod:              -1,
+	NDims:               0,
+	TypCollation:        id.NewCollation("pg_catalog", "default"),
+	DefaulBin:           "",
+	Default:             "",
+	Acl:                 nil,
+	Checks:              nil,
+	attTypMod:           -1,
+	CompareFunc:         toFuncID("bitcmp", toInternal("bit"), toInternal("bit")),
+	SerializationFunc:   serializeTypeBit,
+	DeserializationFunc: deserializeTypeBit,
+}
+
+// NewBitType returns a Bit type with type modifier set
+// representing the number of bits in the string.
+func NewBitType(width int32) (*DoltgresType, error) {
+	if width < 1 {
+		return nil, ErrLengthMustBeAtLeast1.New("bit")
+	} else if width > StringMaxLength {
+		return nil, ErrLengthCannotExceed.New("bit")
+	}
+	newType := *Bit.WithAttTypMod(width)
+	return &newType, nil
+}
+
+// serializeTypeBit handles serialization from the standard representation to our serialized representation that is
+// written in Dolt.
+func serializeTypeBit(ctx *sql.Context, t *DoltgresType, val any) ([]byte, error) {
+	str := val.(string)
+	wr := utils.NewWriter(uint64(4 + len(str)))
+	wr.String(str)
+	return wr.Data(), nil
+}
+
+// deserializeTypeBit handles deserialization from the Dolt serialized format to our standard representation used by
+// expressions and nodes.
+func deserializeTypeBit(ctx *sql.Context, t *DoltgresType, data []byte) (any, error) {
+	if len(data) == 0 {
+		return nil, nil
+	}
+	reader := utils.NewReader(data)
+	return reader.String(), nil
+}