wehub-resource-sync
87 lines
3.2 KiB
Go
87 lines
3.2 KiB
Go
// Copyright 2024 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package types
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import (
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/doltgresql/core/id"
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"github.com/dolthub/doltgresql/utils"
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)
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// BpChar is a char that has an unbounded length.
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var BpChar = &DoltgresType{
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ID: toInternal("bpchar"),
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TypLength: int16(-1),
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PassedByVal: false,
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TypType: TypeType_Base,
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TypCategory: TypeCategory_StringTypes,
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IsPreferred: false,
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IsDefined: true,
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Delimiter: ",",
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RelID: id.Null,
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SubscriptFunc: toFuncID("-"),
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Elem: internalNullType,
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Array: internalNullType,
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InputFunc: toFuncID("bpcharin", toInternal("cstring"), toInternal("oid"), toInternal("int4")),
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OutputFunc: toFuncID("bpcharout", toInternal("bpchar")),
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ReceiveFunc: toFuncID("bpcharrecv", toInternal("internal"), toInternal("oid"), toInternal("int4")),
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SendFunc: toFuncID("bpcharsend", toInternal("bpchar")),
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ModInFunc: toFuncID("bpchartypmodin", toInternal("_cstring")),
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ModOutFunc: toFuncID("bpchartypmodout", toInternal("int4")),
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AnalyzeFunc: toFuncID("-"),
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Align: TypeAlignment_Int,
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Storage: TypeStorage_Extended,
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NotNull: false,
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BaseTypeType: internalNullType,
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TypMod: -1,
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NDims: 0,
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TypCollation: id.NewCollation("pg_catalog", "default"),
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DefaulBin: "",
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Default: "",
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Acl: nil,
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Checks: nil,
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attTypMod: -1,
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CompareFunc: toFuncID("bpcharcmp", toInternal("bpchar"), toInternal("bpchar")),
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SerializationFunc: serializeTypeBpChar,
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DeserializationFunc: deserializeTypeBpChar,
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}
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// NewCharType returns BpChar type with typmod set.
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func NewCharType(length int32) (*DoltgresType, error) {
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typmod, err := GetTypModFromCharLength("char", length)
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if err != nil {
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return nil, err
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}
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newType := *BpChar.WithAttTypMod(typmod)
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return &newType, nil
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}
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// serializeTypeBpChar handles serialization from the standard representation to our serialized representation that is
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// written in Dolt.
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func serializeTypeBpChar(ctx *sql.Context, t *DoltgresType, val any) ([]byte, error) {
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str := val.(string)
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writer := utils.NewWriter(uint64(len(str) + 4))
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writer.String(str)
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return writer.Data(), nil
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}
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// deserializeTypeBpChar handles deserialization from the Dolt serialized format to our standard representation used by
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// expressions and nodes.
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func deserializeTypeBpChar(ctx *sql.Context, t *DoltgresType, data []byte) (any, error) {
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reader := utils.NewReader(data)
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return reader.String(), nil
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}
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