wehub-resource-sync
109 lines
3.6 KiB
Go
109 lines
3.6 KiB
Go
// Copyright 2026 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 cast
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import (
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"github.com/cockroachdb/errors"
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/doltgresql/core/casts"
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"github.com/dolthub/doltgresql/core/id"
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"github.com/dolthub/doltgresql/postgres/parser/sem/tree"
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"github.com/dolthub/doltgresql/server/functions/framework"
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pgtypes "github.com/dolthub/doltgresql/server/types"
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)
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// initBit handles all casts that are built-in. This comprises only the source types.
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func initBit(builtInCasts map[id.Cast]casts.Cast) {
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bitExplicit(builtInCasts)
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bitImplicit(builtInCasts)
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}
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// bitExplicit registers all explicit casts. This comprises only the source types.
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func bitExplicit(builtInCasts map[id.Cast]casts.Cast) {
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bitToInt32 := id.NewCast(pgtypes.Bit.ID, pgtypes.Int32.ID)
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builtInCasts[bitToInt32] = casts.Cast{
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ID: bitToInt32,
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CastType: casts.CastType_Explicit,
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Function: id.NullFunction,
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BuiltIn: func(ctx *sql.Context, val any, _, targetType *pgtypes.DoltgresType) (any, error) {
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array, err := tree.ParseDBitArray(val.(string))
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if err != nil {
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return nil, err
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}
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if array.BitLen() > 32 {
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return nil, errors.Wrap(pgtypes.ErrCastOutOfRange, "integer out of range")
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}
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return int32(array.AsInt64(32)), nil
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},
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UseInOut: false,
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}
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bitToInt64 := id.NewCast(pgtypes.Bit.ID, pgtypes.Int64.ID)
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builtInCasts[bitToInt64] = casts.Cast{
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ID: bitToInt64,
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CastType: casts.CastType_Explicit,
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Function: id.NullFunction,
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BuiltIn: func(ctx *sql.Context, val any, _, targetType *pgtypes.DoltgresType) (any, error) {
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array, err := tree.ParseDBitArray(val.(string))
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if err != nil {
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return nil, err
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}
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if array.BitLen() > 64 {
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return nil, errors.Wrap(pgtypes.ErrCastOutOfRange, "bigint out of range")
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}
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return array.AsInt64(64), nil
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},
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UseInOut: false,
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}
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}
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// bitImplicit registers all implicit casts. This comprises only the source types.
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func bitImplicit(builtInCasts map[id.Cast]casts.Cast) {
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framework.MustAddImplicitTypeCast(builtInCasts, framework.TypeCast{
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FromType: pgtypes.Bit,
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ToType: pgtypes.Bit,
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Function: func(ctx *sql.Context, val any, _, targetType *pgtypes.DoltgresType) (any, error) {
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input := val.(string)
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array, err := tree.ParseDBitArray(input)
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if err != nil {
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return nil, err
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}
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expectedLength := targetType.GetAttTypMod()
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if array.BitLen() != uint(expectedLength) {
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return nil, pgtypes.ErrWrongLengthBit.New(len(input), expectedLength)
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}
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return tree.AsStringWithFlags(array, tree.FmtPgwireText), nil
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},
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})
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framework.MustAddImplicitTypeCast(builtInCasts, framework.TypeCast{
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FromType: pgtypes.Bit,
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ToType: pgtypes.VarBit,
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Function: func(ctx *sql.Context, val any, _, targetType *pgtypes.DoltgresType) (any, error) {
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input := val.(string)
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array, err := tree.ParseDBitArray(input)
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if err != nil {
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return nil, err
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}
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atttypmod := targetType.GetAttTypMod()
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if atttypmod != -1 {
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if int32(array.BitLen()) > atttypmod {
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return nil, pgtypes.ErrVarBitLengthExceeded.New(atttypmod)
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}
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}
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return tree.AsStringWithFlags(array, tree.FmtPgwireText), nil
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},
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})
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}
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