wehub-resource-sync
95 lines
3.5 KiB
Go
95 lines
3.5 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 cast
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import (
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"math"
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"github.com/cockroachdb/apd/v3"
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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/server/functions/framework"
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pgtypes "github.com/dolthub/doltgresql/server/types"
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)
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// initFloat32 handles all casts that are built-in. This comprises only the source types.
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func initFloat32(builtInCasts map[id.Cast]casts.Cast) {
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float32Assignment(builtInCasts)
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float32Implicit(builtInCasts)
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}
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// float32Assignment registers all assignment casts. This comprises only the source types.
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func float32Assignment(builtInCasts map[id.Cast]casts.Cast) {
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framework.MustAddAssignmentTypeCast(builtInCasts, framework.TypeCast{
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FromType: pgtypes.Float32,
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ToType: pgtypes.Int16,
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Function: func(ctx *sql.Context, valInterface any, _, targetType *pgtypes.DoltgresType) (any, error) {
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val := float32(math.RoundToEven(float64(valInterface.(float32))))
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if val > 32767 || val < -32768 {
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return nil, errors.Wrap(pgtypes.ErrCastOutOfRange, "smallint out of range")
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}
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return int16(val), nil
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},
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})
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framework.MustAddAssignmentTypeCast(builtInCasts, framework.TypeCast{
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FromType: pgtypes.Float32,
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ToType: pgtypes.Int32,
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Function: func(ctx *sql.Context, valInterface any, _, targetType *pgtypes.DoltgresType) (any, error) {
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val := float32(math.RoundToEven(float64(valInterface.(float32))))
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if val > 2147483647 || val < -2147483648 {
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return nil, errors.Wrap(pgtypes.ErrCastOutOfRange, "integer out of range")
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}
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return int32(val), nil
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},
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})
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framework.MustAddAssignmentTypeCast(builtInCasts, framework.TypeCast{
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FromType: pgtypes.Float32,
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ToType: pgtypes.Int64,
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Function: func(ctx *sql.Context, valInterface any, _, targetType *pgtypes.DoltgresType) (any, error) {
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val := float32(math.RoundToEven(float64(valInterface.(float32))))
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if val > 9223372036854775807 || val < -9223372036854775808 {
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return nil, errors.Wrap(pgtypes.ErrCastOutOfRange, "bigint out of range")
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}
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return int64(val), nil
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},
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})
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framework.MustAddAssignmentTypeCast(builtInCasts, framework.TypeCast{
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FromType: pgtypes.Float32,
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ToType: pgtypes.Numeric,
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Function: func(ctx *sql.Context, val any, _, targetType *pgtypes.DoltgresType) (any, error) {
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d := new(apd.Decimal)
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err := d.Scan(float64(val.(float32)))
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if err != nil {
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return nil, err
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}
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return pgtypes.GetNumericValueWithTypmod(d, targetType.GetAttTypMod())
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},
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})
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}
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// float32Implicit registers all implicit casts. This comprises only the source types.
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func float32Implicit(builtInCasts map[id.Cast]casts.Cast) {
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framework.MustAddImplicitTypeCast(builtInCasts, framework.TypeCast{
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FromType: pgtypes.Float32,
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ToType: pgtypes.Float64,
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Function: func(ctx *sql.Context, val any, _, targetType *pgtypes.DoltgresType) (any, error) {
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return float64(val.(float32)), nil
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},
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})
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}
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