wehub-resource-sync
111 lines
3.9 KiB
Go
111 lines
3.9 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/cockroachdb/errors"
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"github.com/dolthub/go-mysql-server/sql"
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"github.com/dolthub/doltgresql/postgres/parser/timeofday"
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"github.com/dolthub/doltgresql/utils"
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"github.com/dolthub/doltgresql/core/id"
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)
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// Time is the time without a time zone. Precision is unbounded.
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var Time = &DoltgresType{
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ID: toInternal("time"),
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TypLength: int16(8),
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PassedByVal: true,
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TypType: TypeType_Base,
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TypCategory: TypeCategory_DateTimeTypes,
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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("time_in", toInternal("cstring"), toInternal("oid"), toInternal("int4")),
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OutputFunc: toFuncID("time_out", toInternal("time")),
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ReceiveFunc: toFuncID("time_recv", toInternal("internal"), toInternal("oid"), toInternal("int4")),
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SendFunc: toFuncID("time_send", toInternal("time")),
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ModInFunc: toFuncID("timetypmodin", toInternal("_cstring")),
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ModOutFunc: toFuncID("timetypmodout", toInternal("int4")),
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AnalyzeFunc: toFuncID("-"),
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Align: TypeAlignment_Double,
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Storage: TypeStorage_Plain,
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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.NullCollation,
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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("time_cmp", toInternal("time"), toInternal("time")),
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SerializationFunc: serializeTypeTime,
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DeserializationFunc: deserializeTypeTime,
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}
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// NewTimeType returns Time type with typmod set. // TODO: implement precision
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func NewTimeType(precision int32) (*DoltgresType, error) {
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typmod, err := GetTypmodFromTimePrecision(precision)
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if err != nil {
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return nil, err
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}
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newType := *Time.WithAttTypMod(typmod)
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return &newType, nil
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}
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// GetTypmodFromTimePrecision takes Time type precision and returns the type modifier value.
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func GetTypmodFromTimePrecision(precision int32) (int32, error) {
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if precision < 0 {
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// TIME(-1) precision must not be negative
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return 0, errors.Errorf("TIME(%v) precision must be not be negative", precision)
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}
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if precision > 6 {
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precision = 6
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//WARNING: TIME(7) precision reduced to maximum allowed, 6
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}
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return precision, nil
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}
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// GetTimePrecisionFromTypMod takes Time type modifier and returns precision value.
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func GetTimePrecisionFromTypMod(typmod int32) int32 {
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return typmod
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}
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// serializeTypeTime handles serialization from the standard representation to our serialized representation that is
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// written in Dolt.
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func serializeTypeTime(ctx *sql.Context, t *DoltgresType, val any) ([]byte, error) {
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v := val.(timeofday.TimeOfDay)
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writer := utils.NewWriter(8)
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writer.Int64(int64(v))
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return writer.Data(), nil
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}
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// deserializeTypeTime 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 deserializeTypeTime(ctx *sql.Context, _ *DoltgresType, data []byte) (any, error) {
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if len(data) == 0 {
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return nil, nil
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}
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reader := utils.NewReader(data)
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return timeofday.TimeOfDay(reader.Int64()), nil
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}
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