113 lines
3.5 KiB
Go
113 lines
3.5 KiB
Go
// Copyright 2020 PingCAP, 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 aggfuncs
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import (
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"unsafe"
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"github.com/pingcap/errors"
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"github.com/pingcap/tidb/pkg/types"
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"github.com/pingcap/tidb/pkg/util/chunk"
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)
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const (
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// DefPartialResult4JsonArrayagg is the size of partialResult4JsonArrayagg
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DefPartialResult4JsonArrayagg = int64(unsafe.Sizeof(partialResult4JsonArrayagg{}))
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)
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type jsonArrayagg struct {
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baseAggFunc
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}
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type partialResult4JsonArrayagg struct {
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entries []any
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}
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func (*jsonArrayagg) AllocPartialResult() (pr PartialResult, memDelta int64) {
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p := partialResult4JsonArrayagg{}
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p.entries = make([]any, 0)
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return PartialResult(&p), DefPartialResult4JsonArrayagg + DefSliceSize
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}
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func (*jsonArrayagg) ResetPartialResult(pr PartialResult) {
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p := (*partialResult4JsonArrayagg)(pr)
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p.entries = p.entries[:0]
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}
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func (e *jsonArrayagg) AppendFinalResult2Chunk(_ AggFuncUpdateContext, pr PartialResult, chk *chunk.Chunk) error {
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p := (*partialResult4JsonArrayagg)(pr)
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if len(p.entries) == 0 {
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chk.AppendNull(e.ordinal)
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return nil
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}
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json, err := types.CreateBinaryJSONWithCheck(p.entries)
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if err != nil {
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return errors.Trace(err)
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}
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chk.AppendJSON(e.ordinal, json)
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return nil
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}
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func (e *jsonArrayagg) UpdatePartialResult(ctx AggFuncUpdateContext, rowsInGroup []chunk.Row, pr PartialResult) (memDelta int64, err error) {
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p := (*partialResult4JsonArrayagg)(pr)
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for _, row := range rowsInGroup {
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item, err := e.args[0].Eval(ctx, row)
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if err != nil {
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return 0, errors.Trace(err)
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}
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realItem, err := getRealJSONValue(item, e.args[0].GetType(ctx))
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if err != nil {
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return 0, errors.Trace(err)
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}
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switch x := realItem.(type) {
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case nil, bool, int64, uint64, float64, string, types.BinaryJSON, types.Opaque, types.Time, types.Duration:
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p.entries = append(p.entries, realItem)
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memDelta += getValMemDelta(realItem)
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default:
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return 0, types.ErrUnsupportedSecondArgumentType.GenWithStackByArgs(x)
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}
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}
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return memDelta, nil
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}
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func (*jsonArrayagg) MergePartialResult(_ AggFuncUpdateContext, src, dst PartialResult) (memDelta int64, err error) {
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p1, p2 := (*partialResult4JsonArrayagg)(src), (*partialResult4JsonArrayagg)(dst)
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p2.entries = append(p2.entries, p1.entries...)
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return 0, nil
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}
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func (e *jsonArrayagg) SerializePartialResult(partialResult PartialResult, chk *chunk.Chunk, spillHelper *SerializeHelper) {
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pr := (*partialResult4JsonArrayagg)(partialResult)
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resBuf := spillHelper.serializePartialResult4JsonArrayagg(*pr)
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chk.AppendBytes(e.ordinal, resBuf)
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}
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func (e *jsonArrayagg) DeserializePartialResult(src *chunk.Chunk) ([]PartialResult, int64) {
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return deserializePartialResultCommon(src, e.ordinal, e.deserializeForSpill)
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}
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func (e *jsonArrayagg) deserializeForSpill(helper *deserializeHelper) (PartialResult, int64) {
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pr, memDelta := e.AllocPartialResult()
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result := (*partialResult4JsonArrayagg)(pr)
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success := helper.deserializePartialResult4JsonArrayagg(result)
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if !success {
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return nil, 0
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}
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return pr, memDelta
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}
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