61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
// Copyright 2018 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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// 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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"github.com/juju/errors"
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"github.com/pingcap/tidb/sessionctx"
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"github.com/pingcap/tidb/util/chunk"
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)
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type baseBitAggFunc struct {
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baseAggFunc
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}
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type bitOrUint64 struct {
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baseBitAggFunc
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}
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type partialResult4BitFunc = uint64
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func (e *baseBitAggFunc) AllocPartialResult() PartialResult {
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return PartialResult(new(partialResult4BitFunc))
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}
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func (e *baseBitAggFunc) ResetPartialResult(pr PartialResult) {
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p := (*partialResult4BitFunc)(pr)
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*p = 0
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}
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func (e *baseBitAggFunc) AppendFinalResult2Chunk(sctx sessionctx.Context, pr PartialResult, chk *chunk.Chunk) error {
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p := (*partialResult4BitFunc)(pr)
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chk.AppendUint64(e.ordinal, *p)
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return nil
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}
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func (e *bitOrUint64) UpdatePartialResult(sctx sessionctx.Context, rowsInGroup []chunk.Row, pr PartialResult) error {
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p := (*partialResult4BitFunc)(pr)
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for _, row := range rowsInGroup {
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inputValue, isNull, err := e.args[0].EvalInt(sctx, row)
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if err != nil {
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return errors.Trace(err)
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}
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if isNull {
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continue
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}
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*p |= uint64(inputValue)
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}
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return nil
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}
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