// Copyright 2018 PingCAP, Inc. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // See the License for the specific language governing permissions and // limitations under the License. package aggfuncs import ( "math" "github.com/pingcap/tidb/sessionctx" "github.com/pingcap/tidb/util/chunk" ) type baseBitAggFunc struct { baseAggFunc } type partialResult4BitFunc = uint64 func (e *baseBitAggFunc) AllocPartialResult() PartialResult { return PartialResult(new(partialResult4BitFunc)) } func (e *baseBitAggFunc) ResetPartialResult(pr PartialResult) { p := (*partialResult4BitFunc)(pr) *p = 0 } func (e *baseBitAggFunc) AppendFinalResult2Chunk(sctx sessionctx.Context, pr PartialResult, chk *chunk.Chunk) error { p := (*partialResult4BitFunc)(pr) chk.AppendUint64(e.ordinal, *p) return nil } type bitOrUint64 struct { baseBitAggFunc } func (e *bitOrUint64) UpdatePartialResult(sctx sessionctx.Context, rowsInGroup []chunk.Row, pr PartialResult) error { p := (*partialResult4BitFunc)(pr) for _, row := range rowsInGroup { inputValue, isNull, err := e.args[0].EvalInt(sctx, row) if err != nil { return err } if isNull { continue } *p |= uint64(inputValue) } return nil } func (*bitOrUint64) MergePartialResult(sctx sessionctx.Context, src, dst PartialResult) error { p1, p2 := (*partialResult4BitFunc)(src), (*partialResult4BitFunc)(dst) *p2 |= uint64(*p1) return nil } type bitXorUint64 struct { baseBitAggFunc } func (e *bitXorUint64) UpdatePartialResult(sctx sessionctx.Context, rowsInGroup []chunk.Row, pr PartialResult) error { p := (*partialResult4BitFunc)(pr) for _, row := range rowsInGroup { inputValue, isNull, err := e.args[0].EvalInt(sctx, row) if err != nil { return err } if isNull { continue } *p ^= uint64(inputValue) } return nil } func (*bitXorUint64) MergePartialResult(sctx sessionctx.Context, src, dst PartialResult) error { p1, p2 := (*partialResult4BitFunc)(src), (*partialResult4BitFunc)(dst) *p2 ^= uint64(*p1) return nil } type bitAndUint64 struct { baseBitAggFunc } func (e *bitAndUint64) AllocPartialResult() PartialResult { p := new(partialResult4BitFunc) *p = math.MaxUint64 return PartialResult(p) } func (e *bitAndUint64) ResetPartialResult(pr PartialResult) { p := (*partialResult4BitFunc)(pr) *p = math.MaxUint64 } func (e *bitAndUint64) UpdatePartialResult(sctx sessionctx.Context, rowsInGroup []chunk.Row, pr PartialResult) error { p := (*partialResult4BitFunc)(pr) for _, row := range rowsInGroup { inputValue, isNull, err := e.args[0].EvalInt(sctx, row) if err != nil { return err } if isNull { continue } *p &= uint64(inputValue) } return nil } func (*bitAndUint64) MergePartialResult(sctx sessionctx.Context, src, dst PartialResult) error { p1, p2 := (*partialResult4BitFunc)(src), (*partialResult4BitFunc)(dst) *p2 &= uint64(*p1) return nil }