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354 lines
8.2 KiB
354 lines
8.2 KiB
// 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/pingcap/tidb/sessionctx"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util/chunk"
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"github.com/pingcap/tidb/util/hack"
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"github.com/pingcap/tidb/util/set"
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)
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type partialResult4SumFloat64 struct {
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val float64
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notNullRowCount int64
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}
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type partialResult4SumDecimal struct {
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val types.MyDecimal
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notNullRowCount int64
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}
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type partialResult4SumDistinctFloat64 struct {
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val float64
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isNull bool
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valSet set.Float64Set
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}
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type partialResult4SumDistinctDecimal struct {
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val types.MyDecimal
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isNull bool
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valSet set.StringSet
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}
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type baseSumAggFunc struct {
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baseAggFunc
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}
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type baseSum4Float64 struct {
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baseSumAggFunc
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}
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func (e *baseSum4Float64) AllocPartialResult() PartialResult {
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p := new(partialResult4SumFloat64)
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return PartialResult(p)
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}
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func (e *baseSum4Float64) ResetPartialResult(pr PartialResult) {
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p := (*partialResult4SumFloat64)(pr)
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p.val = 0
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p.notNullRowCount = 0
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}
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func (e *baseSum4Float64) AppendFinalResult2Chunk(sctx sessionctx.Context, pr PartialResult, chk *chunk.Chunk) error {
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p := (*partialResult4SumFloat64)(pr)
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if p.notNullRowCount == 0 {
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chk.AppendNull(e.ordinal)
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return nil
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}
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chk.AppendFloat64(e.ordinal, p.val)
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return nil
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}
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func (e *baseSum4Float64) UpdatePartialResult(sctx sessionctx.Context, rowsInGroup []chunk.Row, pr PartialResult) error {
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p := (*partialResult4SumFloat64)(pr)
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for _, row := range rowsInGroup {
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input, isNull, err := e.args[0].EvalReal(sctx, row)
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if err != nil {
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return 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.val += input
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p.notNullRowCount++
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}
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return nil
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}
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func (e *baseSum4Float64) MergePartialResult(sctx sessionctx.Context, src, dst PartialResult) error {
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p1, p2 := (*partialResult4SumFloat64)(src), (*partialResult4SumFloat64)(dst)
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if p1.notNullRowCount == 0 {
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return nil
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}
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p2.val += p1.val
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p2.notNullRowCount += p1.notNullRowCount
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return nil
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}
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type sum4Float64 struct {
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baseSum4Float64
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}
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func (e *sum4Float64) Slide(sctx sessionctx.Context, rows []chunk.Row, lastStart, lastEnd uint64, shiftStart, shiftEnd uint64, pr PartialResult) error {
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p := (*partialResult4SumFloat64)(pr)
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for i := uint64(0); i < shiftEnd; i++ {
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input, isNull, err := e.args[0].EvalReal(sctx, rows[lastEnd+i])
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if err != nil {
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return 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.val += input
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p.notNullRowCount++
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}
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for i := uint64(0); i < shiftStart; i++ {
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input, isNull, err := e.args[0].EvalReal(sctx, rows[lastStart+i])
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if err != nil {
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return 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.val -= input
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p.notNullRowCount--
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}
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return nil
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}
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type sum4Float64HighPrecision struct {
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baseSum4Float64
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}
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type sum4Decimal struct {
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baseSumAggFunc
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}
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func (e *sum4Decimal) AllocPartialResult() PartialResult {
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p := new(partialResult4SumDecimal)
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return PartialResult(p)
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}
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func (e *sum4Decimal) ResetPartialResult(pr PartialResult) {
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p := (*partialResult4SumDecimal)(pr)
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p.notNullRowCount = 0
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}
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func (e *sum4Decimal) AppendFinalResult2Chunk(sctx sessionctx.Context, pr PartialResult, chk *chunk.Chunk) error {
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p := (*partialResult4SumDecimal)(pr)
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if p.notNullRowCount == 0 {
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chk.AppendNull(e.ordinal)
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return nil
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}
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err := p.val.Round(&p.val, e.frac, types.ModeHalfEven)
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if err != nil {
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return err
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}
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chk.AppendMyDecimal(e.ordinal, &p.val)
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return nil
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}
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func (e *sum4Decimal) UpdatePartialResult(sctx sessionctx.Context, rowsInGroup []chunk.Row, pr PartialResult) error {
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p := (*partialResult4SumDecimal)(pr)
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for _, row := range rowsInGroup {
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input, isNull, err := e.args[0].EvalDecimal(sctx, row)
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if err != nil {
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return err
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}
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if isNull {
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continue
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}
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if p.notNullRowCount == 0 {
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p.val = *input
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p.notNullRowCount = 1
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continue
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}
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newSum := new(types.MyDecimal)
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err = types.DecimalAdd(&p.val, input, newSum)
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if err != nil {
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return err
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}
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p.val = *newSum
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p.notNullRowCount++
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}
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return nil
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}
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func (e *sum4Decimal) Slide(sctx sessionctx.Context, rows []chunk.Row, lastStart, lastEnd uint64, shiftStart, shiftEnd uint64, pr PartialResult) error {
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p := (*partialResult4SumDecimal)(pr)
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for i := uint64(0); i < shiftEnd; i++ {
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input, isNull, err := e.args[0].EvalDecimal(sctx, rows[lastEnd+i])
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if err != nil {
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return err
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}
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if isNull {
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continue
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}
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if p.notNullRowCount == 0 {
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p.val = *input
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p.notNullRowCount = 1
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continue
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}
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newSum := new(types.MyDecimal)
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err = types.DecimalAdd(&p.val, input, newSum)
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if err != nil {
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return err
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}
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p.val = *newSum
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p.notNullRowCount++
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}
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for i := uint64(0); i < shiftStart; i++ {
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input, isNull, err := e.args[0].EvalDecimal(sctx, rows[lastStart+i])
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if err != nil {
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return err
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}
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if isNull {
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continue
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}
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newSum := new(types.MyDecimal)
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err = types.DecimalSub(&p.val, input, newSum)
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if err != nil {
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return err
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}
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p.val = *newSum
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p.notNullRowCount--
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}
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return nil
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}
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func (e *sum4Decimal) MergePartialResult(sctx sessionctx.Context, src, dst PartialResult) error {
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p1, p2 := (*partialResult4SumDecimal)(src), (*partialResult4SumDecimal)(dst)
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if p1.notNullRowCount == 0 {
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return nil
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}
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newSum := new(types.MyDecimal)
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err := types.DecimalAdd(&p1.val, &p2.val, newSum)
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if err != nil {
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return err
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}
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p2.val = *newSum
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p2.notNullRowCount += p1.notNullRowCount
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return nil
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}
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type sum4DistinctFloat64 struct {
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baseSumAggFunc
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}
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func (e *sum4DistinctFloat64) AllocPartialResult() PartialResult {
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p := new(partialResult4SumDistinctFloat64)
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p.isNull = true
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p.valSet = set.NewFloat64Set()
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return PartialResult(p)
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}
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func (e *sum4DistinctFloat64) ResetPartialResult(pr PartialResult) {
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p := (*partialResult4SumDistinctFloat64)(pr)
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p.isNull = true
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p.valSet = set.NewFloat64Set()
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}
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func (e *sum4DistinctFloat64) UpdatePartialResult(sctx sessionctx.Context, rowsInGroup []chunk.Row, pr PartialResult) error {
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p := (*partialResult4SumDistinctFloat64)(pr)
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for _, row := range rowsInGroup {
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input, isNull, err := e.args[0].EvalReal(sctx, row)
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if err != nil {
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return err
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}
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if isNull || p.valSet.Exist(input) {
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continue
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}
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p.valSet.Insert(input)
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if p.isNull {
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p.val = input
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p.isNull = false
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continue
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}
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p.val += input
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}
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return nil
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}
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func (e *sum4DistinctFloat64) AppendFinalResult2Chunk(sctx sessionctx.Context, pr PartialResult, chk *chunk.Chunk) error {
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p := (*partialResult4SumDistinctFloat64)(pr)
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if p.isNull {
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chk.AppendNull(e.ordinal)
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return nil
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}
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chk.AppendFloat64(e.ordinal, p.val)
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return nil
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}
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type sum4DistinctDecimal struct {
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baseSumAggFunc
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}
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func (e *sum4DistinctDecimal) AllocPartialResult() PartialResult {
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p := new(partialResult4SumDistinctDecimal)
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p.isNull = true
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p.valSet = set.NewStringSet()
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return PartialResult(p)
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}
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func (e *sum4DistinctDecimal) ResetPartialResult(pr PartialResult) {
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p := (*partialResult4SumDistinctDecimal)(pr)
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p.isNull = true
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p.valSet = set.NewStringSet()
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}
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func (e *sum4DistinctDecimal) UpdatePartialResult(sctx sessionctx.Context, rowsInGroup []chunk.Row, pr PartialResult) error {
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p := (*partialResult4SumDistinctDecimal)(pr)
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for _, row := range rowsInGroup {
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input, isNull, err := e.args[0].EvalDecimal(sctx, row)
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if err != nil {
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return err
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}
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if isNull {
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continue
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}
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hash, err := input.ToHashKey()
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if err != nil {
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return err
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}
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decStr := string(hack.String(hash))
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if p.valSet.Exist(decStr) {
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continue
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}
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p.valSet.Insert(decStr)
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if p.isNull {
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p.val = *input
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p.isNull = false
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continue
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}
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newSum := new(types.MyDecimal)
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if err = types.DecimalAdd(&p.val, input, newSum); err != nil {
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return err
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}
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p.val = *newSum
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}
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return nil
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}
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func (e *sum4DistinctDecimal) AppendFinalResult2Chunk(sctx sessionctx.Context, pr PartialResult, chk *chunk.Chunk) error {
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p := (*partialResult4SumDistinctDecimal)(pr)
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if p.isNull {
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chk.AppendNull(e.ordinal)
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return nil
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}
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chk.AppendMyDecimal(e.ordinal, &p.val)
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return nil
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}
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