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831 lines
19 KiB
831 lines
19 KiB
// Copyright 2019 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 expression
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import (
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"github.com/pingcap/parser/mysql"
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"github.com/pingcap/tidb/types"
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"github.com/pingcap/tidb/util/chunk"
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)
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// vecEvalDecimal evals a builtinGreatestDecimalSig.
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// See http://dev.mysql.com/doc/refman/5.7/en/comparison-operators.html#function_greatest
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func (b *builtinGreatestDecimalSig) vecEvalDecimal(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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buf, err := b.bufAllocator.get(types.ETDecimal, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf)
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if err := b.args[0].VecEvalDecimal(b.ctx, input, result); err != nil {
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return err
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}
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d64s := result.Decimals()
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for j := 1; j < len(b.args); j++ {
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if err := b.args[j].VecEvalDecimal(b.ctx, input, buf); err != nil {
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return err
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}
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for i := 0; i < n; i++ {
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if result.IsNull(i) {
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continue
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} else if buf.IsNull(i) {
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result.SetNull(i, true)
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continue
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}
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v := buf.GetDecimal(i)
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if v.Compare(&d64s[i]) > 0 {
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d64s[i] = *v
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}
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}
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}
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return nil
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}
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func (b *builtinGreatestDecimalSig) vectorized() bool {
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return true
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}
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func (b *builtinLeastDecimalSig) vecEvalDecimal(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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buf, err := b.bufAllocator.get(types.ETDecimal, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf)
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if err := b.args[0].VecEvalDecimal(b.ctx, input, result); err != nil {
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return err
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}
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d64s := result.Decimals()
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for j := 1; j < len(b.args); j++ {
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if err := b.args[j].VecEvalDecimal(b.ctx, input, buf); err != nil {
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return err
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}
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result.MergeNulls(buf)
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for i := 0; i < n; i++ {
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if result.IsNull(i) {
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continue
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}
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v := buf.GetDecimal(i)
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if v.Compare(&d64s[i]) < 0 {
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d64s[i] = *v
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}
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}
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}
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return nil
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}
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func (b *builtinLeastDecimalSig) vectorized() bool {
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return true
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}
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func (b *builtinLeastIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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buf, err := b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf)
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if err := b.args[0].VecEvalInt(b.ctx, input, result); err != nil {
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return err
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}
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i64s := result.Int64s()
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for j := 1; j < len(b.args); j++ {
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if err := b.args[j].VecEvalInt(b.ctx, input, buf); err != nil {
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return err
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}
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result.MergeNulls(buf)
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for i := 0; i < n; i++ {
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if result.IsNull(i) {
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continue
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}
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v := buf.GetInt64(i)
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if v < i64s[i] {
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i64s[i] = v
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}
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}
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}
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return nil
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}
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func (b *builtinLeastIntSig) vectorized() bool {
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return true
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}
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func (b *builtinGreatestIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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buf, err := b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf)
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if err := b.args[0].VecEvalInt(b.ctx, input, result); err != nil {
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return err
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}
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i64s := result.Int64s()
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for j := 1; j < len(b.args); j++ {
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if err := b.args[j].VecEvalInt(b.ctx, input, buf); err != nil {
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return err
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}
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result.MergeNulls(buf)
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v := buf.Int64s()
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for i := 0; i < n; i++ {
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if result.IsNull(i) {
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continue
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}
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if v[i] > i64s[i] {
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i64s[i] = v[i]
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}
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}
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}
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return nil
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}
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func (b *builtinGreatestIntSig) vectorized() bool {
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return true
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}
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func (b *builtinGEIntSig) vectorized() bool {
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return true
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}
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func (b *builtinGEIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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var err error
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var buf0, buf1 *chunk.Column
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buf0, err = b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf0)
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if err = b.args[0].VecEvalInt(b.ctx, input, buf0); err != nil {
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return err
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}
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buf1, err = b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf1)
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if err = b.args[1].VecEvalInt(b.ctx, input, buf1); err != nil {
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return err
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}
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result.ResizeInt64(n, false)
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vecCompareInt(mysql.HasUnsignedFlag(b.args[0].GetType().Flag), mysql.HasUnsignedFlag(b.args[1].GetType().Flag), buf0, buf1, result)
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result.MergeNulls(buf0, buf1)
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vecResOfGE(result.Int64s())
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return nil
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}
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func (b *builtinLeastRealSig) vectorized() bool {
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return true
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}
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func (b *builtinLeastRealSig) vecEvalReal(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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buf, err := b.bufAllocator.get(types.ETReal, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf)
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if err := b.args[0].VecEvalReal(b.ctx, input, result); err != nil {
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return err
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}
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f64s := result.Float64s()
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for j := 1; j < len(b.args); j++ {
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if err := b.args[j].VecEvalReal(b.ctx, input, buf); err != nil {
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return err
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}
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result.MergeNulls(buf)
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v := buf.Float64s()
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for i := 0; i < n; i++ {
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if result.IsNull(i) {
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continue
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}
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if v[i] < f64s[i] {
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f64s[i] = v[i]
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}
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}
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}
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return nil
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}
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func (b *builtinLeastStringSig) vectorized() bool {
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return true
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}
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func (b *builtinLeastStringSig) vecEvalString(input *chunk.Chunk, result *chunk.Column) error {
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if err := b.args[0].VecEvalString(b.ctx, input, result); err != nil {
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return err
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}
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n := input.NumRows()
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buf1, err := b.bufAllocator.get(types.ETString, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf1)
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buf2, err := b.bufAllocator.get(types.ETString, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf2)
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src := result
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arg := buf1
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dst := buf2
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dst.ReserveString(n)
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for j := 1; j < len(b.args); j++ {
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if err := b.args[j].VecEvalString(b.ctx, input, arg); err != nil {
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return err
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}
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for i := 0; i < n; i++ {
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if src.IsNull(i) || arg.IsNull(i) {
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dst.AppendNull()
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continue
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}
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srcStr := src.GetString(i)
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argStr := arg.GetString(i)
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if types.CompareString(srcStr, argStr, b.collation) < 0 {
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dst.AppendString(srcStr)
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} else {
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dst.AppendString(argStr)
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}
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}
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src, dst = dst, src
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arg.ReserveString(n)
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dst.ReserveString(n)
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}
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if len(b.args)%2 == 0 {
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src.CopyConstruct(result)
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}
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return nil
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}
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func (b *builtinEQIntSig) vectorized() bool {
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return true
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}
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func (b *builtinEQIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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var err error
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var buf0, buf1 *chunk.Column
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buf0, err = b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf0)
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if err := b.args[0].VecEvalInt(b.ctx, input, buf0); err != nil {
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return err
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}
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buf1, err = b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf1)
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if err := b.args[1].VecEvalInt(b.ctx, input, buf1); err != nil {
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return err
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}
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result.ResizeInt64(n, false)
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vecCompareInt(mysql.HasUnsignedFlag(b.args[0].GetType().Flag), mysql.HasUnsignedFlag(b.args[1].GetType().Flag), buf0, buf1, result)
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result.MergeNulls(buf0, buf1)
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vecResOfEQ(result.Int64s())
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return nil
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}
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func (b *builtinNEIntSig) vectorized() bool {
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return true
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}
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func (b *builtinNEIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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var err error
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var buf0, buf1 *chunk.Column
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buf0, err = b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf0)
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if err := b.args[0].VecEvalInt(b.ctx, input, buf0); err != nil {
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return err
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}
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buf1, err = b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf1)
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if err := b.args[1].VecEvalInt(b.ctx, input, buf1); err != nil {
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return err
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}
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result.ResizeInt64(n, false)
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vecCompareInt(mysql.HasUnsignedFlag(b.args[0].GetType().Flag), mysql.HasUnsignedFlag(b.args[1].GetType().Flag), buf0, buf1, result)
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result.MergeNulls(buf0, buf1)
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vecResOfNE(result.Int64s())
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return nil
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}
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func (b *builtinGTIntSig) vectorized() bool {
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return true
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}
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func (b *builtinGTIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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var err error
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var buf0, buf1 *chunk.Column
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buf0, err = b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf0)
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if err := b.args[0].VecEvalInt(b.ctx, input, buf0); err != nil {
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return err
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}
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buf1, err = b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf1)
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if err := b.args[1].VecEvalInt(b.ctx, input, buf1); err != nil {
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return err
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}
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result.ResizeInt64(n, false)
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vecCompareInt(mysql.HasUnsignedFlag(b.args[0].GetType().Flag), mysql.HasUnsignedFlag(b.args[1].GetType().Flag), buf0, buf1, result)
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result.MergeNulls(buf0, buf1)
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vecResOfGT(result.Int64s())
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return nil
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}
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func (b *builtinNullEQIntSig) vectorized() bool {
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return true
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}
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func (b *builtinNullEQIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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buf0, err := b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf0)
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if err := b.args[0].VecEvalInt(b.ctx, input, buf0); err != nil {
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return err
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}
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buf1, err := b.bufAllocator.get(types.ETInt, n)
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if err != nil {
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return err
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}
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defer b.bufAllocator.put(buf1)
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result.ResizeInt64(n, false)
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if err := b.args[1].VecEvalInt(b.ctx, input, buf1); err != nil {
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return err
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}
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vecCompareInt(mysql.HasUnsignedFlag(b.args[0].GetType().Flag), mysql.HasUnsignedFlag(b.args[1].GetType().Flag), buf0, buf1, result)
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i64s := result.Int64s()
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for i := 0; i < n; i++ {
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isNull0 := buf0.IsNull(i)
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isNull1 := buf1.IsNull(i)
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if isNull0 && isNull1 {
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i64s[i] = 1
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} else if isNull0 || isNull1 || i64s[i] != 0 {
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i64s[i] = 0
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} else {
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i64s[i] = 1
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}
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}
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return nil
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}
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func (b *builtinIntervalIntSig) vectorized() bool {
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return true
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}
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func (b *builtinIntervalIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
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var err error
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if err = b.args[0].VecEvalInt(b.ctx, input, result); err != nil {
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return err
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}
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i64s := result.Int64s()
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var idx int
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for i, v := range i64s {
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if result.IsNull(i) {
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result.SetNull(i, false)
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i64s[i] = -1
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continue
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}
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if b.hasNullable {
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idx, err = b.linearSearch(v, mysql.HasUnsignedFlag(b.args[0].GetType().Flag), b.args[1:], input.GetRow(i))
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} else {
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idx, err = b.binSearch(v, mysql.HasUnsignedFlag(b.args[0].GetType().Flag), b.args[1:], input.GetRow(i))
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}
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if err != nil {
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return err
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}
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i64s[i] = int64(idx)
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}
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return nil
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}
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|
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func (b *builtinIntervalRealSig) vectorized() bool {
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return true
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}
|
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|
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func (b *builtinIntervalRealSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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buf, err := b.bufAllocator.get(types.ETReal, n)
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if err != nil {
|
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return err
|
|
}
|
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defer b.bufAllocator.put(buf)
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if err = b.args[0].VecEvalReal(b.ctx, input, buf); err != nil {
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return err
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}
|
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|
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f64s := buf.Float64s()
|
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result.ResizeInt64(n, false)
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res := result.Int64s()
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var idx int
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for i := 0; i < n; i++ {
|
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if buf.IsNull(i) {
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res[i] = -1
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continue
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}
|
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if b.hasNullable {
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idx, err = b.linearSearch(f64s[i], b.args[1:], input.GetRow(i))
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} else {
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idx, err = b.binSearch(f64s[i], b.args[1:], input.GetRow(i))
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}
|
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if err != nil {
|
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return err
|
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}
|
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res[i] = int64(idx)
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}
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return nil
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}
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|
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func (b *builtinLEIntSig) vectorized() bool {
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return true
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}
|
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|
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func (b *builtinLEIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
|
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n := input.NumRows()
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var err error
|
|
var buf0, buf1 *chunk.Column
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buf0, err = b.bufAllocator.get(types.ETInt, n)
|
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if err != nil {
|
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return err
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}
|
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defer b.bufAllocator.put(buf0)
|
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if err := b.args[0].VecEvalInt(b.ctx, input, buf0); err != nil {
|
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return err
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}
|
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buf1, err = b.bufAllocator.get(types.ETInt, n)
|
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if err != nil {
|
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return err
|
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}
|
|
defer b.bufAllocator.put(buf1)
|
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if err := b.args[1].VecEvalInt(b.ctx, input, buf1); err != nil {
|
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return err
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}
|
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|
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result.ResizeInt64(n, false)
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vecCompareInt(mysql.HasUnsignedFlag(b.args[0].GetType().Flag), mysql.HasUnsignedFlag(b.args[1].GetType().Flag), buf0, buf1, result)
|
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result.MergeNulls(buf0, buf1)
|
|
vecResOfLE(result.Int64s())
|
|
return nil
|
|
}
|
|
|
|
func (b *builtinLTIntSig) vectorized() bool {
|
|
return true
|
|
}
|
|
|
|
func (b *builtinLTIntSig) vecEvalInt(input *chunk.Chunk, result *chunk.Column) error {
|
|
n := input.NumRows()
|
|
var err error
|
|
var buf0, buf1 *chunk.Column
|
|
buf0, err = b.bufAllocator.get(types.ETInt, n)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer b.bufAllocator.put(buf0)
|
|
if err := b.args[0].VecEvalInt(b.ctx, input, buf0); err != nil {
|
|
return err
|
|
}
|
|
buf1, err = b.bufAllocator.get(types.ETInt, n)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer b.bufAllocator.put(buf1)
|
|
if err := b.args[1].VecEvalInt(b.ctx, input, buf1); err != nil {
|
|
return err
|
|
}
|
|
|
|
result.ResizeInt64(n, false)
|
|
vecCompareInt(mysql.HasUnsignedFlag(b.args[0].GetType().Flag), mysql.HasUnsignedFlag(b.args[1].GetType().Flag), buf0, buf1, result)
|
|
result.MergeNulls(buf0, buf1)
|
|
vecResOfLT(result.Int64s())
|
|
return nil
|
|
}
|
|
|
|
func vecResOfLT(res []int64) {
|
|
n := len(res)
|
|
for i := 0; i < n; i++ {
|
|
if res[i] < 0 {
|
|
res[i] = 1
|
|
} else {
|
|
res[i] = 0
|
|
}
|
|
}
|
|
}
|
|
|
|
func vecResOfNE(res []int64) {
|
|
n := len(res)
|
|
for i := 0; i < n; i++ {
|
|
if res[i] != 0 {
|
|
res[i] = 1
|
|
} else {
|
|
res[i] = 0
|
|
}
|
|
}
|
|
}
|
|
|
|
func vecResOfEQ(res []int64) {
|
|
n := len(res)
|
|
for i := 0; i < n; i++ {
|
|
if res[i] == 0 {
|
|
res[i] = 1
|
|
} else {
|
|
res[i] = 0
|
|
}
|
|
}
|
|
}
|
|
|
|
func vecResOfLE(res []int64) {
|
|
n := len(res)
|
|
for i := 0; i < n; i++ {
|
|
if res[i] <= 0 {
|
|
res[i] = 1
|
|
} else {
|
|
res[i] = 0
|
|
}
|
|
}
|
|
}
|
|
|
|
func vecResOfGT(res []int64) {
|
|
n := len(res)
|
|
for i := 0; i < n; i++ {
|
|
if res[i] > 0 {
|
|
res[i] = 1
|
|
} else {
|
|
res[i] = 0
|
|
}
|
|
}
|
|
}
|
|
|
|
func vecResOfGE(res []int64) {
|
|
n := len(res)
|
|
for i := 0; i < n; i++ {
|
|
if res[i] >= 0 {
|
|
res[i] = 1
|
|
} else {
|
|
res[i] = 0
|
|
}
|
|
}
|
|
}
|
|
|
|
// vecCompareInt is vectorized CompareInt()
|
|
func vecCompareInt(isUnsigned0, isUnsigned1 bool, largs, rargs, result *chunk.Column) {
|
|
switch {
|
|
case isUnsigned0 && isUnsigned1:
|
|
types.VecCompareUU(largs.Uint64s(), rargs.Uint64s(), result.Int64s())
|
|
case isUnsigned0 && !isUnsigned1:
|
|
types.VecCompareUI(largs.Uint64s(), rargs.Int64s(), result.Int64s())
|
|
case !isUnsigned0 && isUnsigned1:
|
|
types.VecCompareIU(largs.Int64s(), rargs.Uint64s(), result.Int64s())
|
|
case !isUnsigned0 && !isUnsigned1:
|
|
types.VecCompareII(largs.Int64s(), rargs.Int64s(), result.Int64s())
|
|
}
|
|
}
|
|
|
|
func (b *builtinGreatestTimeSig) vectorized() bool {
|
|
return true
|
|
}
|
|
|
|
func (b *builtinGreatestTimeSig) vecEvalString(input *chunk.Chunk, result *chunk.Column) error {
|
|
n := input.NumRows()
|
|
dst, err := b.bufAllocator.get(types.ETTimestamp, n)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer b.bufAllocator.put(dst)
|
|
|
|
sc := b.ctx.GetSessionVars().StmtCtx
|
|
dst.ResizeTime(n, false)
|
|
dstTimes := dst.Times()
|
|
for i := 0; i < n; i++ {
|
|
dstTimes[i] = types.ZeroDatetime
|
|
}
|
|
var argTime types.Time
|
|
for j := 0; j < len(b.args); j++ {
|
|
if err := b.args[j].VecEvalString(b.ctx, input, result); err != nil {
|
|
return err
|
|
}
|
|
for i := 0; i < n; i++ {
|
|
if result.IsNull(i) || dst.IsNull(i) {
|
|
dst.SetNull(i, true)
|
|
continue
|
|
}
|
|
argTime, err = types.ParseDatetime(sc, result.GetString(i))
|
|
if err != nil {
|
|
if err = handleInvalidTimeError(b.ctx, err); err != nil {
|
|
return err
|
|
}
|
|
continue
|
|
}
|
|
if argTime.Compare(dstTimes[i]) > 0 {
|
|
dstTimes[i] = argTime
|
|
}
|
|
}
|
|
}
|
|
result.ReserveString(n)
|
|
for i := 0; i < n; i++ {
|
|
if dst.IsNull(i) {
|
|
result.AppendNull()
|
|
} else {
|
|
result.AppendString(dstTimes[i].String())
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (b *builtinGreatestRealSig) vectorized() bool {
|
|
return true
|
|
}
|
|
|
|
func (b *builtinGreatestRealSig) vecEvalReal(input *chunk.Chunk, result *chunk.Column) error {
|
|
n := input.NumRows()
|
|
buf, err := b.bufAllocator.get(types.ETReal, n)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer b.bufAllocator.put(buf)
|
|
if err := b.args[0].VecEvalReal(b.ctx, input, result); err != nil {
|
|
return err
|
|
}
|
|
|
|
f64s := result.Float64s()
|
|
for j := 1; j < len(b.args); j++ {
|
|
if err := b.args[j].VecEvalReal(b.ctx, input, buf); err != nil {
|
|
return err
|
|
}
|
|
|
|
result.MergeNulls(buf)
|
|
v := buf.Float64s()
|
|
for i := 0; i < n; i++ {
|
|
if result.IsNull(i) {
|
|
continue
|
|
}
|
|
if v[i] > f64s[i] {
|
|
f64s[i] = v[i]
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (b *builtinLeastTimeSig) vectorized() bool {
|
|
return true
|
|
}
|
|
|
|
func (b *builtinLeastTimeSig) vecEvalString(input *chunk.Chunk, result *chunk.Column) error {
|
|
n := input.NumRows()
|
|
dst, err := b.bufAllocator.get(types.ETTimestamp, n)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer b.bufAllocator.put(dst)
|
|
|
|
sc := b.ctx.GetSessionVars().StmtCtx
|
|
dst.ResizeTime(n, false)
|
|
dstTimes := dst.Times()
|
|
for i := 0; i < n; i++ {
|
|
dstTimes[i] = types.NewTime(types.MaxDatetime, mysql.TypeDatetime, types.DefaultFsp)
|
|
}
|
|
var argTime types.Time
|
|
|
|
var findInvalidTime []bool = make([]bool, n)
|
|
var invalidValue []string = make([]string, n)
|
|
|
|
for j := 0; j < len(b.args); j++ {
|
|
if err := b.args[j].VecEvalString(b.ctx, input, result); err != nil {
|
|
return err
|
|
}
|
|
dst.MergeNulls(result)
|
|
for i := 0; i < n; i++ {
|
|
if dst.IsNull(i) {
|
|
continue
|
|
}
|
|
argTime, err = types.ParseDatetime(sc, result.GetString(i))
|
|
if err != nil {
|
|
if err = handleInvalidTimeError(b.ctx, err); err != nil {
|
|
return err
|
|
} else if !findInvalidTime[i] {
|
|
// Make a deep copy here.
|
|
// Otherwise invalidValue will internally change with result.
|
|
invalidValue[i] = string(result.GetBytes(i))
|
|
findInvalidTime[i] = true
|
|
}
|
|
continue
|
|
}
|
|
if argTime.Compare(dstTimes[i]) < 0 {
|
|
dstTimes[i] = argTime
|
|
}
|
|
}
|
|
}
|
|
result.ReserveString(n)
|
|
for i := 0; i < n; i++ {
|
|
if dst.IsNull(i) {
|
|
result.AppendNull()
|
|
continue
|
|
}
|
|
if findInvalidTime[i] {
|
|
result.AppendString(invalidValue[i])
|
|
} else {
|
|
result.AppendString(dstTimes[i].String())
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (b *builtinGreatestStringSig) vectorized() bool {
|
|
return true
|
|
}
|
|
|
|
func (b *builtinGreatestStringSig) vecEvalString(input *chunk.Chunk, result *chunk.Column) error {
|
|
if err := b.args[0].VecEvalString(b.ctx, input, result); err != nil {
|
|
return err
|
|
}
|
|
|
|
n := input.NumRows()
|
|
buf1, err := b.bufAllocator.get(types.ETString, n)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer b.bufAllocator.put(buf1)
|
|
buf2, err := b.bufAllocator.get(types.ETString, n)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer b.bufAllocator.put(buf2)
|
|
|
|
src := result
|
|
arg := buf1
|
|
dst := buf2
|
|
dst.ReserveString(n)
|
|
for j := 1; j < len(b.args); j++ {
|
|
if err := b.args[j].VecEvalString(b.ctx, input, arg); err != nil {
|
|
return err
|
|
}
|
|
for i := 0; i < n; i++ {
|
|
if src.IsNull(i) || arg.IsNull(i) {
|
|
dst.AppendNull()
|
|
continue
|
|
}
|
|
srcStr := src.GetString(i)
|
|
argStr := arg.GetString(i)
|
|
if types.CompareString(srcStr, argStr, b.collation) > 0 {
|
|
dst.AppendString(srcStr)
|
|
} else {
|
|
dst.AppendString(argStr)
|
|
}
|
|
}
|
|
src, dst = dst, src
|
|
arg.ReserveString(n)
|
|
dst.ReserveString(n)
|
|
}
|
|
if len(b.args)%2 == 0 {
|
|
src.CopyConstruct(result)
|
|
}
|
|
return nil
|
|
}
|
|
|