138 lines
3.1 KiB
Go
138 lines
3.1 KiB
Go
// 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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"math"
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"strings"
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"unicode/utf8"
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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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func (b *builtinLowerSig) 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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if types.IsBinaryStr(b.args[0].GetType()) {
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return nil
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}
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Loop:
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for i := 0; i < input.NumRows(); i++ {
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str := result.GetBytes(i)
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for _, c := range str {
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if c >= utf8.RuneSelf {
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continue Loop
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}
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}
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for i := range str {
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if str[i] >= 'A' && str[i] <= 'Z' {
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str[i] += 'a' - 'A'
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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 *builtinLowerSig) vectorized() bool {
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return true
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}
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func (b *builtinRepeatSig) vecEvalString(input *chunk.Chunk, result *chunk.Column) error {
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n := input.NumRows()
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buf, 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(buf)
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if err := b.args[0].VecEvalString(b.ctx, input, buf); err != nil {
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return err
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}
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buf2, 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(buf2)
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if err := b.args[1].VecEvalInt(b.ctx, input, buf2); err != nil {
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return err
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}
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result.ReserveString(n)
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nums := buf2.Int64s()
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for i := 0; i < n; i++ {
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// TODO: introduce vectorized null-bitmap to speed it up.
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if buf.IsNull(i) || buf2.IsNull(i) {
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result.AppendNull()
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continue
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}
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num := nums[i]
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if num < 1 {
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result.AppendString("")
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continue
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}
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if num > math.MaxInt32 {
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// to avoid overflow when calculating uint64(byteLength)*uint64(num) later
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num = math.MaxInt32
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}
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str := buf.GetString(i)
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byteLength := len(str)
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if uint64(byteLength)*uint64(num) > b.maxAllowedPacket {
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b.ctx.GetSessionVars().StmtCtx.AppendWarning(errWarnAllowedPacketOverflowed.GenWithStackByArgs("repeat", b.maxAllowedPacket))
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result.AppendNull()
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continue
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}
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if int64(byteLength) > int64(b.tp.Flen)/num {
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result.AppendNull()
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continue
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}
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result.AppendString(strings.Repeat(str, int(num)))
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}
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return nil
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}
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func (b *builtinRepeatSig) vectorized() bool {
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return true
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}
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func (b *builtinStringIsNullSig) 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.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(buf)
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if err := b.args[0].VecEvalString(b.ctx, input, buf); err != nil {
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return err
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}
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result.ResizeInt64(n, false)
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i64s := result.Int64s()
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for i := 0; i < n; i++ {
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if buf.IsNull(i) {
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i64s[i] = 1
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} else {
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i64s[i] = 0
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}
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}
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return nil
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}
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func (b *builtinStringIsNullSig) vectorized() bool {
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return true
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}
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