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// Copyright 2019 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 expression
import (
"testing"
. "github.com/pingcap/check"
"github.com/pingcap/parser/ast"
"github.com/pingcap/parser/mysql"
"github.com/pingcap/tidb/types"
"github.com/pingcap/tidb/util/chunk"
"github.com/pingcap/tidb/util/mock"
)
func genVecBuiltinRegexpBenchCaseForConstants() (baseFunc builtinFunc, childrenFieldTypes []*types.FieldType, input *chunk.Chunk, output *chunk.Column) {
const (
numArgs = 2
batchSz = 1024
rePat = `\A[A-Za-z]{3,5}\d{1,5}[[:alpha:]]*\z`
)
childrenFieldTypes = make([]*types.FieldType, numArgs)
for i := 0; i < numArgs; i++ {
childrenFieldTypes[i] = eType2FieldType(types.ETString)
}
input = chunk.New(childrenFieldTypes, batchSz, batchSz)
// Fill the first arg with some random string
fillColumnWithGener(types.ETString, input, 0, newRandLenStrGener(10, 20))
// It seems like we still need to fill this column, otherwise row.GetDatumRow() will crash
fillColumnWithGener(types.ETString, input, 1, &constStrGener{s: rePat})
args := make([]Expression, numArgs)
args[0] = &Column{Index: 0, RetType: childrenFieldTypes[0]}
args[1] = DatumToConstant(types.NewStringDatum(rePat), mysql.TypeString)
var err error
baseFunc, err = funcs[ast.Regexp].getFunction(mock.NewContext(), args)
if err != nil {
panic(err)
}
output = chunk.NewColumn(eType2FieldType(types.ETInt), batchSz)
// Mess up the output to make sure vecEvalXXX to call ResizeXXX/ReserveXXX itself.
output.AppendNull()
return
}
func (s *testEvaluatorSuite) TestVectorizedBuiltinRegexpForConstants(c *C) {
bf, childrenFieldTypes, input, output := genVecBuiltinRegexpBenchCaseForConstants()
err := bf.vecEvalInt(input, output)
c.Assert(err, IsNil)
i64s := output.Int64s()
it := chunk.NewIterator4Chunk(input)
i := 0
commentf := func(row int) CommentInterface {
return Commentf("func: builtinRegexpUTF8Sig, row: %v, rowData: %v", row, input.GetRow(row).GetDatumRow(childrenFieldTypes))
}
for row := it.Begin(); row != it.End(); row = it.Next() {
val, isNull, err := bf.evalInt(row)
c.Assert(err, IsNil)
c.Assert(isNull, Equals, output.IsNull(i), commentf(i))
if !isNull {
c.Assert(val, Equals, i64s[i], commentf(i))
}
i++
}
}
func BenchmarkVectorizedBuiltinRegexpForConstants(b *testing.B) {
bf, _, input, output := genVecBuiltinRegexpBenchCaseForConstants()
b.Run("builtinRegexpUTF8Sig-Constants-VecBuiltinFunc", func(b *testing.B) {
b.ResetTimer()
for i := 0; i < b.N; i++ {
if err := bf.vecEvalInt(input, output); err != nil {
b.Fatal(err)
}
}
})
b.Run("builtinRegexpUTF8Sig-Constants-NonVecBuiltinFunc", func(b *testing.B) {
b.ResetTimer()
it := chunk.NewIterator4Chunk(input)
for i := 0; i < b.N; i++ {
output.Reset(types.ETInt)
for row := it.Begin(); row != it.End(); row = it.Next() {
v, isNull, err := bf.evalInt(row)
if err != nil {
b.Fatal(err)
}
if isNull {
output.AppendNull()
} else {
output.AppendInt64(v)
}
}
}
})
}