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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 executor
import (
"fmt"
"hash"
"hash/fnv"
. "github.com/pingcap/check"
"github.com/pingcap/parser/mysql"
"github.com/pingcap/tidb/types"
"github.com/pingcap/tidb/types/json"
"github.com/pingcap/tidb/util/chunk"
"github.com/pingcap/tidb/util/memory"
"github.com/pingcap/tidb/util/mock"
)
func (s *pkgTestSuite) TestRowHashMap(c *C) {
m := newRowHashMap(0)
m.Put(1, chunk.RowPtr{ChkIdx: 1, RowIdx: 1})
c.Check(m.Get(1), DeepEquals, []chunk.RowPtr{{ChkIdx: 1, RowIdx: 1}})
rawData := map[uint64][]chunk.RowPtr{}
for i := uint64(0); i < 10; i++ {
for j := uint64(0); j < initialEntrySliceLen*i; j++ {
rawData[i] = append(rawData[i], chunk.RowPtr{ChkIdx: uint32(i), RowIdx: uint32(j)})
}
}
m = newRowHashMap(0)
// put all rawData into m vertically
for j := uint64(0); j < initialEntrySliceLen*9; j++ {
for i := 9; i >= 0; i-- {
i := uint64(i)
if !(j < initialEntrySliceLen*i) {
break
}
m.Put(i, rawData[i][j])
}
}
// check
totalCount := 0
for i := uint64(0); i < 10; i++ {
totalCount += len(rawData[i])
c.Check(m.Get(i), DeepEquals, rawData[i])
}
c.Check(m.Len(), Equals, totalCount)
}
func initBuildChunk(numRows int) (*chunk.Chunk, []*types.FieldType) {
numCols := 6
colTypes := make([]*types.FieldType, 0, numCols)
colTypes = append(colTypes, &types.FieldType{Tp: mysql.TypeLonglong})
colTypes = append(colTypes, &types.FieldType{Tp: mysql.TypeLonglong})
colTypes = append(colTypes, &types.FieldType{Tp: mysql.TypeVarchar})
colTypes = append(colTypes, &types.FieldType{Tp: mysql.TypeVarchar})
colTypes = append(colTypes, &types.FieldType{Tp: mysql.TypeNewDecimal})
colTypes = append(colTypes, &types.FieldType{Tp: mysql.TypeJSON})
oldChk := chunk.NewChunkWithCapacity(colTypes, numRows)
for i := 0; i < numRows; i++ {
str := fmt.Sprintf("%d.12345", i)
oldChk.AppendNull(0)
oldChk.AppendInt64(1, int64(i))
oldChk.AppendString(2, str)
oldChk.AppendString(3, str)
oldChk.AppendMyDecimal(4, types.NewDecFromStringForTest(str))
oldChk.AppendJSON(5, json.CreateBinary(str))
}
return oldChk, colTypes
}
func initProbeChunk(numRows int) (*chunk.Chunk, []*types.FieldType) {
numCols := 3
colTypes := make([]*types.FieldType, 0, numCols)
colTypes = append(colTypes, &types.FieldType{Tp: mysql.TypeLonglong})
colTypes = append(colTypes, &types.FieldType{Tp: mysql.TypeLonglong})
colTypes = append(colTypes, &types.FieldType{Tp: mysql.TypeVarchar})
oldChk := chunk.NewChunkWithCapacity(colTypes, numRows)
for i := 0; i < numRows; i++ {
str := fmt.Sprintf("%d.12345", i)
oldChk.AppendNull(0)
oldChk.AppendInt64(1, int64(i))
oldChk.AppendString(2, str)
}
return oldChk, colTypes
}
type hashCollision struct {
count int
}
func (h *hashCollision) Sum64() uint64 {
h.count++
return 0
}
func (h hashCollision) Write(p []byte) (n int, err error) { return len(p), nil }
func (h hashCollision) Reset() {}
func (h hashCollision) Sum(b []byte) []byte { panic("not implemented") }
func (h hashCollision) Size() int { panic("not implemented") }
func (h hashCollision) BlockSize() int { panic("not implemented") }
func (s *pkgTestSerialSuite) TestHashRowContainer(c *C) {
hashFunc := func() hash.Hash64 {
return fnv.New64()
}
rowContainer := s.testHashRowContainer(c, hashFunc, false)
c.Assert(rowContainer.stat.probeCollision, Equals, 0)
// On windows time.Now() is imprecise, the elapse time may equal 0
c.Assert(rowContainer.stat.buildTableElapse >= 0, IsTrue)
rowContainer = s.testHashRowContainer(c, hashFunc, true)
c.Assert(rowContainer.stat.probeCollision, Equals, 0)
c.Assert(rowContainer.stat.buildTableElapse >= 0, IsTrue)
h := &hashCollision{count: 0}
hashFuncCollision := func() hash.Hash64 {
return h
}
rowContainer = s.testHashRowContainer(c, hashFuncCollision, false)
c.Assert(h.count > 0, IsTrue)
c.Assert(rowContainer.stat.probeCollision > 0, IsTrue)
c.Assert(rowContainer.stat.buildTableElapse >= 0, IsTrue)
}
func (s *pkgTestSerialSuite) testHashRowContainer(c *C, hashFunc func() hash.Hash64, spill bool) *hashRowContainer {
sctx := mock.NewContext()
var err error
numRows := 10
chk0, colTypes := initBuildChunk(numRows)
chk1, _ := initBuildChunk(numRows)
hCtx := &hashContext{
allTypes: colTypes,
keyColIdx: []int{1, 2},
}
hCtx.hasNull = make([]bool, numRows)
for i := 0; i < numRows; i++ {
hCtx.hashVals = append(hCtx.hashVals, hashFunc())
}
rowContainer := newHashRowContainer(sctx, 0, hCtx)
tracker := rowContainer.GetMemTracker()
tracker.SetLabel(memory.LabelForBuildSideResult)
if spill {
tracker.SetBytesLimit(1)
rowContainer.rowContainer.ActionSpillForTest().Action(tracker)
}
err = rowContainer.PutChunk(chk0)
c.Assert(err, IsNil)
err = rowContainer.PutChunk(chk1)
c.Assert(err, IsNil)
rowContainer.ActionSpill().(*chunk.SpillDiskAction).WaitForTest()
c.Assert(rowContainer.alreadySpilledSafeForTest(), Equals, spill)
c.Assert(rowContainer.GetMemTracker().BytesConsumed() == 0, Equals, spill)
c.Assert(rowContainer.GetMemTracker().BytesConsumed() > 0, Equals, !spill)
if rowContainer.alreadySpilledSafeForTest() {
c.Assert(rowContainer.GetDiskTracker(), NotNil)
c.Assert(rowContainer.GetDiskTracker().BytesConsumed() > 0, Equals, true)
}
probeChk, probeColType := initProbeChunk(2)
probeRow := probeChk.GetRow(1)
probeCtx := &hashContext{
allTypes: probeColType,
keyColIdx: []int{1, 2},
}
probeCtx.hasNull = make([]bool, 1)
probeCtx.hashVals = append(hCtx.hashVals, hashFunc())
matched, _, err := rowContainer.GetMatchedRowsAndPtrs(hCtx.hashVals[1].Sum64(), probeRow, probeCtx)
c.Assert(err, IsNil)
c.Assert(len(matched), Equals, 2)
c.Assert(matched[0].GetDatumRow(colTypes), DeepEquals, chk0.GetRow(1).GetDatumRow(colTypes))
c.Assert(matched[1].GetDatumRow(colTypes), DeepEquals, chk1.GetRow(1).GetDatumRow(colTypes))
return rowContainer
}