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logical_plan_test.go
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logical_plan_test.go
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// Copyright 2015 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package core
import (
"context"
"fmt"
"sort"
"strings"
"testing"
. "github.com/pingcap/check"
"github.com/pingcap/tidb/domain"
"github.com/pingcap/tidb/expression"
"github.com/pingcap/tidb/infoschema"
"github.com/pingcap/tidb/parser"
"github.com/pingcap/tidb/parser/ast"
"github.com/pingcap/tidb/parser/format"
"github.com/pingcap/tidb/parser/model"
"github.com/pingcap/tidb/parser/mysql"
"github.com/pingcap/tidb/parser/terror"
"github.com/pingcap/tidb/planner/property"
"github.com/pingcap/tidb/planner/util"
"github.com/pingcap/tidb/sessionctx"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/util/hint"
"github.com/pingcap/tidb/util/testleak"
"github.com/pingcap/tidb/util/testutil"
)
var _ = Suite(&testPlanSuite{})
func TestT(t *testing.T) {
CustomVerboseFlag = true
TestingT(t)
}
type testPlanSuite struct {
*parser.Parser
is infoschema.InfoSchema
ctx sessionctx.Context
testData testutil.TestData
optimizeVars map[string]string
}
func (s *testPlanSuite) SetUpSuite(c *C) {
s.is = infoschema.MockInfoSchema([]*model.TableInfo{MockSignedTable(), MockUnsignedTable(), MockView(), MockNoPKTable(),
MockRangePartitionTable(), MockHashPartitionTable(), MockListPartitionTable()})
s.ctx = MockContext()
domain.GetDomain(s.ctx).MockInfoCacheAndLoadInfoSchema(s.is)
s.ctx.GetSessionVars().EnableWindowFunction = true
s.Parser = parser.New()
s.Parser.SetParserConfig(parser.ParserConfig{EnableWindowFunction: true, EnableStrictDoubleTypeCheck: true})
var err error
s.testData, err = testutil.LoadTestSuiteData("testdata", "plan_suite_unexported")
c.Assert(err, IsNil)
}
func (s *testPlanSuite) TearDownSuite(c *C) {
c.Assert(s.testData.GenerateOutputIfNeeded(), IsNil)
}
func (s *testPlanSuite) TestPredicatePushDown(c *C) {
defer testleak.AfterTest(c)()
var input, output []string
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for ith, ca := range input {
comment := Commentf("for %s", ca)
stmt, err := s.ParseOneStmt(ca, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
p, err = logicalOptimize(context.TODO(), flagPredicatePushDown|flagDecorrelate|flagPrunColumns|flagPrunColumnsAgain, p.(LogicalPlan))
c.Assert(err, IsNil)
s.testData.OnRecord(func() {
output[ith] = ToString(p)
})
c.Assert(ToString(p), Equals, output[ith], Commentf("for %s %d", ca, ith))
}
}
func (s *testPlanSuite) TestEliminateProjectionUnderUnion(c *C) {
defer testleak.AfterTest(c)()
ctx := context.Background()
ca := "Select a from t3 join ( (select 127 as IDD from t3) union all (select 1 as IDD from t3) ) u on t3.b = u.IDD;"
comment := Commentf("for %s", ca)
stmt, err := s.ParseOneStmt(ca, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
p, err = logicalOptimize(context.TODO(), flagPredicatePushDown|flagJoinReOrder|flagPrunColumns|flagEliminateProjection, p.(LogicalPlan))
c.Assert(err, IsNil)
// after folding constants, the null flag should keep the same with the old one's (i.e., the schema's).
schemaNullFlag := p.(*LogicalProjection).children[0].(*LogicalJoin).children[1].Children()[1].(*LogicalProjection).schema.Columns[0].RetType.Flag & mysql.NotNullFlag
exprNullFlag := p.(*LogicalProjection).children[0].(*LogicalJoin).children[1].Children()[1].(*LogicalProjection).Exprs[0].GetType().Flag & mysql.NotNullFlag
c.Assert(schemaNullFlag, Equals, exprNullFlag)
}
func (s *testPlanSuite) TestJoinPredicatePushDown(c *C) {
defer testleak.AfterTest(c)()
var (
input []string
output []struct {
Left string
Right string
}
)
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for i, ca := range input {
comment := Commentf("for %s", ca)
stmt, err := s.ParseOneStmt(ca, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil, comment)
p, err = logicalOptimize(context.TODO(), flagPredicatePushDown|flagDecorrelate|flagPrunColumns|flagPrunColumnsAgain, p.(LogicalPlan))
c.Assert(err, IsNil, comment)
proj, ok := p.(*LogicalProjection)
c.Assert(ok, IsTrue, comment)
join, ok := proj.children[0].(*LogicalJoin)
c.Assert(ok, IsTrue, comment)
leftPlan, ok := join.children[0].(*DataSource)
c.Assert(ok, IsTrue, comment)
rightPlan, ok := join.children[1].(*DataSource)
c.Assert(ok, IsTrue, comment)
leftCond := fmt.Sprintf("%s", leftPlan.pushedDownConds)
rightCond := fmt.Sprintf("%s", rightPlan.pushedDownConds)
s.testData.OnRecord(func() {
output[i].Left, output[i].Right = leftCond, rightCond
})
c.Assert(leftCond, Equals, output[i].Left, comment)
c.Assert(rightCond, Equals, output[i].Right, comment)
}
}
func (s *testPlanSuite) TestOuterWherePredicatePushDown(c *C) {
defer testleak.AfterTest(c)()
var (
input []string
output []struct {
Sel string
Left string
Right string
}
)
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for i, ca := range input {
comment := Commentf("for %s", ca)
stmt, err := s.ParseOneStmt(ca, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil, comment)
p, err = logicalOptimize(context.TODO(), flagPredicatePushDown|flagDecorrelate|flagPrunColumns|flagPrunColumnsAgain, p.(LogicalPlan))
c.Assert(err, IsNil, comment)
proj, ok := p.(*LogicalProjection)
c.Assert(ok, IsTrue, comment)
selection, ok := proj.children[0].(*LogicalSelection)
c.Assert(ok, IsTrue, comment)
selCond := fmt.Sprintf("%s", selection.Conditions)
s.testData.OnRecord(func() {
output[i].Sel = selCond
})
c.Assert(selCond, Equals, output[i].Sel, comment)
join, ok := selection.children[0].(*LogicalJoin)
c.Assert(ok, IsTrue, comment)
leftPlan, ok := join.children[0].(*DataSource)
c.Assert(ok, IsTrue, comment)
rightPlan, ok := join.children[1].(*DataSource)
c.Assert(ok, IsTrue, comment)
leftCond := fmt.Sprintf("%s", leftPlan.pushedDownConds)
rightCond := fmt.Sprintf("%s", rightPlan.pushedDownConds)
s.testData.OnRecord(func() {
output[i].Left, output[i].Right = leftCond, rightCond
})
c.Assert(leftCond, Equals, output[i].Left, comment)
c.Assert(rightCond, Equals, output[i].Right, comment)
}
}
func (s *testPlanSuite) TestSimplifyOuterJoin(c *C) {
defer testleak.AfterTest(c)()
var (
input []string
output []struct {
Best string
JoinType string
}
)
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for i, ca := range input {
comment := Commentf("for %s", ca)
stmt, err := s.ParseOneStmt(ca, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil, comment)
p, err = logicalOptimize(context.TODO(), flagPredicatePushDown|flagPrunColumns|flagPrunColumnsAgain, p.(LogicalPlan))
c.Assert(err, IsNil, comment)
planString := ToString(p)
s.testData.OnRecord(func() {
output[i].Best = planString
})
c.Assert(planString, Equals, output[i].Best, comment)
join, ok := p.(LogicalPlan).Children()[0].(*LogicalJoin)
if !ok {
join, ok = p.(LogicalPlan).Children()[0].Children()[0].(*LogicalJoin)
c.Assert(ok, IsTrue, comment)
}
s.testData.OnRecord(func() {
output[i].JoinType = join.JoinType.String()
})
c.Assert(join.JoinType.String(), Equals, output[i].JoinType, comment)
}
}
func (s *testPlanSuite) TestAntiSemiJoinConstFalse(c *C) {
defer testleak.AfterTest(c)()
tests := []struct {
sql string
best string
joinType string
}{
{
sql: "select a from t t1 where not exists (select a from t t2 where t1.a = t2.a and t2.b = 1 and t2.b = 2)",
best: "Join{DataScan(t1)->DataScan(t2)}(test.t.a,test.t.a)->Projection",
joinType: "anti semi join",
},
}
ctx := context.Background()
for _, ca := range tests {
comment := Commentf("for %s", ca.sql)
stmt, err := s.ParseOneStmt(ca.sql, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil, comment)
p, err = logicalOptimize(context.TODO(), flagDecorrelate|flagPredicatePushDown|flagPrunColumns|flagPrunColumnsAgain, p.(LogicalPlan))
c.Assert(err, IsNil, comment)
c.Assert(ToString(p), Equals, ca.best, comment)
join, _ := p.(LogicalPlan).Children()[0].(*LogicalJoin)
c.Assert(join.JoinType.String(), Equals, ca.joinType, comment)
}
}
func (s *testPlanSuite) TestDeriveNotNullConds(c *C) {
defer testleak.AfterTest(c)()
var (
input []string
output []struct {
Plan string
Left string
Right string
}
)
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for i, ca := range input {
comment := Commentf("for %s", ca)
stmt, err := s.ParseOneStmt(ca, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil, comment)
p, err = logicalOptimize(context.TODO(), flagPredicatePushDown|flagPrunColumns|flagPrunColumnsAgain|flagDecorrelate, p.(LogicalPlan))
c.Assert(err, IsNil, comment)
s.testData.OnRecord(func() {
output[i].Plan = ToString(p)
})
c.Assert(ToString(p), Equals, output[i].Plan, comment)
join := p.(LogicalPlan).Children()[0].(*LogicalJoin)
left := join.Children()[0].(*DataSource)
right := join.Children()[1].(*DataSource)
leftConds := fmt.Sprintf("%s", left.pushedDownConds)
rightConds := fmt.Sprintf("%s", right.pushedDownConds)
s.testData.OnRecord(func() {
output[i].Left, output[i].Right = leftConds, rightConds
})
c.Assert(leftConds, Equals, output[i].Left, comment)
c.Assert(rightConds, Equals, output[i].Right, comment)
}
}
func (s *testPlanSuite) TestExtraPKNotNullFlag(c *C) {
defer testleak.AfterTest(c)()
sql := "select count(*) from t3"
ctx := context.Background()
comment := Commentf("for %s", sql)
stmt, err := s.ParseOneStmt(sql, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil, comment)
ds := p.(*LogicalProjection).children[0].(*LogicalAggregation).children[0].(*DataSource)
c.Assert(ds.Columns[2].Name.L, Equals, "_tidb_rowid")
c.Assert(ds.Columns[2].Flag, Equals, mysql.PriKeyFlag|mysql.NotNullFlag)
c.Assert(ds.schema.Columns[2].RetType.Flag, Equals, mysql.PriKeyFlag|mysql.NotNullFlag)
}
func buildLogicPlan4GroupBy(s *testPlanSuite, c *C, sql string) (Plan, error) {
sqlMode := s.ctx.GetSessionVars().SQLMode
mockedTableInfo := MockSignedTable()
// mock the table info here for later use
// enable only full group by
s.ctx.GetSessionVars().SQLMode = sqlMode | mysql.ModeOnlyFullGroupBy
defer func() { s.ctx.GetSessionVars().SQLMode = sqlMode }() // restore it
comment := Commentf("for %s", sql)
stmt, err := s.ParseOneStmt(sql, "", "")
c.Assert(err, IsNil, comment)
stmt.(*ast.SelectStmt).From.TableRefs.Left.(*ast.TableSource).Source.(*ast.TableName).TableInfo = mockedTableInfo
p, _, err := BuildLogicalPlanForTest(context.Background(), s.ctx, stmt, s.is)
return p, err
}
func (s *testPlanSuite) TestGroupByWhenNotExistCols(c *C) {
sqlTests := []struct {
sql string
expectedErrMatch string
}{
{
sql: "select a from t group by b",
expectedErrMatch: ".*contains nonaggregated column 'test\\.t\\.a'.*",
},
{
// has an as column alias
sql: "select a as tempField from t group by b",
expectedErrMatch: ".*contains nonaggregated column 'test\\.t\\.a'.*",
},
{
// has as table alias
sql: "select tempTable.a from t as tempTable group by b",
expectedErrMatch: ".*contains nonaggregated column 'test\\.tempTable\\.a'.*",
},
{
// has a func call
sql: "select length(a) from t group by b",
expectedErrMatch: ".*contains nonaggregated column 'test\\.t\\.a'.*",
},
{
// has a func call with two cols
sql: "select length(b + a) from t group by b",
expectedErrMatch: ".*contains nonaggregated column 'test\\.t\\.a'.*",
},
{
// has a func call with two cols
sql: "select length(a + b) from t group by b",
expectedErrMatch: ".*contains nonaggregated column 'test\\.t\\.a'.*",
},
{
// has a func call with two cols
sql: "select length(a + b) as tempField from t group by b",
expectedErrMatch: ".*contains nonaggregated column 'test\\.t\\.a'.*",
},
}
for _, test := range sqlTests {
sql := test.sql
p, err := buildLogicPlan4GroupBy(s, c, sql)
c.Assert(err, NotNil)
c.Assert(p, IsNil)
c.Assert(err, ErrorMatches, test.expectedErrMatch)
}
}
func (s *testPlanSuite) TestDupRandJoinCondsPushDown(c *C) {
sql := "select * from t as t1 join t t2 on t1.a > rand() and t1.a > rand()"
comment := Commentf("for %s", sql)
stmt, err := s.ParseOneStmt(sql, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(context.Background(), s.ctx, stmt, s.is)
c.Assert(err, IsNil, comment)
p, err = logicalOptimize(context.TODO(), flagPredicatePushDown, p.(LogicalPlan))
c.Assert(err, IsNil, comment)
proj, ok := p.(*LogicalProjection)
c.Assert(ok, IsTrue, comment)
join, ok := proj.children[0].(*LogicalJoin)
c.Assert(ok, IsTrue, comment)
leftPlan, ok := join.children[0].(*LogicalSelection)
c.Assert(ok, IsTrue, comment)
leftCond := fmt.Sprintf("%s", leftPlan.Conditions)
// Condition with mutable function cannot be de-duplicated when push down join conds.
c.Assert(leftCond, Equals, "[gt(cast(test.t.a, double BINARY), rand()) gt(cast(test.t.a, double BINARY), rand())]", comment)
}
func (s *testPlanSuite) TestTablePartition(c *C) {
defer testleak.AfterTest(c)()
definitions := []model.PartitionDefinition{
{
ID: 41,
Name: model.NewCIStr("p1"),
LessThan: []string{"16"},
},
{
ID: 42,
Name: model.NewCIStr("p2"),
LessThan: []string{"32"},
},
{
ID: 43,
Name: model.NewCIStr("p3"),
LessThan: []string{"64"},
},
{
ID: 44,
Name: model.NewCIStr("p4"),
LessThan: []string{"128"},
},
{
ID: 45,
Name: model.NewCIStr("p5"),
LessThan: []string{"maxvalue"},
},
}
is := MockPartitionInfoSchema(definitions)
// is1 equals to is without maxvalue partition.
definitions1 := make([]model.PartitionDefinition, len(definitions)-1)
copy(definitions1, definitions)
is1 := MockPartitionInfoSchema(definitions1)
isChoices := []infoschema.InfoSchema{is, is1}
var (
input []struct {
SQL string
IsIdx int
}
output []string
)
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for i, ca := range input {
comment := Commentf("for %s", ca.SQL)
stmt, err := s.ParseOneStmt(ca.SQL, "", "")
c.Assert(err, IsNil, comment)
s.testData.OnRecord(func() {
})
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, isChoices[ca.IsIdx])
c.Assert(err, IsNil)
p, err = logicalOptimize(context.TODO(), flagDecorrelate|flagPrunColumns|flagPrunColumnsAgain|flagPredicatePushDown|flagPartitionProcessor, p.(LogicalPlan))
c.Assert(err, IsNil)
planString := ToString(p)
s.testData.OnRecord(func() {
output[i] = planString
})
c.Assert(ToString(p), Equals, output[i], Commentf("for %s", ca))
}
}
func (s *testPlanSuite) TestSubquery(c *C) {
defer testleak.AfterTest(c)()
var input, output []string
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for ith, ca := range input {
comment := Commentf("for %s", ca)
stmt, err := s.ParseOneStmt(ca, "", "")
c.Assert(err, IsNil, comment)
err = Preprocess(s.ctx, stmt, WithPreprocessorReturn(&PreprocessorReturn{InfoSchema: s.is}))
c.Assert(err, IsNil)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
if lp, ok := p.(LogicalPlan); ok {
p, err = logicalOptimize(context.TODO(), flagBuildKeyInfo|flagDecorrelate|flagPrunColumns|flagPrunColumnsAgain, lp)
c.Assert(err, IsNil)
}
s.testData.OnRecord(func() {
output[ith] = ToString(p)
})
c.Assert(ToString(p), Equals, output[ith], Commentf("for %s %d", ca, ith))
}
}
func (s *testPlanSuite) TestPlanBuilder(c *C) {
defer testleak.AfterTest(c)()
var input, output []string
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for i, ca := range input {
comment := Commentf("for %s", ca)
stmt, err := s.ParseOneStmt(ca, "", "")
c.Assert(err, IsNil, comment)
s.ctx.GetSessionVars().SetHashJoinConcurrency(1)
err = Preprocess(s.ctx, stmt, WithPreprocessorReturn(&PreprocessorReturn{InfoSchema: s.is}))
c.Assert(err, IsNil)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
if lp, ok := p.(LogicalPlan); ok {
p, err = logicalOptimize(context.TODO(), flagPrunColumns|flagPrunColumnsAgain, lp)
c.Assert(err, IsNil)
}
s.testData.OnRecord(func() {
output[i] = ToString(p)
})
c.Assert(ToString(p), Equals, output[i], Commentf("for %s", ca))
}
}
func (s *testPlanSuite) TestJoinReOrder(c *C) {
defer testleak.AfterTest(c)()
var input, output []string
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for i, tt := range input {
comment := Commentf("for %s", tt)
stmt, err := s.ParseOneStmt(tt, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
p, err = logicalOptimize(context.TODO(), flagPredicatePushDown|flagJoinReOrder, p.(LogicalPlan))
c.Assert(err, IsNil)
planString := ToString(p)
s.testData.OnRecord(func() {
output[i] = planString
})
c.Assert(planString, Equals, output[i], Commentf("for %s", tt))
}
}
func (s *testPlanSuite) TestEagerAggregation(c *C) {
defer testleak.AfterTest(c)()
var input []string
var output []string
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
s.ctx.GetSessionVars().AllowAggPushDown = true
for ith, tt := range input {
comment := Commentf("for %s", tt)
stmt, err := s.ParseOneStmt(tt, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
p, err = logicalOptimize(context.TODO(), flagBuildKeyInfo|flagPredicatePushDown|flagPrunColumns|flagPrunColumnsAgain|flagPushDownAgg, p.(LogicalPlan))
c.Assert(err, IsNil)
s.testData.OnRecord(func() {
output[ith] = ToString(p)
})
c.Assert(ToString(p), Equals, output[ith], Commentf("for %s %d", tt, ith))
}
s.ctx.GetSessionVars().AllowAggPushDown = false
}
func (s *testPlanSuite) TestColumnPruning(c *C) {
defer testleak.AfterTest(c)()
var (
input []string
output []map[int][]string
)
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for i, tt := range input {
comment := Commentf("case:%v sql:\"%s\"", i, tt)
stmt, err := s.ParseOneStmt(tt, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
lp, err := logicalOptimize(ctx, flagPredicatePushDown|flagPrunColumns|flagPrunColumnsAgain, p.(LogicalPlan))
c.Assert(err, IsNil)
s.testData.OnRecord(func() {
output[i] = make(map[int][]string)
})
s.checkDataSourceCols(lp, c, output[i], comment)
}
}
func (s *testPlanSuite) TestSortByItemsPruning(c *C) {
defer testleak.AfterTest(c)()
var (
input []string
output [][]string
)
s.testData.GetTestCases(c, &input, &output)
s.testData.OnRecord(func() {
output = make([][]string, len(input))
})
ctx := context.Background()
for i, tt := range input {
comment := Commentf("for %s", tt)
stmt, err := s.ParseOneStmt(tt, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
lp, err := logicalOptimize(ctx, flagEliminateProjection|flagPredicatePushDown|flagPrunColumns|flagPrunColumnsAgain, p.(LogicalPlan))
c.Assert(err, IsNil)
s.checkOrderByItems(lp, c, &output[i], comment)
}
}
func (s *testPlanSuite) TestProjectionEliminator(c *C) {
defer testleak.AfterTest(c)()
tests := []struct {
sql string
best string
}{
{
sql: "select 1+num from (select 1+a as num from t) t1;",
best: "DataScan(t)->Projection",
}, {
sql: "select count(*) from t where a in (select b from t2 where a is null);",
best: "Join{DataScan(t)->Dual->Aggr(firstrow(test.t2.b))}(test.t.a,test.t2.b)->Aggr(count(1))->Projection",
},
}
ctx := context.Background()
for ith, tt := range tests {
comment := Commentf("for %s", tt.sql)
stmt, err := s.ParseOneStmt(tt.sql, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
p, err = logicalOptimize(context.TODO(), flagBuildKeyInfo|flagPrunColumns|flagPrunColumnsAgain|flagEliminateProjection, p.(LogicalPlan))
c.Assert(err, IsNil)
c.Assert(ToString(p), Equals, tt.best, Commentf("for %s %d", tt.sql, ith))
}
}
func (s *testPlanSuite) TestCS3389(c *C) {
defer testleak.AfterTest(c)()
ctx := context.Background()
stmt, err := s.ParseOneStmt("select count(*) from t where a in (select b from t2 where a is null);", "", "")
c.Assert(err, IsNil)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
p, err = logicalOptimize(context.TODO(), flagBuildKeyInfo|flagPrunColumns|flagPrunColumnsAgain|flagEliminateProjection|flagJoinReOrder, p.(LogicalPlan))
c.Assert(err, IsNil)
// Assert that all Projection is not empty and there is no Projection between Aggregation and Join.
proj, isProj := p.(*LogicalProjection)
c.Assert(isProj, IsTrue)
c.Assert(len(proj.Exprs) > 0, IsTrue)
child := proj.Children()[0]
agg, isAgg := child.(*LogicalAggregation)
c.Assert(isAgg, IsTrue)
child = agg.Children()[0]
_, isJoin := child.(*LogicalJoin)
c.Assert(isJoin, IsTrue)
}
func (s *testPlanSuite) TestAllocID(c *C) {
ctx := MockContext()
pA := DataSource{}.Init(ctx, 0)
pB := DataSource{}.Init(ctx, 0)
c.Assert(pA.id+1, Equals, pB.id)
}
func (s *testPlanSuite) checkDataSourceCols(p LogicalPlan, c *C, ans map[int][]string, comment CommentInterface) {
switch v := p.(type) {
case *DataSource, *LogicalUnionAll, *LogicalLimit:
s.testData.OnRecord(func() {
ans[p.ID()] = make([]string, p.Schema().Len())
})
colList, ok := ans[p.ID()]
c.Assert(ok, IsTrue, Commentf("For %s %T ID %d Not found", comment.CheckCommentString(), v, p.ID()))
c.Assert(len(p.Schema().Columns), Equals, len(colList), comment)
for i, col := range p.Schema().Columns {
s.testData.OnRecord(func() {
colList[i] = col.String()
})
c.Assert(col.String(), Equals, colList[i], comment)
}
}
for _, child := range p.Children() {
s.checkDataSourceCols(child, c, ans, comment)
}
}
func (s *testPlanSuite) checkOrderByItems(p LogicalPlan, c *C, colList *[]string, comment CommentInterface) {
switch p := p.(type) {
case *LogicalSort:
s.testData.OnRecord(func() {
*colList = make([]string, len(p.ByItems))
})
for i, col := range p.ByItems {
s.testData.OnRecord(func() {
(*colList)[i] = col.String()
})
s := col.String()
c.Assert(s, Equals, (*colList)[i], comment)
}
}
children := p.Children()
c.Assert(len(children), LessEqual, 1, Commentf("For %v Expected <= 1 Child", comment))
for _, child := range children {
s.checkOrderByItems(child, c, colList, comment)
}
}
func (s *testPlanSuite) TestValidate(c *C) {
defer testleak.AfterTest(c)()
tests := []struct {
sql string
err *terror.Error
}{
{
sql: "select date_format((1,2), '%H');",
err: expression.ErrOperandColumns,
},
{
sql: "select cast((1,2) as date)",
err: expression.ErrOperandColumns,
},
{
sql: "select (1,2) between (3,4) and (5,6)",
err: expression.ErrOperandColumns,
},
{
sql: "select (1,2) rlike '1'",
err: expression.ErrOperandColumns,
},
{
sql: "select (1,2) like '1'",
err: expression.ErrOperandColumns,
},
{
sql: "select case(1,2) when(1,2) then true end",
err: expression.ErrOperandColumns,
},
{
sql: "select (1,2) in ((3,4),(5,6))",
err: nil,
},
{
sql: "select row(1,(2,3)) in (select a,b from t)",
err: expression.ErrOperandColumns,
},
{
sql: "select row(1,2) in (select a,b from t)",
err: nil,
},
{
sql: "select (1,2) in ((3,4),5)",
err: expression.ErrOperandColumns,
},
{
sql: "select (1,2) is true",
err: expression.ErrOperandColumns,
},
{
sql: "select (1,2) is null",
err: expression.ErrOperandColumns,
},
{
sql: "select (+(1,2))=(1,2)",
err: nil,
},
{
sql: "select (-(1,2))=(1,2)",
err: expression.ErrOperandColumns,
},
{
sql: "select (1,2)||(1,2)",
err: expression.ErrOperandColumns,
},
{
sql: "select (1,2) < (3,4)",
err: nil,
},
{
sql: "select (1,2) < 3",
err: expression.ErrOperandColumns,
},
{
sql: "select 1, * from t",
err: ErrInvalidWildCard,
},
{
sql: "select *, 1 from t",
err: nil,
},
{
sql: "select 1, t.* from t",
err: nil,
},
{
sql: "select 1 from t t1, t t2 where t1.a > all((select a) union (select a))",
err: ErrAmbiguous,
},
{
sql: "insert into t set a = 1, b = a + 1",
err: nil,
},
{
sql: "insert into t set a = 1, b = values(a) + 1",
err: nil,
},
{
sql: "select a, b, c from t order by 0",
err: ErrUnknownColumn,
},
{
sql: "select a, b, c from t order by 4",
err: ErrUnknownColumn,
},
{
sql: "select a as c1, b as c1 from t order by c1",
err: ErrAmbiguous,
},
{
sql: "(select a as b, b from t) union (select a, b from t) order by b",
err: ErrAmbiguous,
},
{
sql: "(select a as b, b from t) union (select a, b from t) order by a",
err: ErrUnknownColumn,
},
{
sql: "select * from t t1 use index(e)",
err: ErrKeyDoesNotExist,
},
{
sql: "select a from t having c2",
err: ErrUnknownColumn,
},
{
sql: "select a from t group by c2 + 1 having c2",
err: ErrUnknownColumn,
},
{
sql: "select a as b, b from t having b",
err: ErrAmbiguous,
},
{
sql: "select a + 1 from t having a",
err: ErrUnknownColumn,
},
{ // issue (#20509)
sql: "select * from t left join t2 on t.a=t2.a having not (t.a <=> t2.a)",
err: nil,
},
{
sql: "select a from t having sum(avg(a))",
err: ErrInvalidGroupFuncUse,
},
{
sql: "select concat(c_str, d_str) from t group by `concat(c_str, d_str)`",
err: nil,
},
{
sql: "select concat(c_str, d_str) from t group by `concat(c_str,d_str)`",
err: ErrUnknownColumn,
},
{
sql: "select a from t b having b.a",
err: nil,
},
{
sql: "select b.a from t b having b.a",
err: nil,
},
{
sql: "select b.a from t b having a",
err: nil,
},
{
sql: "select a+1 from t having t.a",
err: ErrUnknownColumn,
},
}
ctx := context.Background()
for _, tt := range tests {
sql := tt.sql
comment := Commentf("for %s", sql)
stmt, err := s.ParseOneStmt(sql, "", "")
c.Assert(err, IsNil, comment)
err = Preprocess(s.ctx, stmt, WithPreprocessorReturn(&PreprocessorReturn{InfoSchema: s.is}))
c.Assert(err, IsNil)
_, _, err = BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
if tt.err == nil {
c.Assert(err, IsNil, comment)
} else {
c.Assert(tt.err.Equal(err), IsTrue, comment)
}
}
}
func (s *testPlanSuite) checkUniqueKeys(p LogicalPlan, c *C, ans map[int][][]string, sql string) {
s.testData.OnRecord(func() {
ans[p.ID()] = make([][]string, len(p.Schema().Keys))
})
keyList, ok := ans[p.ID()]
c.Assert(ok, IsTrue, Commentf("for %s, %v not found", sql, p.ID()))
c.Assert(len(p.Schema().Keys), Equals, len(keyList), Commentf("for %s, %v, the number of key doesn't match, the schema is %s", sql, p.ID(), p.Schema()))
for i := range keyList {
s.testData.OnRecord(func() {
keyList[i] = make([]string, len(p.Schema().Keys[i]))
})
c.Assert(len(p.Schema().Keys[i]), Equals, len(keyList[i]), Commentf("for %s, %v %v, the number of column doesn't match", sql, p.ID(), keyList[i]))
for j := range keyList[i] {
s.testData.OnRecord(func() {
keyList[i][j] = p.Schema().Keys[i][j].String()
})
c.Assert(p.Schema().Keys[i][j].String(), Equals, keyList[i][j], Commentf("for %s, %v %v, column dosen't match", sql, p.ID(), keyList[i]))
}
}
s.testData.OnRecord(func() {
ans[p.ID()] = keyList
})
for _, child := range p.Children() {
s.checkUniqueKeys(child, c, ans, sql)
}
}
func (s *testPlanSuite) TestUniqueKeyInfo(c *C) {
defer testleak.AfterTest(c)()
var input []string
var output []map[int][][]string
s.testData.GetTestCases(c, &input, &output)
s.testData.OnRecord(func() {
output = make([]map[int][][]string, len(input))
})
ctx := context.Background()
for ith, tt := range input {
comment := Commentf("for %s %d", tt, ith)
stmt, err := s.ParseOneStmt(tt, "", "")
c.Assert(err, IsNil, comment)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
lp, err := logicalOptimize(context.TODO(), flagPredicatePushDown|flagPrunColumns|flagBuildKeyInfo, p.(LogicalPlan))
c.Assert(err, IsNil)
s.testData.OnRecord(func() {
output[ith] = make(map[int][][]string)
})
s.checkUniqueKeys(lp, c, output[ith], tt)
}
}
func (s *testPlanSuite) TestAggPrune(c *C) {
defer testleak.AfterTest(c)()
var input, output []string
s.testData.GetTestCases(c, &input, &output)
ctx := context.Background()
for i, tt := range input {
comment := Commentf("for %s", tt)
stmt, err := s.ParseOneStmt(tt, "", "")
c.Assert(err, IsNil, comment)
domain.GetDomain(s.ctx).MockInfoCacheAndLoadInfoSchema(s.is)
p, _, err := BuildLogicalPlanForTest(ctx, s.ctx, stmt, s.is)
c.Assert(err, IsNil)
p, err = logicalOptimize(context.TODO(), flagPredicatePushDown|flagPrunColumns|flagPrunColumnsAgain|flagBuildKeyInfo|flagEliminateAgg|flagEliminateProjection, p.(LogicalPlan))
c.Assert(err, IsNil)
planString := ToString(p)
s.testData.OnRecord(func() {
output[i] = planString
})
c.Assert(planString, Equals, output[i], comment)
}
}
func (s *testPlanSuite) TestVisitInfo(c *C) {
defer testleak.AfterTest(c)()
tests := []struct {
sql string
ans []visitInfo
}{
{
sql: "insert into t (a) values (1)",
ans: []visitInfo{
{mysql.InsertPriv, "test", "t", "", nil, false, "", false},
},
},
{
sql: "delete from t where a = 1",
ans: []visitInfo{