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physical_plan_test.go
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physical_plan_test.go
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// Copyright 2017 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_test
import (
"context"
"fmt"
"math"
"strings"
"testing"
"github.com/pingcap/tidb/domain"
"github.com/pingcap/tidb/executor"
"github.com/pingcap/tidb/infoschema"
"github.com/pingcap/tidb/kv"
"github.com/pingcap/tidb/parser"
"github.com/pingcap/tidb/parser/ast"
"github.com/pingcap/tidb/parser/model"
"github.com/pingcap/tidb/parser/terror"
"github.com/pingcap/tidb/planner"
"github.com/pingcap/tidb/planner/core"
"github.com/pingcap/tidb/session"
"github.com/pingcap/tidb/sessionctx/stmtctx"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/sessiontxn"
"github.com/pingcap/tidb/testkit"
"github.com/pingcap/tidb/testkit/testdata"
"github.com/pingcap/tidb/util/hint"
"github.com/stretchr/testify/require"
)
func TestDAGPlanBuilderSimpleCase(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("set tidb_opt_limit_push_down_threshold=0")
var input []string
var output []struct {
SQL string
Best string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
comment := fmt.Sprintf("case: %v, sql: %s", i, tt)
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err, comment)
require.NoError(t, sessiontxn.NewTxn(context.Background(), tk.Session()))
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p), comment)
}
}
func TestAnalyzeBuildSucc(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("create table t(a int)")
tests := []struct {
sql string
succ bool
statsVer int
}{
{
sql: "analyze table t with 0.1 samplerate",
succ: true,
statsVer: 2,
},
{
sql: "analyze table t with 0.1 samplerate",
succ: false,
statsVer: 1,
},
{
sql: "analyze table t with 10 samplerate",
succ: false,
statsVer: 2,
},
{
sql: "analyze table t with 0.1 samplerate, 100000 samples",
succ: false,
statsVer: 2,
},
{
sql: "analyze table t with 0.1 samplerate, 100000 samples",
succ: false,
statsVer: 1,
},
}
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range tests {
comment := fmt.Sprintf("The %v-th test failed", i)
tk.MustExec(fmt.Sprintf("set @@tidb_analyze_version=%v", tt.statsVer))
stmt, err := p.ParseOneStmt(tt.sql, "", "")
if tt.succ {
require.NoError(t, err, comment)
} else if err != nil {
continue
}
err = core.Preprocess(tk.Session(), stmt, core.WithPreprocessorReturn(&core.PreprocessorReturn{InfoSchema: is}))
require.NoError(t, err)
_, _, err = planner.Optimize(context.Background(), tk.Session(), stmt, is)
if tt.succ {
require.NoError(t, err, comment)
} else {
require.Error(t, err, comment)
}
}
}
func TestAnalyzeSetRate(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("create table t(a int)")
tests := []struct {
sql string
rate float64
}{
{
sql: "analyze table t",
rate: -1,
},
{
sql: "analyze table t with 0.1 samplerate",
rate: 0.1,
},
{
sql: "analyze table t with 10000 samples",
rate: -1,
},
}
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range tests {
comment := fmt.Sprintf("The %v-th test failed", i)
stmt, err := p.ParseOneStmt(tt.sql, "", "")
require.NoError(t, err, comment)
err = core.Preprocess(tk.Session(), stmt, core.WithPreprocessorReturn(&core.PreprocessorReturn{InfoSchema: is}))
require.NoError(t, err, comment)
p, _, err := planner.Optimize(context.Background(), tk.Session(), stmt, is)
require.NoError(t, err, comment)
ana := p.(*core.Analyze)
require.Equal(t, tt.rate, math.Float64frombits(ana.Opts[ast.AnalyzeOptSampleRate]))
}
}
func TestDAGPlanBuilderJoin(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
sessionVars := tk.Session().GetSessionVars()
sessionVars.ExecutorConcurrency = 4
sessionVars.SetDistSQLScanConcurrency(15)
sessionVars.SetHashJoinConcurrency(5)
var input []string
var output []struct {
SQL string
Best string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
comment := fmt.Sprintf("case:%v sql:%s", i, tt)
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err, comment)
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p), comment)
}
}
func TestDAGPlanBuilderSubquery(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("set sql_mode='STRICT_TRANS_TABLES'") // disable only full group by
sessionVars := tk.Session().GetSessionVars()
sessionVars.SetHashAggFinalConcurrency(1)
sessionVars.SetHashAggPartialConcurrency(1)
sessionVars.SetHashJoinConcurrency(5)
sessionVars.SetDistSQLScanConcurrency(15)
sessionVars.ExecutorConcurrency = 4
var input []string
var output []struct {
SQL string
Best string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
comment := fmt.Sprintf("input: %s", tt)
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err, comment)
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p), fmt.Sprintf("input: %s", tt))
}
}
func TestDAGPlanTopN(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
var input []string
var output []struct {
SQL string
Best string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
comment := fmt.Sprintf("case:%v sql:%s", i, tt)
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err, comment)
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p), comment)
}
}
func assertSameHints(t *testing.T, expected, actual []*ast.TableOptimizerHint) {
expectedStr := make([]string, 0, len(expected))
actualStr := make([]string, 0, len(actual))
for _, h := range expected {
expectedStr = append(expectedStr, hint.RestoreTableOptimizerHint(h))
}
for _, h := range actual {
actualStr = append(actualStr, hint.RestoreTableOptimizerHint(h))
}
require.ElementsMatch(t, expectedStr, actualStr)
}
func TestDAGPlanBuilderBasePhysicalPlan(t *testing.T) {
store := testkit.CreateMockStore(t)
se, err := session.CreateSession4Test(store)
require.NoError(t, err)
_, err = se.Execute(context.Background(), "use test")
require.NoError(t, err)
var input []string
var output []struct {
SQL string
Best string
Hints string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
comment := fmt.Sprintf("input: %s", tt)
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err, comment)
err = core.Preprocess(se, stmt, core.WithPreprocessorReturn(&core.PreprocessorReturn{InfoSchema: is}))
require.NoError(t, err)
p, _, err := planner.Optimize(context.TODO(), se, stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
output[i].Hints = hint.RestoreOptimizerHints(core.GenHintsFromPhysicalPlan(p))
})
require.Equal(t, output[i].Best, core.ToString(p), fmt.Sprintf("input: %s", tt))
hints := core.GenHintsFromPhysicalPlan(p)
// test the new genHints code
flat := core.FlattenPhysicalPlan(p, false)
newHints := core.GenHintsFromFlatPlan(flat)
assertSameHints(t, hints, newHints)
require.Equal(t, output[i].Hints, hint.RestoreOptimizerHints(hints), fmt.Sprintf("input: %s", tt))
}
}
func TestDAGPlanBuilderUnion(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
var input []string
var output []struct {
SQL string
Best string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
comment := fmt.Sprintf("case:%v sql:%s", i, tt)
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err, comment)
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p), comment)
}
}
func TestDAGPlanBuilderUnionScan(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
var input []string
var output []struct {
SQL string
Best string
}
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
comment := fmt.Sprintf("input: %s", tt)
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err, comment)
require.NoError(t, sessiontxn.NewTxn(context.Background(), tk.Session()))
// Make txn not read only.
txn, err := tk.Session().Txn(true)
require.NoError(t, err)
err = txn.Set(kv.Key("AAA"), []byte("BBB"))
require.NoError(t, err)
tk.Session().StmtCommit()
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p), fmt.Sprintf("input: %s", tt))
}
}
func TestDAGPlanBuilderAgg(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("set sql_mode='STRICT_TRANS_TABLES'") // disable only full group by
sessionVars := tk.Session().GetSessionVars()
sessionVars.SetHashAggFinalConcurrency(1)
sessionVars.SetHashAggPartialConcurrency(1)
sessionVars.SetDistSQLScanConcurrency(15)
sessionVars.ExecutorConcurrency = 4
var input []string
var output []struct {
SQL string
Best string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
comment := fmt.Sprintf("input: %s", tt)
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err, comment)
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p), fmt.Sprintf("input: %s", tt))
}
}
func TestRefine(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
var input []string
var output []struct {
SQL string
Best string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
comment := fmt.Sprintf("input: %s", tt)
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err, comment)
sc := tk.Session().GetSessionVars().StmtCtx
sc.IgnoreTruncate = false
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err, comment)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p), comment)
}
}
func TestAggEliminator(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("set tidb_opt_limit_push_down_threshold=0")
tk.MustExec("set sql_mode='STRICT_TRANS_TABLES'") // disable only full group by
var input []string
var output []struct {
SQL string
Best string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
comment := fmt.Sprintf("input: %s", tt)
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err, comment)
sc := tk.Session().GetSessionVars().StmtCtx
sc.IgnoreTruncate = false
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p), fmt.Sprintf("input: %s", tt))
}
}
func TestINMJHint(t *testing.T) {
var (
input []string
output []struct {
SQL string
Plan []string
Result []string
}
)
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop table if exists t1, t2")
tk.MustExec("create table t1(a int primary key, b int not null)")
tk.MustExec("create table t2(a int primary key, b int not null)")
tk.MustExec("insert into t1 values(1,1),(2,2)")
tk.MustExec("insert into t2 values(1,1),(2,1)")
for i, ts := range input {
testdata.OnRecord(func() {
output[i].SQL = ts
output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery("explain format = 'brief' " + ts).Rows())
output[i].Result = testdata.ConvertRowsToStrings(tk.MustQuery(ts).Sort().Rows())
})
tk.MustQuery("explain format = 'brief' " + ts).Check(testkit.Rows(output[i].Plan...))
tk.MustQuery(ts).Sort().Check(testkit.Rows(output[i].Result...))
}
}
func TestEliminateMaxOneRow(t *testing.T) {
var (
input []string
output []struct {
SQL string
Plan []string
Result []string
}
)
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop table if exists t1;")
tk.MustExec("drop table if exists t2;")
tk.MustExec("drop table if exists t3;")
tk.MustExec("create table t1(a int(11) DEFAULT NULL, b int(11) DEFAULT NULL, UNIQUE KEY idx_a (a))")
tk.MustExec("create table t2(a int(11) DEFAULT NULL, b int(11) DEFAULT NULL)")
tk.MustExec("create table t3(a int(11) DEFAULT NULL, b int(11) DEFAULT NULL, c int(11) DEFAULT NULL, UNIQUE KEY idx_abc (a, b, c))")
for i, ts := range input {
testdata.OnRecord(func() {
output[i].SQL = ts
output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery("explain format = 'brief' " + ts).Rows())
output[i].Result = testdata.ConvertRowsToStrings(tk.MustQuery(ts).Sort().Rows())
})
tk.MustQuery("explain format = 'brief' " + ts).Check(testkit.Rows(output[i].Plan...))
tk.MustQuery(ts).Check(testkit.Rows(output[i].Result...))
}
}
type overrideStore struct{ kv.Storage }
func (store overrideStore) GetClient() kv.Client {
cli := store.Storage.GetClient()
return overrideClient{cli}
}
type overrideClient struct{ kv.Client }
func (cli overrideClient) IsRequestTypeSupported(_, _ int64) bool {
return false
}
func TestRequestTypeSupportedOff(t *testing.T) {
store := testkit.CreateMockStore(t)
se, err := session.CreateSession4Test(overrideStore{store})
require.NoError(t, err)
_, err = se.Execute(context.Background(), "use test")
require.NoError(t, err)
sql := "select * from t where a in (1, 10, 20)"
expect := "TableReader(Table(t))->Sel([in(test.t.a, 1, 10, 20)])"
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
stmt, err := parser.New().ParseOneStmt(sql, "", "")
require.NoError(t, err)
p, _, err := planner.Optimize(context.TODO(), se, stmt, is)
require.NoError(t, err)
require.Equal(t, expect, core.ToString(p), fmt.Sprintf("sql: %s", sql))
}
func TestIndexJoinUnionScan(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("create table t (a int primary key, b int, index idx(a))")
tk.MustExec("create table tt (a int primary key) partition by range (a) (partition p0 values less than (100), partition p1 values less than (200))")
tk.MustExec(`set @@tidb_partition_prune_mode='` + string(variable.Static) + `'`)
var input [][]string
var output []struct {
SQL []string
Plan []string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
for i, ts := range input {
tk.MustExec("begin")
for j, tt := range ts {
if j != len(ts)-1 {
tk.MustExec(tt)
}
testdata.OnRecord(func() {
output[i].SQL = ts
if j == len(ts)-1 {
output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery(tt).Rows())
}
})
if j == len(ts)-1 {
tk.MustQuery(tt).Check(testkit.Rows(output[i].Plan...))
}
}
tk.MustExec("rollback")
}
}
func TestMergeJoinUnionScan(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("create table t1 (c_int int, c_str varchar(40), primary key (c_int))")
tk.MustExec("create table t2 (c_int int, c_str varchar(40), primary key (c_int))")
tk.MustExec("insert into t1 (`c_int`, `c_str`) values (11, 'keen williamson'), (10, 'gracious hermann')")
tk.MustExec("insert into t2 (`c_int`, `c_str`) values (10, 'gracious hermann')")
var input [][]string
var output []struct {
SQL []string
Plan []string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
for i, ts := range input {
tk.MustExec("begin")
for j, tt := range ts {
if j != len(ts)-1 {
tk.MustExec(tt)
}
testdata.OnRecord(func() {
output[i].SQL = ts
if j == len(ts)-1 {
output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery(tt).Rows())
}
})
if j == len(ts)-1 {
tk.MustQuery(tt).Check(testkit.Rows(output[i].Plan...))
}
}
tk.MustExec("rollback")
}
}
func TestDoSubQuery(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tests := []struct {
sql string
best string
}{
{
sql: "do 1 in (select a from t)",
best: "LeftHashJoin{Dual->PointGet(Handle(t.a)1)}->Projection",
},
}
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for _, tt := range tests {
comment := fmt.Sprintf("for %s", tt.sql)
stmt, err := p.ParseOneStmt(tt.sql, "", "")
require.NoError(t, err, comment)
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
require.Equal(t, tt.best, core.ToString(p), comment)
}
}
func TestIndexLookupCartesianJoin(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
stmt, err := parser.New().ParseOneStmt("select /*+ TIDB_INLJ(t1, t2) */ * from t t1 join t t2", "", "")
require.NoError(t, err)
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
require.Equal(t, "LeftHashJoin{TableReader(Table(t))->TableReader(Table(t))}", core.ToString(p))
warnings := tk.Session().GetSessionVars().StmtCtx.GetWarnings()
lastWarn := warnings[len(warnings)-1]
err = core.ErrInternal.GenWithStack("TIDB_INLJ hint is inapplicable without column equal ON condition")
require.True(t, terror.ErrorEqual(err, lastWarn.Err))
}
func TestSemiJoinToInner(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
var input []string
var output []struct {
SQL string
Best string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, tt := range input {
stmt, err := p.ParseOneStmt(tt, "", "")
require.NoError(t, err)
p, _, err := planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = tt
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p))
}
}
func TestUnmatchedTableInHint(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
var input []string
var output []struct {
SQL string
Warning string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, test := range input {
tk.Session().GetSessionVars().StmtCtx.SetWarnings(nil)
stmt, err := p.ParseOneStmt(test, "", "")
require.NoError(t, err)
_, _, err = planner.Optimize(context.TODO(), tk.Session(), stmt, is)
require.NoError(t, err)
warnings := tk.Session().GetSessionVars().StmtCtx.GetWarnings()
testdata.OnRecord(func() {
output[i].SQL = test
if len(warnings) > 0 {
output[i].Warning = warnings[0].Err.Error()
}
})
if output[i].Warning == "" {
require.Len(t, warnings, 0)
} else {
require.Len(t, warnings, 1)
require.Equal(t, stmtctx.WarnLevelWarning, warnings[0].Level)
require.Equal(t, output[i].Warning, warnings[0].Err.Error())
}
}
}
func TestHintScope(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
var input []string
var output []struct {
SQL string
Best string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, test := range input {
comment := fmt.Sprintf("case:%v sql:%s", i, test)
stmt, err := p.ParseOneStmt(test, "", "")
require.NoError(t, err, comment)
p, _, err := planner.Optimize(context.Background(), tk.Session(), stmt, is)
require.NoError(t, err)
testdata.OnRecord(func() {
output[i].SQL = test
output[i].Best = core.ToString(p)
})
require.Equal(t, output[i].Best, core.ToString(p))
warnings := tk.Session().GetSessionVars().StmtCtx.GetWarnings()
require.Len(t, warnings, 0, comment)
}
}
func TestJoinHints(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
var input []string
var output []struct {
SQL string
Best string
Warning string
Hints string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
ctx := context.Background()
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, test := range input {
comment := fmt.Sprintf("case:%v sql:%s", i, test)
stmt, err := p.ParseOneStmt(test, "", "")
require.NoError(t, err, comment)
tk.Session().GetSessionVars().StmtCtx.SetWarnings(nil)
p, _, err := planner.Optimize(ctx, tk.Session(), stmt, is)
require.NoError(t, err)
warnings := tk.Session().GetSessionVars().StmtCtx.GetWarnings()
testdata.OnRecord(func() {
output[i].SQL = test
output[i].Best = core.ToString(p)
if len(warnings) > 0 {
output[i].Warning = warnings[0].Err.Error()
}
output[i].Hints = hint.RestoreOptimizerHints(core.GenHintsFromPhysicalPlan(p))
})
require.Equal(t, output[i].Best, core.ToString(p))
if output[i].Warning == "" {
require.Len(t, warnings, 0)
} else {
require.Len(t, warnings, 1, fmt.Sprintf("%v", warnings))
require.Equal(t, stmtctx.WarnLevelWarning, warnings[0].Level)
require.Equal(t, output[i].Warning, warnings[0].Err.Error())
}
hints := core.GenHintsFromPhysicalPlan(p)
// test the new genHints code
flat := core.FlattenPhysicalPlan(p, false)
newHints := core.GenHintsFromFlatPlan(flat)
assertSameHints(t, hints, newHints)
require.Equal(t, output[i].Hints, hint.RestoreOptimizerHints(hints), comment)
}
}
func TestAggregationHints(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
sessionVars := tk.Session().GetSessionVars()
sessionVars.SetHashAggFinalConcurrency(1)
sessionVars.SetHashAggPartialConcurrency(1)
var input []struct {
SQL string
AggPushDown bool
}
var output []struct {
SQL string
Best string
Warning string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
ctx := context.Background()
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, test := range input {
comment := fmt.Sprintf("case: %v sql: %v", i, test)
tk.Session().GetSessionVars().StmtCtx.SetWarnings(nil)
tk.Session().GetSessionVars().AllowAggPushDown = test.AggPushDown
stmt, err := p.ParseOneStmt(test.SQL, "", "")
require.NoError(t, err, comment)
p, _, err := planner.Optimize(ctx, tk.Session(), stmt, is)
require.NoError(t, err)
warnings := tk.Session().GetSessionVars().StmtCtx.GetWarnings()
testdata.OnRecord(func() {
output[i].SQL = test.SQL
output[i].Best = core.ToString(p)
if len(warnings) > 0 {
output[i].Warning = warnings[0].Err.Error()
}
})
require.Equal(t, output[i].Best, core.ToString(p), comment)
if output[i].Warning == "" {
require.Len(t, warnings, 0)
} else {
require.Len(t, warnings, 1, fmt.Sprintf("%v", warnings))
require.Equal(t, stmtctx.WarnLevelWarning, warnings[0].Level)
require.Equal(t, output[i].Warning, warnings[0].Err.Error())
}
}
}
func TestSemiJoinRewriteHints(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("create table t(a int, b int, c int)")
sessionVars := tk.Session().GetSessionVars()
sessionVars.SetHashAggFinalConcurrency(1)
sessionVars.SetHashAggPartialConcurrency(1)
var input []string
var output []struct {
SQL string
Plan []string
Warning string
}
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
ctx := context.Background()
p := parser.New()
is := infoschema.MockInfoSchema([]*model.TableInfo{core.MockSignedTable(), core.MockUnsignedTable()})
for i, test := range input {
comment := fmt.Sprintf("case: %v sql: %v", i, test)
tk.Session().GetSessionVars().StmtCtx.SetWarnings(nil)
stmt, err := p.ParseOneStmt(test, "", "")
require.NoError(t, err, comment)
_, _, err = planner.Optimize(ctx, tk.Session(), stmt, is)
require.NoError(t, err)
warnings := tk.Session().GetSessionVars().StmtCtx.GetWarnings()
testdata.OnRecord(func() {
output[i].SQL = test
output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery("explain format = 'brief'" + test).Rows())
if len(warnings) > 0 {
output[i].Warning = warnings[0].Err.Error()
}
})
tk.MustQuery("explain format = 'brief'" + test).Check(testkit.Rows(output[i].Plan...))
if output[i].Warning == "" {
require.Len(t, warnings, 0)
} else {
require.Len(t, warnings, 1, fmt.Sprintf("%v", warnings))
require.Equal(t, stmtctx.WarnLevelWarning, warnings[0].Level)
require.Equal(t, output[i].Warning, warnings[0].Err.Error())
}
}
}
func TestExplainJoinHints(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop table if exists t")
tk.MustExec("create table t(a int, b int, c int, key(b), key(c))")
tk.MustQuery("explain format='hint' select /*+ inl_merge_join(t2) */ * from t t1 inner join t t2 on t1.b = t2.b and t1.c = 1").Check(testkit.Rows(
"inl_merge_join(@`sel_1` `test`.`t2`), use_index(@`sel_1` `test`.`t1` `c`), use_index(@`sel_1` `test`.`t2` `b`), inl_merge_join(`t2`)",
))
tk.MustQuery("explain format='hint' select /*+ inl_hash_join(t2) */ * from t t1 inner join t t2 on t1.b = t2.b and t1.c = 1").Check(testkit.Rows(
"inl_hash_join(@`sel_1` `test`.`t2`), use_index(@`sel_1` `test`.`t1` `c`), use_index(@`sel_1` `test`.`t2` `b`), inl_hash_join(`t2`)",
))
}
func TestAggToCopHint(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop table if exists ta")
tk.MustExec("create table ta(a int, b int, index(a))")
var (
input []string
output []struct {
SQL string
Best string
Warning string
}
)
planSuiteData := core.GetPlanSuiteData()
planSuiteData.LoadTestCases(t, &input, &output)
ctx := context.Background()
is := domain.GetDomain(tk.Session()).InfoSchema()
p := parser.New()
for i, test := range input {