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This is an automated cherry-pick of #38537
Signed-off-by: ti-chi-bot <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,151 @@ | ||
| // Copyright 2022 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 ( | ||
| "errors" | ||
| "fmt" | ||
| "math/rand" | ||
| "strconv" | ||
| "strings" | ||
| "testing" | ||
|
|
||
| "github.com/pingcap/tidb/expression" | ||
| "github.com/pingcap/tidb/parser/mysql" | ||
| plannercore "github.com/pingcap/tidb/planner/core" | ||
| "github.com/pingcap/tidb/testkit" | ||
| "github.com/pingcap/tidb/types" | ||
| "github.com/pingcap/tidb/util" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| type mockParameterizer struct { | ||
| action string | ||
| } | ||
|
|
||
| func (mp *mockParameterizer) Parameterize(originSQL string) (paramSQL string, params []expression.Expression, ok bool, err error) { | ||
| switch mp.action { | ||
| case "error": | ||
| return "", nil, false, errors.New("error") | ||
| case "not_support": | ||
| return "", nil, false, nil | ||
| } | ||
| // only support SQL like 'select * from t where col {op} {int} and ...' | ||
| prefix := "select * from t where " | ||
| if !strings.HasPrefix(originSQL, prefix) { | ||
| return "", nil, false, nil | ||
| } | ||
| buf := make([]byte, 0, 32) | ||
| buf = append(buf, prefix...) | ||
| for i, condStr := range strings.Split(originSQL[len(prefix):], "and") { | ||
| if i > 0 { | ||
| buf = append(buf, " and "...) | ||
| } | ||
| tmp := strings.Split(strings.TrimSpace(condStr), " ") | ||
| if len(tmp) != 3 { // col {op} {val} | ||
| return "", nil, false, nil | ||
| } | ||
| buf = append(buf, tmp[0]...) | ||
| buf = append(buf, tmp[1]...) | ||
| buf = append(buf, '?') | ||
|
|
||
| intParam, err := strconv.Atoi(tmp[2]) | ||
| if err != nil { | ||
| return "", nil, false, nil | ||
| } | ||
| params = append(params, &expression.Constant{Value: types.NewDatum(intParam), RetType: types.NewFieldType(mysql.TypeLong)}) | ||
| } | ||
| return string(buf), params, true, nil | ||
| } | ||
|
|
||
| func TestInitLRUWithSystemVar(t *testing.T) { | ||
| store := testkit.CreateMockStore(t) | ||
| tk := testkit.NewTestKit(t, store) | ||
| tk.MustExec("set @@session.tidb_prepared_plan_cache_size = 0") // MinValue: 1 | ||
| tk.MustQuery("select @@session.tidb_prepared_plan_cache_size").Check(testkit.Rows("1")) | ||
| sessionVar := tk.Session().GetSessionVars() | ||
|
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| lru := plannercore.NewLRUPlanCache(uint(sessionVar.PreparedPlanCacheSize), 0, 0, plannercore.PickPlanFromBucket) | ||
| require.NotNil(t, lru) | ||
| } | ||
|
|
||
| func TestGeneralPlanCacheBasically(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, d int, primary key(a), key(b), key(c, d))`) | ||
| for i := 0; i < 20; i++ { | ||
| tk.MustExec(fmt.Sprintf("insert into t values (%v, %v, %v, %v)", i, rand.Intn(20), rand.Intn(20), rand.Intn(20))) | ||
| } | ||
|
|
||
| queries := []string{ | ||
| "select * from t where a<10", | ||
| "select * from t where a<13 and b<15", | ||
| "select * from t where b=13", | ||
| "select * from t where c<8", | ||
| "select * from t where d>8", | ||
| "select * from t where c=8 and d>10", | ||
| "select * from t where a<12 and b<13 and c<12 and d>2", | ||
| } | ||
|
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||
| for _, query := range queries { | ||
| tk.MustExec(`set tidb_enable_general_plan_cache=0`) | ||
| resultNormal := tk.MustQuery(query).Sort() | ||
| tk.MustQuery(`select @@last_plan_from_cache`).Check(testkit.Rows("0")) | ||
|
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||
| tk.MustExec(`set tidb_enable_general_plan_cache=1`) | ||
| tk.MustQuery(query) // first process | ||
| tk.MustQuery(query).Sort().Check(resultNormal.Rows()) // equal to the result without plan-cache | ||
| tk.MustQuery(`select @@last_plan_from_cache`).Check(testkit.Rows("1")) // this plan is from plan-cache | ||
| } | ||
| } | ||
|
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||
| func TestIssue38269(t *testing.T) { | ||
| store := testkit.CreateMockStore(t) | ||
| tk := testkit.NewTestKit(t, store) | ||
| tk.MustExec(`set @@tidb_enable_prepared_plan_cache=1`) | ||
| tk.MustExec("set @@tidb_enable_collect_execution_info=0") | ||
| tk.MustExec("use test") | ||
| tk.MustExec("create table t1(a int)") | ||
| tk.MustExec("create table t2(a int, b int, c int, index idx(a, b))") | ||
| tk.MustExec("prepare stmt1 from 'select /*+ inl_join(t2) */ * from t1 join t2 on t1.a = t2.a where t2.b in (?, ?, ?)'") | ||
| tk.MustExec("set @a = 10, @b = 20, @c = 30, @d = 40, @e = 50, @f = 60") | ||
| tk.MustExec("execute stmt1 using @a, @b, @c") | ||
| tk.MustExec("execute stmt1 using @d, @e, @f") | ||
| tkProcess := tk.Session().ShowProcess() | ||
| ps := []*util.ProcessInfo{tkProcess} | ||
| tk.Session().SetSessionManager(&testkit.MockSessionManager{PS: ps}) | ||
| rows := tk.MustQuery(fmt.Sprintf("explain for connection %d", tkProcess.ID)).Rows() | ||
| require.Contains(t, rows[6][4], "range: decided by [eq(test.t2.a, test.t1.a) in(test.t2.b, 40, 50, 60)]") | ||
| } | ||
|
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| func TestIssue38533(t *testing.T) { | ||
| store := testkit.CreateMockStore(t) | ||
| tk := testkit.NewTestKit(t, store) | ||
| tk.MustExec("use test") | ||
| tk.MustExec("create table t (a int, key (a))") | ||
| tk.MustExec(`prepare st from "select /*+ use_index(t, a) */ a from t where a=? and a=?"`) | ||
| tk.MustExec(`set @a=1`) | ||
| tk.MustExec(`execute st using @a, @a`) | ||
| tkProcess := tk.Session().ShowProcess() | ||
| ps := []*util.ProcessInfo{tkProcess} | ||
| tk.Session().SetSessionManager(&testkit.MockSessionManager{PS: ps}) | ||
| plan := tk.MustQuery(fmt.Sprintf("explain for connection %d", tkProcess.ID)).Rows() | ||
| require.True(t, strings.Contains(plan[1][0].(string), "RangeScan")) // range-scan instead of full-scan | ||
|
|
||
| tk.MustExec(`execute st using @a, @a`) | ||
| tk.MustExec(`execute st using @a, @a`) | ||
| tk.MustQuery("select @@last_plan_from_cache").Check(testkit.Rows("0")) | ||
| } |
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