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// Copyright 2018 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 core_test
import (
"context"
"math"
"strconv"
"time"
. "github.com/pingcap/check"
"github.com/pingcap/parser/auth"
"github.com/pingcap/parser/terror"
"github.com/pingcap/tidb/executor"
"github.com/pingcap/tidb/infoschema"
"github.com/pingcap/tidb/kv"
"github.com/pingcap/tidb/metrics"
"github.com/pingcap/tidb/planner/core"
"github.com/pingcap/tidb/session"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/util/hint"
"github.com/pingcap/tidb/util/kvcache"
"github.com/pingcap/tidb/util/testkit"
"github.com/pingcap/tidb/util/testleak"
"github.com/prometheus/client_golang/prometheus"
dto "github.com/prometheus/client_model/go"
)
var _ = Suite(&testPrepareSuite{})
var _ = SerialSuites(&testPrepareSerialSuite{})
type testPrepareSuite struct {
}
type testPrepareSerialSuite struct {
}
func (s *testPrepareSerialSuite) TestPrepareCache(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
tk.MustExec("use test")
tk.MustExec("drop table if exists t")
tk.MustExec("create table t(a int primary key, b int, c int, index idx1(b, a), index idx2(b))")
tk.MustExec("insert into t values(1, 1, 1), (2, 2, 2), (3, 3, 3), (4, 4, 4), (5, 5, 5), (6, 1, 2)")
tk.MustExec(`prepare stmt1 from "select * from t use index(idx1) where a = ? and b = ?"`)
tk.MustExec(`prepare stmt2 from "select a, b from t use index(idx2) where b = ?"`)
tk.MustExec(`prepare stmt3 from "select * from t where a = ?"`)
tk.MustExec("set @a=1, @b=1")
// When executing one statement at the first time, we don't use cache, so we need to execute it at least twice to test the cache.
tk.MustQuery("execute stmt1 using @a, @b").Check(testkit.Rows("1 1 1"))
tk.MustQuery("execute stmt1 using @a, @b").Check(testkit.Rows("1 1 1"))
tk.MustQuery("execute stmt2 using @b").Check(testkit.Rows("1 1", "6 1"))
tk.MustQuery("execute stmt2 using @b").Check(testkit.Rows("1 1", "6 1"))
tk.MustQuery("execute stmt3 using @a").Check(testkit.Rows("1 1 1"))
tk.MustQuery("execute stmt3 using @a").Check(testkit.Rows("1 1 1"))
tk.MustExec(`prepare stmt4 from "select * from t where a > ?"`)
tk.MustExec("set @a=3")
tk.MustQuery("execute stmt4 using @a").Check(testkit.Rows("4 4 4", "5 5 5", "6 1 2"))
tk.MustQuery("execute stmt4 using @a").Check(testkit.Rows("4 4 4", "5 5 5", "6 1 2"))
tk.MustExec(`prepare stmt5 from "select c from t order by c"`)
tk.MustQuery("execute stmt5").Check(testkit.Rows("1", "2", "2", "3", "4", "5"))
tk.MustQuery("execute stmt5").Check(testkit.Rows("1", "2", "2", "3", "4", "5"))
tk.MustExec(`prepare stmt6 from "select distinct a from t order by a"`)
tk.MustQuery("execute stmt6").Check(testkit.Rows("1", "2", "3", "4", "5", "6"))
tk.MustQuery("execute stmt6").Check(testkit.Rows("1", "2", "3", "4", "5", "6"))
// test privilege change
rootSe := tk.Se
tk.MustExec("drop table if exists tp")
tk.MustExec(`create table tp(c1 int, c2 int, primary key (c1))`)
tk.MustExec(`insert into tp values(1, 1), (2, 2), (3, 3)`)
tk.MustExec(`create user 'u_tp'@'localhost'`)
tk.MustExec(`grant select on test.tp to u_tp@'localhost';flush privileges;`)
// user u_tp
userSess := newSession(c, store, "test")
c.Assert(userSess.Auth(&auth.UserIdentity{Username: "u_tp", Hostname: "localhost"}, nil, nil), IsTrue)
mustExec(c, userSess, `prepare ps_stp_r from 'select * from tp where c1 > ?'`)
mustExec(c, userSess, `set @p2 = 2`)
tk.Se = userSess
tk.MustQuery(`execute ps_stp_r using @p2`).Check(testkit.Rows("3 3"))
tk.MustQuery(`execute ps_stp_r using @p2`).Check(testkit.Rows("3 3"))
tk.MustQuery(`execute ps_stp_r using @p2`).Check(testkit.Rows("3 3"))
// root revoke
tk.Se = rootSe
tk.MustExec(`revoke all on test.tp from 'u_tp'@'localhost';flush privileges;`)
// user u_tp
tk.Se = userSess
_, err = tk.Exec(`execute ps_stp_r using @p2`)
c.Assert(err, NotNil)
// grant again
tk.Se = rootSe
tk.MustExec(`grant select on test.tp to u_tp@'localhost';flush privileges;`)
// user u_tp
tk.Se = userSess
tk.MustQuery(`execute ps_stp_r using @p2`).Check(testkit.Rows("3 3"))
tk.MustQuery(`execute ps_stp_r using @p2`).Check(testkit.Rows("3 3"))
// restore
tk.Se = rootSe
tk.MustExec("drop table if exists tp")
tk.MustExec(`DROP USER 'u_tp'@'localhost';`)
// Test issue https://github.com/pingcap/tidb/issues/17491.
tk.MustExec("drop table if exists point_get_test")
tk.MustExec("create table point_get_test(a varchar(20), b int, unique index idx(a))")
tk.MustExec("insert into point_get_test values('aaa', 1), (NULL, 1), (NULL, 1)")
tk.MustExec(`prepare pt_stmt from "select * from point_get_test where a = ? and b = ?"`)
tk.MustExec(`set @a = "aaa", @b = 1`)
tk.MustQuery("execute pt_stmt using @a, @b").Check(testkit.Rows("aaa 1"))
tk.MustExec(`set @a = "bbb", @b = 1`)
tk.MustQuery("execute pt_stmt using @a, @b").Check(testkit.Rows())
tk.MustExec(`set @a = NULL, @b = 1`)
tk.MustQuery("execute pt_stmt using @a, @b").Check(testkit.Rows())
}
func (s *testPrepareSerialSuite) TestPrepareCacheIndexScan(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
tk.MustExec("use test")
tk.MustExec("drop table if exists t")
tk.MustExec("create table t(a int, b int, c int, primary key (a, b))")
tk.MustExec("insert into t values(1, 1, 2), (1, 2, 3), (1, 3, 3), (2, 1, 2), (2, 2, 3), (2, 3, 3)")
tk.MustExec(`prepare stmt1 from "select a, c from t where a = ? and c = ?"`)
tk.MustExec("set @a=1, @b=3")
// When executing one statement at the first time, we don't use cache, so we need to execute it at least twice to test the cache.
tk.MustQuery("execute stmt1 using @a, @b").Check(testkit.Rows("1 3", "1 3"))
tk.MustQuery("execute stmt1 using @a, @b").Check(testkit.Rows("1 3", "1 3"))
}
func (s *testPlanSerialSuite) TestPrepareCacheDeferredFunction(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
tk.MustExec("use test")
tk.MustExec("drop table if exists t1")
tk.MustExec("create table t1 (id int PRIMARY KEY, c1 TIMESTAMP(3) NOT NULL DEFAULT '2019-01-14 10:43:20', KEY idx1 (c1))")
tk.MustExec("prepare sel1 from 'select id, c1 from t1 where c1 < now(3)'")
sql1 := "execute sel1"
expectedPattern := `IndexReader\(Index\(t1.idx1\)\[\[-inf,[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1]) (2[0-3]|[01][0-9]):[0-5][0-9]:[0-5][0-9].[0-9][0-9][0-9]\)\]\)`
var cnt [2]float64
var planStr [2]string
metrics.ResettablePlanCacheCounterFortTest = true
metrics.PlanCacheCounter.Reset()
counter := metrics.PlanCacheCounter.WithLabelValues("prepare")
ctx := context.TODO()
for i := 0; i < 2; i++ {
stmt, err := s.ParseOneStmt(sql1, "", "")
c.Check(err, IsNil)
is := tk.Se.GetSessionVars().TxnCtx.InfoSchema.(infoschema.InfoSchema)
builder := core.NewPlanBuilder(tk.Se, is, &hint.BlockHintProcessor{})
p, err := builder.Build(ctx, stmt)
c.Check(err, IsNil)
execPlan, ok := p.(*core.Execute)
c.Check(ok, IsTrue)
executor.ResetContextOfStmt(tk.Se, stmt)
err = execPlan.OptimizePreparedPlan(ctx, tk.Se, is)
c.Check(err, IsNil)
planStr[i] = core.ToString(execPlan.Plan)
c.Check(planStr[i], Matches, expectedPattern, Commentf("for %dth %s", i, sql1))
pb := &dto.Metric{}
counter.Write(pb)
cnt[i] = pb.GetCounter().GetValue()
c.Check(cnt[i], Equals, float64(i))
time.Sleep(time.Millisecond * 10)
}
c.Assert(planStr[0] < planStr[1], IsTrue, Commentf("plan 1: %v, plan 2: %v", planStr[0], planStr[1]))
}
func (s *testPrepareSerialSuite) TestPrepareCacheNow(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
tk.MustExec("use test")
tk.MustExec(`prepare stmt1 from "select now(), current_timestamp(), utc_timestamp(), unix_timestamp(), sleep(0.1), now(), current_timestamp(), utc_timestamp(), unix_timestamp()"`)
// When executing one statement at the first time, we don't usTestPrepareCacheDeferredFunctione cache, so we need to execute it at least twice to test the cache.
_ = tk.MustQuery("execute stmt1").Rows()
rs := tk.MustQuery("execute stmt1").Rows()
c.Assert(rs[0][0].(string), Equals, rs[0][5].(string))
c.Assert(rs[0][1].(string), Equals, rs[0][6].(string))
c.Assert(rs[0][2].(string), Equals, rs[0][7].(string))
c.Assert(rs[0][3].(string), Equals, rs[0][8].(string))
}
func (s *testPrepareSuite) TestPrepareOverMaxPreparedStmtCount(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
defer func() {
dom.Close()
store.Close()
}()
tk.MustExec("use test")
// test prepare and deallocate.
prePrepared := readGaugeInt(metrics.PreparedStmtGauge)
tk.MustExec(`prepare stmt1 from "select 1"`)
onePrepared := readGaugeInt(metrics.PreparedStmtGauge)
c.Assert(prePrepared+1, Equals, onePrepared)
tk.MustExec(`deallocate prepare stmt1`)
deallocPrepared := readGaugeInt(metrics.PreparedStmtGauge)
c.Assert(prePrepared, Equals, deallocPrepared)
// test change global limit and make it affected in test session.
tk.MustQuery("select @@max_prepared_stmt_count").Check(testkit.Rows("-1"))
tk.MustExec("set @@global.max_prepared_stmt_count = 2")
tk.MustQuery("select @@global.max_prepared_stmt_count").Check(testkit.Rows("2"))
// Disable global variable cache, so load global session variable take effect immediate.
dom.GetGlobalVarsCache().Disable()
// test close session to give up all prepared stmt
tk.MustExec(`prepare stmt2 from "select 1"`)
prePrepared = readGaugeInt(metrics.PreparedStmtGauge)
tk.Se.Close()
drawPrepared := readGaugeInt(metrics.PreparedStmtGauge)
c.Assert(prePrepared-1, Equals, drawPrepared)
// test meet max limit.
tk.Se = nil
tk.MustQuery("select @@max_prepared_stmt_count").Check(testkit.Rows("2"))
for i := 1; ; i++ {
prePrepared = readGaugeInt(metrics.PreparedStmtGauge)
if prePrepared >= 2 {
_, err = tk.Exec(`prepare stmt` + strconv.Itoa(i) + ` from "select 1"`)
c.Assert(terror.ErrorEqual(err, variable.ErrMaxPreparedStmtCountReached), IsTrue)
break
}
tk.Exec(`prepare stmt` + strconv.Itoa(i) + ` from "select 1"`)
}
}
// unit test for issue https://github.com/pingcap/tidb/issues/8518
func (s *testPrepareSerialSuite) TestPrepareTableAsNameOnGroupByWithCache(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
tk.MustExec("use test")
tk.MustExec("drop table if exists t1")
tk.MustExec(`create table t1 (
id int(11) unsigned not null primary key auto_increment,
partner_id varchar(35) not null,
t1_status_id int(10) unsigned
);`)
tk.MustExec(`insert into t1 values ("1", "partner1", "10"), ("2", "partner2", "10"), ("3", "partner3", "10"), ("4", "partner4", "10");`)
tk.MustExec("drop table if exists t3")
tk.MustExec(`create table t3 (
id int(11) not null default '0',
preceding_id int(11) not null default '0',
primary key (id,preceding_id)
);`)
tk.MustExec(`prepare stmt from 'SELECT DISTINCT t1.partner_id
FROM t1
LEFT JOIN t3 ON t1.id = t3.id
LEFT JOIN t1 pp ON pp.id = t3.preceding_id
GROUP BY t1.id ;'`)
tk.MustQuery("execute stmt").Sort().Check(testkit.Rows("partner1", "partner2", "partner3", "partner4"))
}
func readGaugeInt(g prometheus.Gauge) int {
ch := make(chan prometheus.Metric, 1)
g.Collect(ch)
m := <-ch
mm := &dto.Metric{}
m.Write(mm)
return int(mm.GetGauge().GetValue())
}
// unit test for issue https://github.com/pingcap/tidb/issues/9478
func (s *testPrepareSuite) TestPrepareWithWindowFunction(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
defer func() {
dom.Close()
store.Close()
}()
tk.MustExec("set @@tidb_enable_window_function = 1")
defer func() {
tk.MustExec("set @@tidb_enable_window_function = 0")
}()
tk.MustExec("use test")
tk.MustExec("create table window_prepare(a int, b double)")
tk.MustExec("insert into window_prepare values(1, 1.1), (2, 1.9)")
tk.MustExec("prepare stmt1 from 'select row_number() over() from window_prepare';")
// Test the unnamed window can be executed successfully.
tk.MustQuery("execute stmt1").Check(testkit.Rows("1", "2"))
// Test the stmt can be prepared successfully.
tk.MustExec("prepare stmt2 from 'select count(a) over (order by a rows between ? preceding and ? preceding) from window_prepare'")
tk.MustExec("set @a=0, @b=1;")
tk.MustQuery("execute stmt2 using @a, @b").Check(testkit.Rows("0", "0"))
}
func (s *testPrepareSuite) TestPrepareForGroupByItems(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
defer func() {
dom.Close()
store.Close()
}()
tk.MustExec("use test")
tk.MustExec("drop table if exists t")
tk.MustExec("create table t(id int, v int)")
tk.MustExec("insert into t(id, v) values(1, 2),(1, 2),(2, 3);")
tk.MustExec("prepare s1 from 'select max(v) from t group by floor(id/?)';")
tk.MustExec("set @a=2;")
tk.MustQuery("execute s1 using @a;").Sort().Check(testkit.Rows("2", "3"))
tk.MustExec("prepare s1 from 'select max(v) from t group by ?';")
tk.MustExec("set @a=2;")
err = tk.ExecToErr("execute s1 using @a;")
c.Assert(err.Error(), Equals, "Unknown column '2' in 'group statement'")
tk.MustExec("set @a=2.0;")
tk.MustQuery("execute s1 using @a;").Check(testkit.Rows("3"))
}
func (s *testPrepareSerialSuite) TestPrepareCacheForPartition(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
tk.MustExec("use test")
// Test for PointGet and IndexRead.
tk.MustExec("drop table if exists t_index_read")
tk.MustExec("create table t_index_read (id int, k int, c varchar(10), primary key (id, k)) partition by hash(id+k) partitions 10")
tk.MustExec("insert into t_index_read values (1, 2, 'abc'), (3, 4, 'def'), (5, 6, 'xyz')")
tk.MustExec("prepare stmt1 from 'select c from t_index_read where id = ? and k = ?;'")
tk.MustExec("set @id=1, @k=2")
// When executing one statement at the first time, we don't use cache, so we need to execute it at least twice to test the cache.
tk.MustQuery("execute stmt1 using @id, @k").Check(testkit.Rows("abc"))
tk.MustQuery("execute stmt1 using @id, @k").Check(testkit.Rows("abc"))
tk.MustExec("set @id=5, @k=6")
tk.MustQuery("execute stmt1 using @id, @k").Check(testkit.Rows("xyz"))
tk.MustExec("prepare stmt2 from 'select c from t_index_read where id = ? and k = ? and 1 = 1;'")
tk.MustExec("set @id=1, @k=2")
tk.MustQuery("execute stmt2 using @id, @k").Check(testkit.Rows("abc"))
tk.MustQuery("execute stmt2 using @id, @k").Check(testkit.Rows("abc"))
tk.MustExec("set @id=5, @k=6")
tk.MustQuery("execute stmt2 using @id, @k").Check(testkit.Rows("xyz"))
// Test for TableScan.
tk.MustExec("drop table if exists t_table_read")
tk.MustExec("create table t_table_read (id int, k int, c varchar(10), primary key(id)) partition by hash(id) partitions 10")
tk.MustExec("insert into t_table_read values (1, 2, 'abc'), (3, 4, 'def'), (5, 6, 'xyz')")
tk.MustExec("prepare stmt3 from 'select c from t_index_read where id = ?;'")
tk.MustExec("set @id=1")
// When executing one statement at the first time, we don't use cache, so we need to execute it at least twice to test the cache.
tk.MustQuery("execute stmt3 using @id").Check(testkit.Rows("abc"))
tk.MustQuery("execute stmt3 using @id").Check(testkit.Rows("abc"))
tk.MustExec("set @id=5")
tk.MustQuery("execute stmt3 using @id").Check(testkit.Rows("xyz"))
tk.MustExec("prepare stmt4 from 'select c from t_index_read where id = ? and k = ?'")
tk.MustExec("set @id=1, @k=2")
tk.MustQuery("execute stmt4 using @id, @k").Check(testkit.Rows("abc"))
tk.MustQuery("execute stmt4 using @id, @k").Check(testkit.Rows("abc"))
tk.MustExec("set @id=5, @k=6")
tk.MustQuery("execute stmt4 using @id, @k").Check(testkit.Rows("xyz"))
// Query on range partition tables should not raise error.
tk.MustExec("create table t_range_index (id int, k int, c varchar(10), primary key(id)) partition by range(id) ( PARTITION p0 VALUES LESS THAN (4), PARTITION p1 VALUES LESS THAN (14),PARTITION p2 VALUES LESS THAN (20) )")
tk.MustExec("insert into t_range_index values (1, 2, 'abc'), (5, 4, 'def'), (13, 6, 'xyz'), (17, 6, 'hij')")
tk.MustExec("prepare stmt5 from 'select c from t_range_index where id = ?'")
tk.MustExec("set @id=1")
tk.MustQuery("execute stmt5 using @id").Check(testkit.Rows("abc"))
tk.MustQuery("execute stmt5 using @id").Check(testkit.Rows("abc"))
tk.MustExec("set @id=5")
tk.MustQuery("execute stmt5 using @id").Check(testkit.Rows("def"))
tk.MustQuery("execute stmt5 using @id").Check(testkit.Rows("def"))
tk.MustExec("set @id=13")
tk.MustQuery("execute stmt5 using @id").Check(testkit.Rows("xyz"))
tk.MustExec("set @id=17")
tk.MustQuery("execute stmt5 using @id").Check(testkit.Rows("hij"))
tk.MustExec("create table t_range_table (id int, k int, c varchar(10)) partition by range(id) ( PARTITION p0 VALUES LESS THAN (4), PARTITION p1 VALUES LESS THAN (14),PARTITION p2 VALUES LESS THAN (20) )")
tk.MustExec("insert into t_range_table values (1, 2, 'abc'), (5, 4, 'def'), (13, 6, 'xyz'), (17, 6, 'hij')")
tk.MustExec("prepare stmt6 from 'select c from t_range_table where id = ?'")
tk.MustExec("set @id=1")
tk.MustQuery("execute stmt6 using @id").Check(testkit.Rows("abc"))
tk.MustQuery("execute stmt6 using @id").Check(testkit.Rows("abc"))
tk.MustExec("set @id=5")
tk.MustQuery("execute stmt6 using @id").Check(testkit.Rows("def"))
tk.MustQuery("execute stmt6 using @id").Check(testkit.Rows("def"))
tk.MustExec("set @id=13")
tk.MustQuery("execute stmt6 using @id").Check(testkit.Rows("xyz"))
tk.MustExec("set @id=17")
tk.MustQuery("execute stmt6 using @id").Check(testkit.Rows("hij"))
}
func newSession(c *C, store kv.Storage, dbName string) session.Session {
se, err := session.CreateSession4Test(store)
c.Assert(err, IsNil)
mustExec(c, se, "create database if not exists "+dbName)
mustExec(c, se, "use "+dbName)
return se
}
func mustExec(c *C, se session.Session, sql string) {
_, err := se.Execute(context.Background(), sql)
c.Assert(err, IsNil)
}
func (s *testPrepareSerialSuite) TestConstPropAndPPDWithCache(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
tk.MustExec("use test")
tk.MustExec("drop table if exists t")
tk.MustExec("create table t(a varchar(8) not null, b varchar(8) not null)")
tk.MustExec("insert into t values('1','1')")
tk.MustExec(`prepare stmt from "select count(1) from t t1, t t2 where t1.a = t2.a and t2.b = ? and t2.b = ?"`)
tk.MustExec("set @p0 = '1', @p1 = '2';")
tk.MustQuery("execute stmt using @p0, @p1").Check(testkit.Rows(
"0",
))
tk.MustExec("set @p0 = '1', @p1 = '1'")
tk.MustQuery("execute stmt using @p0, @p1").Check(testkit.Rows(
"1",
))
tk.MustExec(`prepare stmt from "select count(1) from t t1, t t2 where t1.a = t2.a and ?"`)
tk.MustExec("set @p0 = 0")
tk.MustQuery("execute stmt using @p0").Check(testkit.Rows(
"0",
))
tk.MustExec("set @p0 = 1")
tk.MustQuery("execute stmt using @p0").Check(testkit.Rows(
"1",
))
tk.MustExec(`prepare stmt from "select count(1) from t t1, t t2 where ?"`)
tk.MustExec("set @p0 = 0")
tk.MustQuery("execute stmt using @p0").Check(testkit.Rows(
"0",
))
tk.MustExec("set @p0 = 1")
tk.MustQuery("execute stmt using @p0").Check(testkit.Rows(
"1",
))
tk.MustExec(`prepare stmt from "select count(1) from t t1, t t2 where t1.a = t2.a and t2.b = '1' and t2.b = ?"`)
tk.MustExec("set @p0 = '1'")
tk.MustQuery("execute stmt using @p0").Check(testkit.Rows(
"1",
))
tk.MustExec("set @p0 = '2'")
tk.MustQuery("execute stmt using @p0").Check(testkit.Rows(
"0",
))
tk.MustExec(`prepare stmt from "select count(1) from t t1, t t2 where t1.a = t2.a and t1.a > ?"`)
tk.MustExec("set @p0 = '1'")
tk.MustQuery("execute stmt using @p0").Check(testkit.Rows(
"0",
))
tk.MustExec("set @p0 = '0'")
tk.MustQuery("execute stmt using @p0").Check(testkit.Rows(
"1",
))
tk.MustExec(`prepare stmt from "select count(1) from t t1, t t2 where t1.a = t2.a and t1.b > ? and t1.b > ?"`)
tk.MustExec("set @p0 = '0', @p1 = '0'")
tk.MustQuery("execute stmt using @p0,@p1").Check(testkit.Rows(
"1",
))
tk.MustExec("set @p0 = '0', @p1 = '1'")
tk.MustQuery("execute stmt using @p0,@p1").Check(testkit.Rows(
"0",
))
tk.MustExec(`prepare stmt from "select count(1) from t t1, t t2 where t1.a = t2.a and t1.b > ? and t1.b > '1'"`)
tk.MustExec("set @p0 = '1'")
tk.MustQuery("execute stmt using @p0").Check(testkit.Rows(
"0",
))
tk.MustExec("set @p0 = '0'")
tk.MustQuery("execute stmt using @p0").Check(testkit.Rows(
"0",
))
}
func (s *testPlanSerialSuite) TestPlanCacheUnionScan(c *C) {
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
pb := &dto.Metric{}
metrics.ResettablePlanCacheCounterFortTest = true
metrics.PlanCacheCounter.Reset()
counter := metrics.PlanCacheCounter.WithLabelValues("prepare")
tk.MustExec("use test")
tk.MustExec("drop table if exists t1")
tk.MustExec("drop table if exists t2")
tk.MustExec("create table t1(a int not null)")
tk.MustExec("create table t2(a int not null)")
tk.MustExec("prepare stmt1 from 'select * from t1 where a > ?'")
tk.MustExec("set @p0 = 0")
tk.MustQuery("execute stmt1 using @p0").Check(testkit.Rows())
tk.MustExec("begin")
tk.MustQuery("execute stmt1 using @p0").Check(testkit.Rows())
counter.Write(pb)
cnt := pb.GetCounter().GetValue()
c.Check(cnt, Equals, float64(1))
tk.MustExec("insert into t1 values(1)")
// Cached plan is invalid now, it is not chosen and removed.
tk.MustQuery("execute stmt1 using @p0").Check(testkit.Rows(
"1",
))
counter.Write(pb)
cnt = pb.GetCounter().GetValue()
c.Check(cnt, Equals, float64(1))
tk.MustExec("insert into t2 values(1)")
// Cached plan is chosen, modification on t2 does not impact plan of t1.
tk.MustQuery("execute stmt1 using @p0").Check(testkit.Rows(
"1",
))
counter.Write(pb)
cnt = pb.GetCounter().GetValue()
c.Check(cnt, Equals, float64(2))
tk.MustExec("rollback")
// Though cached plan contains UnionScan, it does not impact correctness, so it is reused.
tk.MustQuery("execute stmt1 using @p0").Check(testkit.Rows())
counter.Write(pb)
cnt = pb.GetCounter().GetValue()
c.Check(cnt, Equals, float64(3))
tk.MustExec("prepare stmt2 from 'select * from t1 left join t2 on true where t1.a > ?'")
tk.MustQuery("execute stmt2 using @p0").Check(testkit.Rows())
tk.MustExec("begin")
tk.MustQuery("execute stmt2 using @p0").Check(testkit.Rows())
counter.Write(pb)
cnt = pb.GetCounter().GetValue()
c.Check(cnt, Equals, float64(4))
tk.MustExec("insert into t1 values(1)")
// Cached plan is invalid now, it is not chosen and removed.
tk.MustQuery("execute stmt2 using @p0").Check(testkit.Rows(
"1 <nil>",
))
counter.Write(pb)
cnt = pb.GetCounter().GetValue()
c.Check(cnt, Equals, float64(4))
tk.MustExec("insert into t2 values(1)")
// Cached plan is invalid now, it is not chosen and removed.
tk.MustQuery("execute stmt2 using @p0").Check(testkit.Rows(
"1 1",
))
counter.Write(pb)
cnt = pb.GetCounter().GetValue()
c.Check(cnt, Equals, float64(4))
// Cached plan is reused.
tk.MustQuery("execute stmt2 using @p0").Check(testkit.Rows(
"1 1",
))
counter.Write(pb)
cnt = pb.GetCounter().GetValue()
c.Check(cnt, Equals, float64(5))
tk.MustExec("rollback")
// Though cached plan contains UnionScan, it does not impact correctness, so it is reused.
tk.MustQuery("execute stmt2 using @p0").Check(testkit.Rows())
counter.Write(pb)
cnt = pb.GetCounter().GetValue()
c.Check(cnt, Equals, float64(6))
}
func (s *testPlanSerialSuite) TestPlanCacheHitInfo(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
tk.MustExec("use test")
tk.MustExec("drop table if exists t")
tk.MustExec("create table t(id int)")
tk.MustExec("insert into t values (1),(2),(3),(4)")
tk.MustExec("prepare stmt from 'select * from t where id=?'")
tk.MustExec("prepare stmt2 from 'select /*+ ignore_plan_cache() */ * from t where id=?'")
tk.MustExec("set @doma = 1")
// Test if last_plan_from_cache is appropriately initialized.
tk.MustQuery(`select @@last_plan_from_cache`).Check(testkit.Rows("0"))
tk.MustQuery("execute stmt using @doma").Check(testkit.Rows("1"))
// Test if last_plan_from_cache is updated after a plan cache hit.
tk.MustQuery(`select @@last_plan_from_cache`).Check(testkit.Rows("0"))
tk.MustQuery("execute stmt using @doma").Check(testkit.Rows("1"))
tk.MustQuery(`select @@last_plan_from_cache`).Check(testkit.Rows("1"))
tk.MustQuery("execute stmt2 using @doma").Check(testkit.Rows("1"))
// Test if last_plan_from_cache is updated after a plan cache miss caused by a prepared statement.
tk.MustQuery(`select @@last_plan_from_cache`).Check(testkit.Rows("0"))
// Test if last_plan_from_cache is updated after a plan cache miss caused by a usual statement.
tk.MustQuery("execute stmt using @doma").Check(testkit.Rows("1"))
tk.MustQuery(`select @@last_plan_from_cache`).Check(testkit.Rows("1"))
tk.MustQuery("select * from t where id=1").Check(testkit.Rows("1"))
tk.MustQuery(`select @@last_plan_from_cache`).Check(testkit.Rows("0"))
}
func (s *testPlanSerialSuite) TestPlanCacheUnsignedHandleOverflow(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
tk.MustExec("use test")
tk.MustExec("drop table if exists t")
tk.MustExec("create table t(a bigint unsigned primary key)")
tk.MustExec("insert into t values(18446744073709551615)")
tk.MustExec("prepare stmt from 'select a from t where a=?'")
tk.MustExec("set @p = 1")
tk.MustQuery("execute stmt using @p").Check(testkit.Rows())
tk.MustQuery("select @@last_plan_from_cache").Check(testkit.Rows("0"))
tk.MustQuery("execute stmt using @p").Check(testkit.Rows())
tk.MustQuery("select @@last_plan_from_cache").Check(testkit.Rows("1"))
tk.MustExec("set @p = 18446744073709551615")
tk.MustQuery("execute stmt using @p").Check(testkit.Rows("18446744073709551615"))
tk.MustQuery("select @@last_plan_from_cache").Check(testkit.Rows("0"))
}
func (s *testPlanSerialSuite) TestIssue18066(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
orgEnable := core.PreparedPlanCacheEnabled()
defer func() {
dom.Close()
store.Close()
core.SetPreparedPlanCache(orgEnable)
}()
core.SetPreparedPlanCache(true)
tk.Se, err = session.CreateSession4TestWithOpt(store, &session.Opt{
PreparedPlanCache: kvcache.NewSimpleLRUCache(100, 0.1, math.MaxUint64),
})
c.Assert(err, IsNil)
tk.GetConnectionID()
c.Assert(tk.Se.Auth(&auth.UserIdentity{Username: "root", Hostname: "%"}, nil, nil), IsTrue)
tk.MustExec("use test")
tk.MustExec("drop table if exists t")
tk.MustExec("create table t(a int)")
tk.MustExec("prepare stmt from 'select * from t'")
tk.MustQuery("execute stmt").Check(testkit.Rows())
tk.MustQuery("select EXEC_COUNT,plan_cache_hits, plan_in_cache from information_schema.statements_summary where digest_text='select * from t'").Check(
testkit.Rows("1 0 0"))
tk.MustQuery("execute stmt").Check(testkit.Rows())
tk.MustQuery("select EXEC_COUNT,plan_cache_hits, plan_in_cache from information_schema.statements_summary where digest_text='select * from t'").Check(
testkit.Rows("2 1 1"))
tk.MustExec("prepare stmt from 'select * from t'")
tk.MustQuery("execute stmt").Check(testkit.Rows())
tk.MustQuery("select @@last_plan_from_cache").Check(testkit.Rows("0"))
tk.MustQuery("select EXEC_COUNT,plan_cache_hits, plan_in_cache from information_schema.statements_summary where digest_text='select * from t'").Check(
testkit.Rows("3 1 0"))
}
func (s *testPrepareSuite) TestPrepareForGroupByMultiItems(c *C) {
defer testleak.AfterTest(c)()
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
defer func() {
dom.Close()
store.Close()
}()
tk.MustExec("use test")
tk.MustExec("drop table if exists t")
tk.MustExec("create table t(a int, b int, c int , index idx(a));")
tk.MustExec("insert into t values(1,2, -1), (1,2, 1), (1,2, -1), (4,4,3);")
tk.MustExec("set @a=1")
tk.MustExec("set @b=3")
tk.MustExec(`set sql_mode=""`)
tk.MustExec(`prepare stmt from "select a, sum(b), c from t group by ?, ? order by ?, ?"`)
tk.MustQuery("select a, sum(b), c from t group by 1,3 order by 1,3;").Check(testkit.Rows("1 4 -1", "1 2 1", "4 4 3"))
tk.MustQuery(`execute stmt using @a, @b, @a, @b`).Check(testkit.Rows("1 4 -1", "1 2 1", "4 4 3"))
tk.MustExec("set @c=10")
err = tk.ExecToErr("execute stmt using @a, @c, @a, @c")
c.Assert(err.Error(), Equals, "Unknown column '10' in 'group statement'")
tk.MustExec("set @v1=1.0")
tk.MustExec("set @v2=3.0")
tk.MustExec(`prepare stmt2 from "select sum(b) from t group by ?, ?"`)
tk.MustQuery(`execute stmt2 using @v1, @v2`).Check(testkit.Rows("10"))
}