368 lines
17 KiB
Go
368 lines
17 KiB
Go
// Copyright 2019 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package executor_test
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import (
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"bytes"
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"fmt"
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"strings"
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. "github.com/pingcap/check"
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"github.com/pingcap/parser/auth"
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plannercore "github.com/pingcap/tidb/planner/core"
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"github.com/pingcap/tidb/session"
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"github.com/pingcap/tidb/util/testkit"
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"github.com/pingcap/tidb/util/testutil"
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)
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func (s *testSuite1) TestExplainPrivileges(c *C) {
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se, err := session.CreateSession4Test(s.store)
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c.Assert(err, IsNil)
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c.Assert(se.Auth(&auth.UserIdentity{Username: "root", Hostname: "%"}, nil, nil), IsTrue)
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tk := testkit.NewTestKit(c, s.store)
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tk.Se = se
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tk.MustExec("create database explaindatabase")
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tk.MustExec("use explaindatabase")
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tk.MustExec("create table t (id int)")
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tk.MustExec("create view v as select * from t")
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tk.MustExec(`create user 'explain'@'%'`)
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tk1 := testkit.NewTestKit(c, s.store)
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se, err = session.CreateSession4Test(s.store)
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c.Assert(err, IsNil)
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c.Assert(se.Auth(&auth.UserIdentity{Username: "explain", Hostname: "%"}, nil, nil), IsTrue)
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tk1.Se = se
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tk.MustExec(`grant select on explaindatabase.v to 'explain'@'%'`)
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tk1.MustQuery("show databases").Check(testkit.Rows("INFORMATION_SCHEMA", "explaindatabase"))
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tk1.MustExec("use explaindatabase")
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tk1.MustQuery("select * from v")
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err = tk1.ExecToErr("explain format = 'brief' select * from v")
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c.Assert(err.Error(), Equals, plannercore.ErrViewNoExplain.Error())
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tk.MustExec(`grant show view on explaindatabase.v to 'explain'@'%'`)
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tk1.MustQuery("explain format = 'brief' select * from v")
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tk.MustExec(`revoke select on explaindatabase.v from 'explain'@'%'`)
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err = tk1.ExecToErr("explain format = 'brief' select * from v")
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c.Assert(err.Error(), Equals, plannercore.ErrTableaccessDenied.GenWithStackByArgs("SELECT", "explain", "%", "v").Error())
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}
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func (s *testSuite1) TestExplainCartesianJoin(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t (v int)")
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cases := []struct {
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sql string
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isCartesianJoin bool
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}{
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{"explain format = 'brief' select * from t t1, t t2", true},
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{"explain format = 'brief' select * from t t1 where exists (select 1 from t t2 where t2.v > t1.v)", true},
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{"explain format = 'brief' select * from t t1 where exists (select 1 from t t2 where t2.v in (t1.v+1, t1.v+2))", true},
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{"explain format = 'brief' select * from t t1, t t2 where t1.v = t2.v", false},
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}
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for _, ca := range cases {
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rows := tk.MustQuery(ca.sql).Rows()
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ok := false
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for _, row := range rows {
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str := fmt.Sprintf("%v", row)
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if strings.Contains(str, "CARTESIAN") {
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ok = true
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}
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}
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c.Assert(ok, Equals, ca.isCartesianJoin)
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}
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}
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func (s *testSuite1) TestExplainWrite(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t (a int)")
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tk.MustQuery("explain analyze insert into t select 1")
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tk.MustQuery("select * from t").Check(testkit.Rows("1"))
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tk.MustQuery("explain analyze update t set a=2 where a=1")
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tk.MustQuery("select * from t").Check(testkit.Rows("2"))
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tk.MustQuery("explain format = 'brief' insert into t select 1")
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tk.MustQuery("select * from t").Check(testkit.Rows("2"))
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tk.MustQuery("explain analyze insert into t select 1")
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tk.MustQuery("explain analyze replace into t values (3)")
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tk.MustQuery("select * from t order by a").Check(testkit.Rows("1", "2", "3"))
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}
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func (s *testSuite1) TestExplainAnalyzeMemory(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t (v int, k int, key(k))")
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tk.MustExec("insert into t values (1, 1), (1, 1), (1, 1), (1, 1), (1, 1)")
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s.checkMemoryInfo(c, tk, "explain analyze select * from t order by v")
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s.checkMemoryInfo(c, tk, "explain analyze select * from t order by v limit 5")
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s.checkMemoryInfo(c, tk, "explain analyze select /*+ HASH_JOIN(t1, t2) */ t1.k from t t1, t t2 where t1.v = t2.v+1")
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s.checkMemoryInfo(c, tk, "explain analyze select /*+ MERGE_JOIN(t1, t2) */ t1.k from t t1, t t2 where t1.k = t2.k+1")
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s.checkMemoryInfo(c, tk, "explain analyze select /*+ INL_JOIN(t1, t2) */ t1.k from t t1, t t2 where t1.k = t2.k and t1.v=1")
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s.checkMemoryInfo(c, tk, "explain analyze select /*+ INL_HASH_JOIN(t1, t2) */ t1.k from t t1, t t2 where t1.k = t2.k and t1.v=1")
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s.checkMemoryInfo(c, tk, "explain analyze select /*+ INL_MERGE_JOIN(t1, t2) */ t1.k from t t1, t t2 where t1.k = t2.k and t1.v=1")
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s.checkMemoryInfo(c, tk, "explain analyze select sum(k) from t group by v")
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s.checkMemoryInfo(c, tk, "explain analyze select sum(v) from t group by k")
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s.checkMemoryInfo(c, tk, "explain analyze select * from t")
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s.checkMemoryInfo(c, tk, "explain analyze select k from t use index(k)")
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s.checkMemoryInfo(c, tk, "explain analyze select * from t use index(k)")
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s.checkMemoryInfo(c, tk, "explain analyze select v+k from t")
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}
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func (s *testSuite1) checkMemoryInfo(c *C, tk *testkit.TestKit, sql string) {
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memCol := 6
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ops := []string{"Join", "Reader", "Top", "Sort", "LookUp", "Projection", "Selection", "Agg"}
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rows := tk.MustQuery(sql).Rows()
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for _, row := range rows {
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strs := make([]string, len(row))
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for i, c := range row {
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strs[i] = c.(string)
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}
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if strings.Contains(strs[3], "cop") {
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continue
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}
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shouldHasMem := false
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for _, op := range ops {
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if strings.Contains(strs[0], op) {
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shouldHasMem = true
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break
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}
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}
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if shouldHasMem {
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c.Assert(strs[memCol], Not(Equals), "N/A")
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} else {
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c.Assert(strs[memCol], Equals, "N/A")
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}
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}
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}
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func (s *testSuite1) TestMemoryAndDiskUsageAfterClose(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t (v int, k int, key(k))")
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batch := 128
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limit := tk.Se.GetSessionVars().MaxChunkSize*2 + 10
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var buf bytes.Buffer
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for i := 0; i < limit; {
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buf.Reset()
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_, err := buf.WriteString("insert into t values ")
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c.Assert(err, IsNil)
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for j := 0; j < batch && i < limit; i, j = i+1, j+1 {
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if j > 0 {
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_, err = buf.WriteString(", ")
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c.Assert(err, IsNil)
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}
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_, err = buf.WriteString(fmt.Sprintf("(%v,%v)", i, i))
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c.Assert(err, IsNil)
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}
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tk.MustExec(buf.String())
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}
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SQLs := []string{"select v+abs(k) from t",
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"select v from t where abs(v) > 0",
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"select v from t order by v",
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"select count(v) from t", // StreamAgg
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"select count(v) from t group by v", // HashAgg
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}
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for _, sql := range SQLs {
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tk.MustQuery(sql)
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c.Assert(tk.Se.GetSessionVars().StmtCtx.MemTracker.BytesConsumed(), Equals, int64(0))
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c.Assert(tk.Se.GetSessionVars().StmtCtx.MemTracker.MaxConsumed(), Greater, int64(0))
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c.Assert(tk.Se.GetSessionVars().StmtCtx.DiskTracker.BytesConsumed(), Equals, int64(0))
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}
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}
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func (s *testSuite2) TestExplainAnalyzeExecutionInfo(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t (v int, k int, key(k))")
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tk.MustExec("insert into t values (1, 1), (1, 1), (1, 1), (1, 1), (1, 1)")
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s.checkExecutionInfo(c, tk, "explain analyze select * from t order by v")
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s.checkExecutionInfo(c, tk, "explain analyze select * from t order by v limit 5")
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s.checkExecutionInfo(c, tk, "explain analyze select /*+ HASH_JOIN(t1, t2) */ t1.k from t t1, t t2 where t1.v = t2.v+1")
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s.checkExecutionInfo(c, tk, "explain analyze select /*+ MERGE_JOIN(t1, t2) */ t1.k from t t1, t t2 where t1.k = t2.k+1")
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s.checkExecutionInfo(c, tk, "explain analyze select /*+ INL_JOIN(t1, t2) */ t1.k from t t1, t t2 where t1.k = t2.k and t1.v=1")
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s.checkExecutionInfo(c, tk, "explain analyze select /*+ INL_HASH_JOIN(t1, t2) */ t1.k from t t1, t t2 where t1.k = t2.k and t1.v=1")
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s.checkExecutionInfo(c, tk, "explain analyze select /*+ INL_MERGE_JOIN(t1, t2) */ t1.k from t t1, t t2 where t1.k = t2.k and t1.v=1")
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s.checkExecutionInfo(c, tk, "explain analyze select sum(k) from t group by v")
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s.checkExecutionInfo(c, tk, "explain analyze select sum(v) from t group by k")
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s.checkExecutionInfo(c, tk, "explain analyze select * from t")
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s.checkExecutionInfo(c, tk, "explain analyze select k from t use index(k)")
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s.checkExecutionInfo(c, tk, "explain analyze select * from t use index(k)")
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s.checkExecutionInfo(c, tk, "explain analyze with recursive cte(a) as (select 1 union select a + 1 from cte where a < 1000) select * from cte;")
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tk.MustExec("CREATE TABLE IF NOT EXISTS nation ( N_NATIONKEY BIGINT NOT NULL,N_NAME CHAR(25) NOT NULL,N_REGIONKEY BIGINT NOT NULL,N_COMMENT VARCHAR(152),PRIMARY KEY (N_NATIONKEY));")
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tk.MustExec("CREATE TABLE IF NOT EXISTS part ( P_PARTKEY BIGINT NOT NULL,P_NAME VARCHAR(55) NOT NULL,P_MFGR CHAR(25) NOT NULL,P_BRAND CHAR(10) NOT NULL,P_TYPE VARCHAR(25) NOT NULL,P_SIZE BIGINT NOT NULL,P_CONTAINER CHAR(10) NOT NULL,P_RETAILPRICE DECIMAL(15,2) NOT NULL,P_COMMENT VARCHAR(23) NOT NULL,PRIMARY KEY (P_PARTKEY));")
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tk.MustExec("CREATE TABLE IF NOT EXISTS supplier ( S_SUPPKEY BIGINT NOT NULL,S_NAME CHAR(25) NOT NULL,S_ADDRESS VARCHAR(40) NOT NULL,S_NATIONKEY BIGINT NOT NULL,S_PHONE CHAR(15) NOT NULL,S_ACCTBAL DECIMAL(15,2) NOT NULL,S_COMMENT VARCHAR(101) NOT NULL,PRIMARY KEY (S_SUPPKEY),CONSTRAINT FOREIGN KEY SUPPLIER_FK1 (S_NATIONKEY) references nation(N_NATIONKEY));")
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tk.MustExec("CREATE TABLE IF NOT EXISTS partsupp ( PS_PARTKEY BIGINT NOT NULL,PS_SUPPKEY BIGINT NOT NULL,PS_AVAILQTY BIGINT NOT NULL,PS_SUPPLYCOST DECIMAL(15,2) NOT NULL,PS_COMMENT VARCHAR(199) NOT NULL,PRIMARY KEY (PS_PARTKEY,PS_SUPPKEY),CONSTRAINT FOREIGN KEY PARTSUPP_FK1 (PS_SUPPKEY) references supplier(S_SUPPKEY),CONSTRAINT FOREIGN KEY PARTSUPP_FK2 (PS_PARTKEY) references part(P_PARTKEY));")
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tk.MustExec("CREATE TABLE IF NOT EXISTS orders ( O_ORDERKEY BIGINT NOT NULL,O_CUSTKEY BIGINT NOT NULL,O_ORDERSTATUS CHAR(1) NOT NULL,O_TOTALPRICE DECIMAL(15,2) NOT NULL,O_ORDERDATE DATE NOT NULL,O_ORDERPRIORITY CHAR(15) NOT NULL,O_CLERK CHAR(15) NOT NULL,O_SHIPPRIORITY BIGINT NOT NULL,O_COMMENT VARCHAR(79) NOT NULL,PRIMARY KEY (O_ORDERKEY),CONSTRAINT FOREIGN KEY ORDERS_FK1 (O_CUSTKEY) references customer(C_CUSTKEY));")
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tk.MustExec("CREATE TABLE IF NOT EXISTS lineitem ( L_ORDERKEY BIGINT NOT NULL,L_PARTKEY BIGINT NOT NULL,L_SUPPKEY BIGINT NOT NULL,L_LINENUMBER BIGINT NOT NULL,L_QUANTITY DECIMAL(15,2) NOT NULL,L_EXTENDEDPRICE DECIMAL(15,2) NOT NULL,L_DISCOUNT DECIMAL(15,2) NOT NULL,L_TAX DECIMAL(15,2) NOT NULL,L_RETURNFLAG CHAR(1) NOT NULL,L_LINESTATUS CHAR(1) NOT NULL,L_SHIPDATE DATE NOT NULL,L_COMMITDATE DATE NOT NULL,L_RECEIPTDATE DATE NOT NULL,L_SHIPINSTRUCT CHAR(25) NOT NULL,L_SHIPMODE CHAR(10) NOT NULL,L_COMMENT VARCHAR(44) NOT NULL,PRIMARY KEY (L_ORDERKEY,L_LINENUMBER),CONSTRAINT FOREIGN KEY LINEITEM_FK1 (L_ORDERKEY) references orders(O_ORDERKEY),CONSTRAINT FOREIGN KEY LINEITEM_FK2 (L_PARTKEY,L_SUPPKEY) references partsupp(PS_PARTKEY, PS_SUPPKEY));")
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s.checkExecutionInfo(c, tk, "select nation, o_year, sum(amount) as sum_profit from ( select n_name as nation, extract(year from o_orderdate) as o_year, l_extendedprice * (1 - l_discount) - ps_supplycost * l_quantity as amount from part, supplier, lineitem, partsupp, orders, nation where s_suppkey = l_suppkey and ps_suppkey = l_suppkey and ps_partkey = l_partkey and p_partkey = l_partkey and o_orderkey = l_orderkey and s_nationkey = n_nationkey and p_name like '%dim%' ) as profit group by nation, o_year order by nation, o_year desc;")
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tk.MustExec("drop table if exists nation")
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tk.MustExec("drop table if exists part")
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tk.MustExec("drop table if exists supplier")
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tk.MustExec("drop table if exists partsupp")
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tk.MustExec("drop table if exists orders")
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tk.MustExec("drop table if exists lineitem")
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}
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func (s *testSuite2) checkExecutionInfo(c *C, tk *testkit.TestKit, sql string) {
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executionInfoCol := 4
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rows := tk.MustQuery(sql).Rows()
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for _, row := range rows {
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strs := make([]string, len(row))
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for i, c := range row {
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strs[i] = c.(string)
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}
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c.Assert(strs[executionInfoCol], Not(Equals), "time:0s, loops:0, rows:0")
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}
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}
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func (s *testSuite2) TestExplainAnalyzeActRowsNotEmpty(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t (a int, b int, index (a))")
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tk.MustExec("insert into t values (1, 1)")
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s.checkActRowsNotEmpty(c, tk, "explain analyze select * from t t1, t t2 where t1.b = t2.a and t1.b = 2333")
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}
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func (s *testSuite2) checkActRowsNotEmpty(c *C, tk *testkit.TestKit, sql string) {
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actRowsCol := 2
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rows := tk.MustQuery(sql).Rows()
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for _, row := range rows {
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strs := make([]string, len(row))
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for i, c := range row {
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strs[i] = c.(string)
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}
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c.Assert(strs[actRowsCol], Not(Equals), "")
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}
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}
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func checkActRows(c *C, tk *testkit.TestKit, sql string, expected []string) {
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actRowsCol := 2
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rows := tk.MustQuery("explain analyze " + sql).Rows()
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c.Assert(len(rows), Equals, len(expected))
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for id, row := range rows {
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strs := make([]string, len(row))
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for i, c := range row {
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strs[i] = c.(string)
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}
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c.Assert(strs[actRowsCol], Equals, expected[id])
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}
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}
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func (s *testSuite1) TestCheckActRowsWithUnistore(c *C) {
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// testSuite1 use default mockstore which is unistore
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("drop table if exists t_unistore_act_rows")
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tk.MustExec("create table t_unistore_act_rows(a int, b int, index(a, b))")
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tk.MustExec("insert into t_unistore_act_rows values (1, 0), (1, 0), (2, 0), (2, 1)")
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tk.MustExec("analyze table t_unistore_act_rows")
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type testStruct struct {
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sql string
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expected []string
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}
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tests := []testStruct{
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{
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sql: "select * from t_unistore_act_rows",
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expected: []string{"4", "4"},
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},
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{
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sql: "select * from t_unistore_act_rows where a > 1",
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expected: []string{"2", "2"},
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},
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{
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sql: "select * from t_unistore_act_rows where a > 1 and b > 0",
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expected: []string{"1", "1", "2"},
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},
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{
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sql: "select b from t_unistore_act_rows",
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expected: []string{"4", "4"},
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},
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{
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sql: "select * from t_unistore_act_rows where b > 0",
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expected: []string{"1", "1", "4"},
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},
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{
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sql: "select count(*) from t_unistore_act_rows",
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expected: []string{"1", "1", "1", "4"},
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},
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{
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sql: "select count(*) from t_unistore_act_rows group by a",
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expected: []string{"2", "2", "2", "4"},
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},
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{
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sql: "select count(*) from t_unistore_act_rows group by b",
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expected: []string{"2", "2", "2", "4"},
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},
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{
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sql: "with cte(a) as (select a from t_unistore_act_rows) select (select 1 from cte limit 1) from cte;",
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expected: []string{"4", "4", "4", "4", "4"},
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},
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}
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for _, test := range tests {
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checkActRows(c, tk, test.sql, test.expected)
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}
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}
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func (s *testSuite2) TestExplainAnalyzeCTEMemoryAndDiskInfo(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("drop table if exists t")
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tk.MustExec("create table t (a int)")
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tk.MustExec("insert into t with recursive cte(a) as (select 1 union select a + 1 from cte where a < 1000) select * from cte;")
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rows := tk.MustQuery("explain analyze with recursive cte(a) as (select 1 union select a + 1 from cte where a < 1000)" +
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" select * from cte, t;").Rows()
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c.Assert(rows[4][7].(string), Not(Equals), "N/A")
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c.Assert(rows[4][8].(string), Equals, "0 Bytes")
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tk.MustExec("set @@tidb_mem_quota_query=10240;")
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rows = tk.MustQuery("explain analyze with recursive cte(a) as (select 1 union select a + 1 from cte where a < 1000)" +
|
|
" select * from cte, t;").Rows()
|
|
|
|
c.Assert(rows[4][7].(string), Not(Equals), "N/A")
|
|
c.Assert(rows[4][8].(string), Not(Equals), "N/A")
|
|
}
|
|
|
|
func (s *testSuite) TestExplainStatementsSummary(c *C) {
|
|
tk := testkit.NewTestKitWithInit(c, s.store)
|
|
tk.MustQuery("desc select * from information_schema.statements_summary").Check(testkit.Rows(
|
|
`MemTableScan_4 10000.00 root table:STATEMENTS_SUMMARY `))
|
|
tk.MustQuery("desc select * from information_schema.statements_summary where digest is null").Check(testutil.RowsWithSep("|",
|
|
`Selection_5|8000.00|root| isnull(Column#5)`, `└─MemTableScan_6|10000.00|root|table:STATEMENTS_SUMMARY|`))
|
|
tk.MustQuery("desc select * from information_schema.statements_summary where digest = 'abcdefg'").Check(testutil.RowsWithSep(" ",
|
|
`MemTableScan_5 10000.00 root table:STATEMENTS_SUMMARY digests: ["abcdefg"]`))
|
|
tk.MustQuery("desc select * from information_schema.statements_summary where digest in ('a','b','c')").Check(testutil.RowsWithSep(" ",
|
|
`MemTableScan_5 10000.00 root table:STATEMENTS_SUMMARY digests: ["a","b","c"]`))
|
|
}
|