126 lines
4.6 KiB
Go
126 lines
4.6 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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// 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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"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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)
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func (s *testSuite1) TestExplainPriviliges(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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tk.MustExec(`flush privileges`)
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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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tk.MustExec(`flush privileges`)
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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 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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tk.MustExec(`flush privileges`)
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tk1.MustQuery("explain select * from v")
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tk.MustExec(`revoke select on explaindatabase.v from 'explain'@'%'`)
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tk.MustExec(`flush privileges`)
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err = tk1.ExecToErr("explain 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) 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.MustExec("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.MustExec("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.MustExec("explain insert into t select 1")
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tk.MustQuery("select * from t").Check(testkit.Rows("2"))
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tk.MustExec("explain analyze insert into t select 1")
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tk.MustQuery("select * from t order by a").Check(testkit.Rows("1", "2"))
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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 /*+ TIDB_HJ(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 /*+ TIDB_SMJ(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 /*+ TIDB_INLJ(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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}
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func (s *testSuite1) checkMemoryInfo(c *C, tk *testkit.TestKit, sql string) {
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memCol := 5
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ops := []string{"Join", "Reader", "Top", "Sort", "LookUp"}
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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[2], "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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