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set_test.go
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// Copyright 2016 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 executor_test
import (
. "github.com/pingcap/check"
"github.com/pingcap/tidb/context"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/sessionctx/varsutil"
"github.com/pingcap/tidb/util/testkit"
)
func (s *testSuite) TestSetVar(c *C) {
tk := testkit.NewTestKit(c, s.store)
testSQL := "SET @a = 1;"
tk.MustExec(testSQL)
testSQL = `SET @a = "1";`
tk.MustExec(testSQL)
testSQL = "SET @a = null;"
tk.MustExec(testSQL)
testSQL = "SET @@global.autocommit = 1;"
tk.MustExec(testSQL)
// TODO: this test case should returns error.
// testSQL = "SET @@global.autocommit = null;"
// _, err := tk.Exec(testSQL)
// c.Assert(err, NotNil)
testSQL = "SET @@autocommit = 1;"
tk.MustExec(testSQL)
testSQL = "SET @@autocommit = null;"
_, err := tk.Exec(testSQL)
c.Assert(err, NotNil)
errTestSql := "SET @@date_format = 1;"
_, err = tk.Exec(errTestSql)
c.Assert(err, NotNil)
errTestSql = "SET @@rewriter_enabled = 1;"
_, err = tk.Exec(errTestSql)
c.Assert(err, NotNil)
errTestSql = "SET xxx = abcd;"
_, err = tk.Exec(errTestSql)
c.Assert(err, NotNil)
errTestSql = "SET @@global.a = 1;"
_, err = tk.Exec(errTestSql)
c.Assert(err, NotNil)
errTestSql = "SET @@global.timestamp = 1;"
_, err = tk.Exec(errTestSql)
c.Assert(err, NotNil)
// For issue 998
testSQL = "SET @issue998a=1, @issue998b=5;"
tk.MustExec(testSQL)
tk.MustQuery(`select @issue998a, @issue998b;`).Check(testkit.Rows("1 5"))
testSQL = "SET @@autocommit=0, @issue998a=2;"
tk.MustExec(testSQL)
tk.MustQuery(`select @issue998a, @@autocommit;`).Check(testkit.Rows("2 0"))
testSQL = "SET @@global.autocommit=1, @issue998b=6;"
tk.MustExec(testSQL)
tk.MustQuery(`select @issue998b, @@global.autocommit;`).Check(testkit.Rows("6 1"))
// For issue 4302
testSQL = "use test;drop table if exists x;create table x(a int);insert into x value(1);"
tk.MustExec(testSQL)
testSQL = "SET @issue4302=(select a from x limit 1);"
tk.MustExec(testSQL)
tk.MustQuery(`select @issue4302;`).Check(testkit.Rows("1"))
// Set default
// {ScopeGlobal | ScopeSession, "low_priority_updates", "OFF"},
// For global var
tk.MustQuery(`select @@global.low_priority_updates;`).Check(testkit.Rows("OFF"))
tk.MustExec(`set @@global.low_priority_updates="ON";`)
tk.MustQuery(`select @@global.low_priority_updates;`).Check(testkit.Rows("ON"))
tk.MustExec(`set @@global.low_priority_updates=DEFAULT;`) // It will be set to compiled-in default value.
tk.MustQuery(`select @@global.low_priority_updates;`).Check(testkit.Rows("OFF"))
// For session
tk.MustQuery(`select @@session.low_priority_updates;`).Check(testkit.Rows("OFF"))
tk.MustExec(`set @@global.low_priority_updates="ON";`)
tk.MustExec(`set @@session.low_priority_updates=DEFAULT;`) // It will be set to global var value.
tk.MustQuery(`select @@session.low_priority_updates;`).Check(testkit.Rows("ON"))
// For mysql jdbc driver issue.
tk.MustQuery(`select @@session.tx_read_only;`).Check(testkit.Rows("0"))
// Test session variable states.
vars := tk.Se.(context.Context).GetSessionVars()
tk.Se.CommitTxn()
tk.MustExec("set @@autocommit = 1")
c.Assert(vars.InTxn(), IsFalse)
c.Assert(vars.IsAutocommit(), IsTrue)
tk.MustExec("set @@autocommit = 0")
c.Assert(vars.IsAutocommit(), IsFalse)
tk.MustExec("set @@sql_mode = 'strict_trans_tables'")
c.Assert(vars.StrictSQLMode, IsTrue)
tk.MustExec("set @@sql_mode = ''")
c.Assert(vars.StrictSQLMode, IsFalse)
tk.MustExec("set names utf8")
charset, collation := vars.GetCharsetInfo()
c.Assert(charset, Equals, "utf8")
c.Assert(collation, Equals, "utf8_bin")
tk.MustExec("set @@character_set_results = NULL")
c.Assert(vars.SkipConstraintCheck, IsFalse)
tk.MustExec("set @@tidb_skip_constraint_check = '1'")
c.Assert(vars.SkipConstraintCheck, IsTrue)
tk.MustExec("set @@tidb_skip_constraint_check = '0'")
c.Assert(vars.SkipConstraintCheck, IsFalse)
// Test set transaction isolation level, which is equivalent to setting variable "tx_isolation".
tk.MustExec("SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED")
tk.MustQuery("select @@session.tx_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustExec("SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED")
tk.MustQuery("select @@session.tx_isolation").Check(testkit.Rows("READ-UNCOMMITTED"))
tk.MustExec("SET GLOBAL TRANSACTION ISOLATION LEVEL SERIALIZABLE")
tk.MustQuery("select @@global.tx_isolation").Check(testkit.Rows("SERIALIZABLE"))
// Even the transaction fail, set session variable would success.
tk.MustExec("BEGIN")
tk.MustExec("SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED")
_, err = tk.Se.Execute(`INSERT INTO t VALUES ("sdfsdf")`)
c.Assert(err, NotNil)
tk.MustExec("COMMIT")
tk.MustQuery("select @@session.tx_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustExec("set global avoid_temporal_upgrade = on")
tk.MustQuery(`select @@global.avoid_temporal_upgrade;`).Check(testkit.Rows("ON"))
tk.MustExec("set @@global.avoid_temporal_upgrade = off")
tk.MustQuery(`select @@global.avoid_temporal_upgrade;`).Check(testkit.Rows("off"))
tk.MustExec("set session sql_log_bin = on")
tk.MustQuery(`select @@session.sql_log_bin;`).Check(testkit.Rows("ON"))
tk.MustExec("set sql_log_bin = off")
tk.MustQuery(`select @@session.sql_log_bin;`).Check(testkit.Rows("off"))
tk.MustExec("set @@sql_log_bin = on")
tk.MustQuery(`select @@session.sql_log_bin;`).Check(testkit.Rows("ON"))
}
func (s *testSuite) TestSetCharset(c *C) {
tk := testkit.NewTestKit(c, s.store)
tk.MustExec(`SET NAMES latin1`)
ctx := tk.Se.(context.Context)
sessionVars := ctx.GetSessionVars()
for _, v := range variable.SetNamesVariables {
sVar, err := varsutil.GetSessionSystemVar(sessionVars, v)
c.Assert(err, IsNil)
c.Assert(sVar != "utf8", IsTrue)
}
tk.MustExec(`SET NAMES utf8`)
for _, v := range variable.SetNamesVariables {
sVar, err := varsutil.GetSessionSystemVar(sessionVars, v)
c.Assert(err, IsNil)
c.Assert(sVar, Equals, "utf8")
}
sVar, err := varsutil.GetSessionSystemVar(sessionVars, variable.CollationConnection)
c.Assert(err, IsNil)
c.Assert(sVar, Equals, "utf8_bin")
// Issue 1523
tk.MustExec(`SET NAMES binary`)
}