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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,
// 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 executor_test
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"strconv"
"testing"
"github.com/pingcap/failpoint"
"github.com/pingcap/tidb/config"
"github.com/pingcap/tidb/errno"
"github.com/pingcap/tidb/executor"
"github.com/pingcap/tidb/expression"
"github.com/pingcap/tidb/infoschema"
"github.com/pingcap/tidb/parser/mysql"
"github.com/pingcap/tidb/parser/terror"
"github.com/pingcap/tidb/sessionctx"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/testkit"
"github.com/pingcap/tidb/types"
"github.com/pingcap/tidb/util/mock"
topsqlstate "github.com/pingcap/tidb/util/topsql/state"
"github.com/stretchr/testify/require"
)
func TestSetVar(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("SET @a = 1;")
tk.MustExec(`SET @a = "1";`)
tk.MustExec("SET @a = null;")
tk.MustExec("SET @@global.autocommit = 1;")
// TODO: this test case should returns error.
// err := tk.ExecToErr("SET @@global.autocommit = null;")
// c.Assert(err, NotNil)
tk.MustExec("SET @@autocommit = 1;")
require.Error(t, tk.ExecToErr("SET @@autocommit = null;"))
require.Error(t, tk.ExecToErr("SET @@date_format = 1;"))
require.Error(t, tk.ExecToErr("SET @@rewriter_enabled = 1;"))
require.Error(t, tk.ExecToErr("SET xxx = abcd;"))
require.Error(t, tk.ExecToErr("SET @@global.a = 1;"))
require.Error(t, tk.ExecToErr("SET @@global.timestamp = 1;"))
// For issue 998
tk.MustExec("SET @issue998a=1, @issue998b=5;")
tk.MustQuery(`select @issue998a, @issue998b;`).Check(testkit.Rows("1 5"))
tk.MustExec("SET @@autocommit=0, @issue998a=2;")
tk.MustQuery(`select @issue998a, @@autocommit;`).Check(testkit.Rows("2 0"))
tk.MustExec("SET @@global.autocommit=1, @issue998b=6;")
tk.MustQuery(`select @issue998b, @@global.autocommit;`).Check(testkit.Rows("6 1"))
// For issue 4302
tk.MustExec("use test;drop table if exists x;create table x(a int);insert into x value(1);")
tk.MustExec("SET @issue4302=(select a from x limit 1);")
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("0"))
tk.MustExec(`set @@global.low_priority_updates="ON";`)
tk.MustQuery(`select @@global.low_priority_updates;`).Check(testkit.Rows("1"))
tk.MustExec(`set @@global.low_priority_updates=DEFAULT;`) // It will be set to default var value.
tk.MustQuery(`select @@global.low_priority_updates;`).Check(testkit.Rows("0"))
// For session
tk.MustQuery(`select @@session.low_priority_updates;`).Check(testkit.Rows("0"))
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("1"))
// For mysql jdbc driver issue.
tk.MustQuery(`select @@session.tx_read_only;`).Check(testkit.Rows("0"))
// Test session variable states.
vars := tk.Session().(sessionctx.Context).GetSessionVars()
require.NoError(t, tk.Session().CommitTxn(context.TODO()))
tk.MustExec("set @@autocommit = 1")
require.False(t, vars.InTxn())
require.True(t, vars.IsAutocommit())
tk.MustExec("set @@autocommit = 0")
require.False(t, vars.IsAutocommit())
tk.MustExec("set @@sql_mode = 'strict_trans_tables'")
require.True(t, vars.StrictSQLMode)
tk.MustExec("set @@sql_mode = ''")
require.False(t, vars.StrictSQLMode)
tk.MustExec("set names utf8")
charset, collation := vars.GetCharsetInfo()
require.Equal(t, "utf8", charset)
require.Equal(t, "utf8_bin", collation)
tk.MustExec("set names latin1 collate latin1_bin")
charset, collation = vars.GetCharsetInfo()
require.Equal(t, "latin1", charset)
require.Equal(t, "latin1_bin", collation)
tk.MustExec("set names utf8 collate default")
charset, collation = vars.GetCharsetInfo()
require.Equal(t, "utf8", charset)
require.Equal(t, "utf8_bin", collation)
expectErrMsg := "[ddl:1273]Unknown collation: 'non_exist_collation'"
tk.MustGetErrMsg("set names utf8 collate non_exist_collation", expectErrMsg)
tk.MustGetErrMsg("set @@session.collation_server='non_exist_collation'", expectErrMsg)
tk.MustGetErrMsg("set @@session.collation_database='non_exist_collation'", expectErrMsg)
tk.MustGetErrMsg("set @@session.collation_connection='non_exist_collation'", expectErrMsg)
tk.MustGetErrMsg("set @@global.collation_server='non_exist_collation'", expectErrMsg)
tk.MustGetErrMsg("set @@global.collation_database='non_exist_collation'", expectErrMsg)
tk.MustGetErrMsg("set @@global.collation_connection='non_exist_collation'", expectErrMsg)
expectErrMsg = "[parser:1115]Unknown character set: 'boguscharsetname'"
tk.MustGetErrMsg("set names boguscharsetname", expectErrMsg)
tk.MustExec("set character_set_results = NULL")
tk.MustQuery("select @@character_set_results").Check(testkit.Rows(""))
tk.MustExec("set @@global.ddl_slow_threshold=12345")
tk.MustQuery("select @@global.ddl_slow_threshold").Check(testkit.Rows("12345"))
require.Equal(t, uint32(12345), variable.DDLSlowOprThreshold)
tk.MustExec("set session ddl_slow_threshold=\"54321\"")
tk.MustQuery("show variables like 'ddl_slow_threshold'").Check(testkit.Rows("ddl_slow_threshold 54321"))
require.Equal(t, uint32(54321), variable.DDLSlowOprThreshold)
tk.MustExec("set @@global.ddl_slow_threshold=-1")
tk.MustQuery("select @@global.ddl_slow_threshold").Check(testkit.Rows(strconv.Itoa(variable.DefTiDBDDLSlowOprThreshold)))
require.Equal(t, uint32(variable.DefTiDBDDLSlowOprThreshold), variable.DDLSlowOprThreshold)
require.Error(t, tk.ExecToErr("set @@global.ddl_slow_threshold=abc"))
tk.MustQuery("select @@global.ddl_slow_threshold").Check(testkit.Rows(strconv.Itoa(variable.DefTiDBDDLSlowOprThreshold)))
require.Equal(t, uint32(variable.DefTiDBDDLSlowOprThreshold), variable.DDLSlowOprThreshold)
// 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.MustQuery("select @@session.transaction_isolation").Check(testkit.Rows("READ-COMMITTED"))
// error
err := tk.ExecToErr("SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED")
require.True(t, terror.ErrorEqual(err, variable.ErrUnsupportedIsolationLevel), fmt.Sprintf("err %v", err))
tk.MustQuery("select @@session.tx_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustQuery("select @@session.transaction_isolation").Check(testkit.Rows("READ-COMMITTED"))
// Fails
err = tk.ExecToErr("SET GLOBAL TRANSACTION ISOLATION LEVEL SERIALIZABLE")
require.True(t, terror.ErrorEqual(err, variable.ErrUnsupportedIsolationLevel), fmt.Sprintf("err %v", err))
tk.MustQuery("select @@global.tx_isolation").Check(testkit.Rows("REPEATABLE-READ"))
tk.MustQuery("select @@global.transaction_isolation").Check(testkit.Rows("REPEATABLE-READ"))
// test synonyms variables
tk.MustExec("SET SESSION tx_isolation = 'READ-COMMITTED'")
tk.MustQuery("select @@session.tx_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustQuery("select @@session.transaction_isolation").Check(testkit.Rows("READ-COMMITTED"))
err = tk.ExecToErr("SET SESSION tx_isolation = 'READ-UNCOMMITTED'")
require.True(t, terror.ErrorEqual(err, variable.ErrUnsupportedIsolationLevel), fmt.Sprintf("err %v", err))
tk.MustQuery("select @@session.tx_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustQuery("select @@session.transaction_isolation").Check(testkit.Rows("READ-COMMITTED"))
// fails
err = tk.ExecToErr("SET SESSION transaction_isolation = 'SERIALIZABLE'")
require.True(t, terror.ErrorEqual(err, variable.ErrUnsupportedIsolationLevel), fmt.Sprintf("err %v", err))
tk.MustQuery("select @@session.tx_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustQuery("select @@session.transaction_isolation").Check(testkit.Rows("READ-COMMITTED"))
// fails
err = tk.ExecToErr("SET GLOBAL transaction_isolation = 'SERIALIZABLE'")
require.True(t, terror.ErrorEqual(err, variable.ErrUnsupportedIsolationLevel), fmt.Sprintf("err %v", err))
tk.MustQuery("select @@global.tx_isolation").Check(testkit.Rows("REPEATABLE-READ"))
tk.MustQuery("select @@global.transaction_isolation").Check(testkit.Rows("REPEATABLE-READ"))
err = tk.ExecToErr("SET GLOBAL transaction_isolation = 'READ-UNCOMMITTED'")
require.True(t, terror.ErrorEqual(err, variable.ErrUnsupportedIsolationLevel), fmt.Sprintf("err %v", err))
tk.MustQuery("select @@global.tx_isolation").Check(testkit.Rows("REPEATABLE-READ"))
tk.MustQuery("select @@global.transaction_isolation").Check(testkit.Rows("REPEATABLE-READ"))
err = tk.ExecToErr("SET GLOBAL tx_isolation = 'SERIALIZABLE'")
require.True(t, terror.ErrorEqual(err, variable.ErrUnsupportedIsolationLevel), fmt.Sprintf("err %v", err))
tk.MustQuery("select @@global.tx_isolation").Check(testkit.Rows("REPEATABLE-READ"))
tk.MustQuery("select @@global.transaction_isolation").Check(testkit.Rows("REPEATABLE-READ"))
// Even the transaction fail, set session variable would success.
tk.MustExec("BEGIN")
tk.MustExec("SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED")
require.Error(t, tk.ExecToErr(`INSERT INTO t VALUES ("sdfsdf")`))
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("1"))
tk.MustExec("set @@global.avoid_temporal_upgrade = off")
tk.MustQuery(`select @@global.avoid_temporal_upgrade;`).Check(testkit.Rows("0"))
tk.MustExec("set session sql_log_bin = on")
tk.MustQuery(`select @@session.sql_log_bin;`).Check(testkit.Rows("1"))
tk.MustExec("set sql_log_bin = off")
tk.MustQuery(`select @@session.sql_log_bin;`).Check(testkit.Rows("0"))
tk.MustExec("set @@sql_log_bin = on")
tk.MustQuery(`select @@session.sql_log_bin;`).Check(testkit.Rows("1"))
binlogValue := "0"
if config.GetGlobalConfig().Binlog.Enable {
binlogValue = "1"
}
tk.MustQuery(`select @@global.log_bin;`).Check(testkit.Rows(binlogValue))
tk.MustQuery(`select @@log_bin;`).Check(testkit.Rows(binlogValue))
tk.MustExec("set @@tidb_general_log = 1")
tk.MustExec("set @@tidb_general_log = 0")
tk.MustExec("set @@tidb_pprof_sql_cpu = 1")
tk.MustExec("set @@tidb_pprof_sql_cpu = 0")
tk.MustExec(`set @@block_encryption_mode = "aes-128-ecb"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-128-ecb"))
tk.MustExec(`set @@block_encryption_mode = "aes-192-ecb"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-192-ecb"))
tk.MustExec(`set @@block_encryption_mode = "aes-256-ecb"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-256-ecb"))
tk.MustExec(`set @@block_encryption_mode = "aes-128-cbc"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-128-cbc"))
tk.MustExec(`set @@block_encryption_mode = "aes-192-cbc"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-192-cbc"))
tk.MustExec(`set @@block_encryption_mode = "aes-256-cbc"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-256-cbc"))
tk.MustExec(`set @@block_encryption_mode = "aes-128-ofb"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-128-ofb"))
tk.MustExec(`set @@block_encryption_mode = "aes-192-ofb"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-192-ofb"))
tk.MustExec(`set @@block_encryption_mode = "aes-256-ofb"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-256-ofb"))
tk.MustExec(`set @@block_encryption_mode = "aes-128-cfb"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-128-cfb"))
tk.MustExec(`set @@block_encryption_mode = "aes-192-cfb"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-192-cfb"))
tk.MustExec(`set @@block_encryption_mode = "aes-256-cfb"`)
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-256-cfb"))
require.Error(t, tk.ExecToErr("set @@block_encryption_mode = 'abc'"))
tk.MustQuery(`select @@block_encryption_mode;`).Check(testkit.Rows("aes-256-cfb"))
tk.MustExec(`set @@global.tidb_force_priority = "no_priority"`)
tk.MustQuery(`select @@global.tidb_force_priority;`).Check(testkit.Rows("NO_PRIORITY"))
tk.MustExec(`set @@global.tidb_force_priority = "low_priority"`)
tk.MustQuery(`select @@global.tidb_force_priority;`).Check(testkit.Rows("LOW_PRIORITY"))
tk.MustExec(`set @@global.tidb_force_priority = "high_priority"`)
tk.MustQuery(`select @@global.tidb_force_priority;`).Check(testkit.Rows("HIGH_PRIORITY"))
tk.MustExec(`set @@global.tidb_force_priority = "delayed"`)
tk.MustQuery(`select @@global.tidb_force_priority;`).Check(testkit.Rows("DELAYED"))
require.Error(t, tk.ExecToErr("set global tidb_force_priority = 'abc'"))
tk.MustQuery(`select @@global.tidb_force_priority;`).Check(testkit.Rows("DELAYED"))
tk.MustExec(`set @@session.tidb_ddl_reorg_priority = "priority_low"`)
tk.MustQuery(`select @@session.tidb_ddl_reorg_priority;`).Check(testkit.Rows("PRIORITY_LOW"))
tk.MustExec(`set @@session.tidb_ddl_reorg_priority = "priority_normal"`)
tk.MustQuery(`select @@session.tidb_ddl_reorg_priority;`).Check(testkit.Rows("PRIORITY_NORMAL"))
tk.MustExec(`set @@session.tidb_ddl_reorg_priority = "priority_high"`)
tk.MustQuery(`select @@session.tidb_ddl_reorg_priority;`).Check(testkit.Rows("PRIORITY_HIGH"))
require.Error(t, tk.ExecToErr("set session tidb_ddl_reorg_priority = 'abc'"))
tk.MustQuery(`select @@session.tidb_ddl_reorg_priority;`).Check(testkit.Rows("PRIORITY_HIGH"))
tk.MustExec("set tidb_opt_write_row_id = 1")
tk.MustQuery(`select @@session.tidb_opt_write_row_id;`).Check(testkit.Rows("1"))
tk.MustExec("set tidb_opt_write_row_id = 0")
tk.MustQuery(`select @@session.tidb_opt_write_row_id;`).Check(testkit.Rows("0"))
tk.MustExec("set tidb_opt_write_row_id = true")
tk.MustQuery(`select @@session.tidb_opt_write_row_id;`).Check(testkit.Rows("1"))
tk.MustExec("set tidb_opt_write_row_id = false")
tk.MustQuery(`select @@session.tidb_opt_write_row_id;`).Check(testkit.Rows("0"))
tk.MustExec("set tidb_opt_write_row_id = On")
tk.MustQuery(`select @@session.tidb_opt_write_row_id;`).Check(testkit.Rows("1"))
tk.MustExec("set tidb_opt_write_row_id = Off")
tk.MustQuery(`select @@session.tidb_opt_write_row_id;`).Check(testkit.Rows("0"))
require.Error(t, tk.ExecToErr("set tidb_opt_write_row_id = 'abc'"))
tk.MustQuery(`select @@session.tidb_opt_write_row_id;`).Check(testkit.Rows("0"))
tk.MustExec("set tidb_checksum_table_concurrency = 42")
tk.MustQuery(`select @@tidb_checksum_table_concurrency;`).Check(testkit.Rows("42"))
require.Error(t, tk.ExecToErr("set tidb_checksum_table_concurrency = 'abc'"))
tk.MustQuery(`select @@tidb_checksum_table_concurrency;`).Check(testkit.Rows("42"))
tk.MustExec("set tidb_checksum_table_concurrency = 257")
tk.MustQuery(`select @@tidb_checksum_table_concurrency;`).Check(testkit.Rows(strconv.Itoa(variable.MaxConfigurableConcurrency)))
tk.MustExec("set tidb_build_stats_concurrency = 42")
tk.MustQuery(`select @@tidb_build_stats_concurrency;`).Check(testkit.Rows("42"))
require.Error(t, tk.ExecToErr("set tidb_build_stats_concurrency = 'abc'"))
tk.MustQuery(`select @@tidb_build_stats_concurrency;`).Check(testkit.Rows("42"))
tk.MustExec("set tidb_build_stats_concurrency = 257")
tk.MustQuery(`select @@tidb_build_stats_concurrency;`).Check(testkit.Rows(strconv.Itoa(variable.MaxConfigurableConcurrency)))
tk.MustExec(`set tidb_partition_prune_mode = "static"`)
tk.MustQuery(`select @@tidb_partition_prune_mode;`).Check(testkit.Rows("static"))
tk.MustExec(`set tidb_partition_prune_mode = "dynamic"`)
tk.MustQuery(`select @@tidb_partition_prune_mode;`).Check(testkit.Rows("dynamic"))
tk.MustExec(`set tidb_partition_prune_mode = "static-only"`)
tk.MustQuery(`select @@tidb_partition_prune_mode;`).Check(testkit.Rows("static"))
tk.MustExec(`set tidb_partition_prune_mode = "dynamic-only"`)
tk.MustQuery(`select @@tidb_partition_prune_mode;`).Check(testkit.Rows("dynamic"))
require.Error(t, tk.ExecToErr("set tidb_partition_prune_mode = 'abc'"))
tk.MustQuery(`select @@tidb_partition_prune_mode;`).Check(testkit.Rows("dynamic"))
tk.MustExec("set tidb_constraint_check_in_place = 1")
tk.MustQuery(`select @@session.tidb_constraint_check_in_place;`).Check(testkit.Rows("1"))
tk.MustExec("set global tidb_constraint_check_in_place = 0")
tk.MustQuery(`select @@global.tidb_constraint_check_in_place;`).Check(testkit.Rows("0"))
tk.MustExec("set tidb_batch_commit = 0")
tk.MustQuery("select @@session.tidb_batch_commit;").Check(testkit.Rows("0"))
tk.MustExec("set tidb_batch_commit = 1")
tk.MustQuery("select @@session.tidb_batch_commit;").Check(testkit.Rows("1"))
require.Error(t, tk.ExecToErr("set global tidb_batch_commit = 0"))
require.Error(t, tk.ExecToErr("set global tidb_batch_commit = 2"))
// test skip isolation level check: init
tk.MustExec("SET GLOBAL tidb_skip_isolation_level_check = 0")
tk.MustExec("SET SESSION tidb_skip_isolation_level_check = 0")
tk.MustExec("SET GLOBAL TRANSACTION ISOLATION LEVEL READ COMMITTED")
tk.MustExec("SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED")
tk.MustQuery("select @@global.tx_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustQuery("select @@global.transaction_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustQuery("select @@session.tx_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustQuery("select @@session.transaction_isolation").Check(testkit.Rows("READ-COMMITTED"))
// test skip isolation level check: error
err = tk.ExecToErr("SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE")
require.True(t, terror.ErrorEqual(err, variable.ErrUnsupportedIsolationLevel), fmt.Sprintf("err %v", err))
tk.MustQuery("select @@session.tx_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustQuery("select @@session.transaction_isolation").Check(testkit.Rows("READ-COMMITTED"))
err = tk.ExecToErr("SET GLOBAL TRANSACTION ISOLATION LEVEL SERIALIZABLE")
require.True(t, terror.ErrorEqual(err, variable.ErrUnsupportedIsolationLevel), fmt.Sprintf("err %v", err))
tk.MustQuery("select @@global.tx_isolation").Check(testkit.Rows("READ-COMMITTED"))
tk.MustQuery("select @@global.transaction_isolation").Check(testkit.Rows("READ-COMMITTED"))
// test skip isolation level check: success
tk.MustExec("SET GLOBAL tidb_skip_isolation_level_check = 1")
tk.MustExec("SET SESSION tidb_skip_isolation_level_check = 1")
tk.MustExec("SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE")
tk.MustQuery("show warnings").Check(testkit.Rows(
"Warning 8048 The isolation level 'SERIALIZABLE' is not supported. Set tidb_skip_isolation_level_check=1 to skip this error"))
tk.MustQuery("select @@session.tx_isolation").Check(testkit.Rows("SERIALIZABLE"))
tk.MustQuery("select @@session.transaction_isolation").Check(testkit.Rows("SERIALIZABLE"))
// test skip isolation level check: success
tk.MustExec("SET GLOBAL tidb_skip_isolation_level_check = 0")
tk.MustExec("SET SESSION tidb_skip_isolation_level_check = 1")
tk.MustExec("SET GLOBAL TRANSACTION ISOLATION LEVEL READ UNCOMMITTED")
tk.MustQuery("show warnings").Check(testkit.Rows(
"Warning 8048 The isolation level 'READ-UNCOMMITTED' is not supported. Set tidb_skip_isolation_level_check=1 to skip this error"))
tk.MustQuery("select @@global.tx_isolation").Check(testkit.Rows("READ-UNCOMMITTED"))
tk.MustQuery("select @@global.transaction_isolation").Check(testkit.Rows("READ-UNCOMMITTED"))
// test skip isolation level check: reset
tk.MustExec("SET GLOBAL transaction_isolation='REPEATABLE-READ'") // should reset tx_isolation back to rr before reset tidb_skip_isolation_level_check
tk.MustExec("SET GLOBAL tidb_skip_isolation_level_check = 0")
tk.MustExec("SET SESSION tidb_skip_isolation_level_check = 0")
// test for tidb_wait_split_region_finish
tk.MustQuery(`select @@session.tidb_wait_split_region_finish;`).Check(testkit.Rows("1"))
tk.MustExec("set tidb_wait_split_region_finish = 1")
tk.MustQuery(`select @@session.tidb_wait_split_region_finish;`).Check(testkit.Rows("1"))
tk.MustExec("set tidb_wait_split_region_finish = 0")
tk.MustQuery(`select @@session.tidb_wait_split_region_finish;`).Check(testkit.Rows("0"))
// test for tidb_scatter_region
tk.MustQuery(`select @@global.tidb_scatter_region;`).Check(testkit.Rows("0"))
tk.MustExec("set global tidb_scatter_region = 1")
tk.MustQuery(`select @@global.tidb_scatter_region;`).Check(testkit.Rows("1"))
tk.MustExec("set global tidb_scatter_region = 0")
tk.MustQuery(`select @@global.tidb_scatter_region;`).Check(testkit.Rows("0"))
require.Error(t, tk.ExecToErr("set session tidb_scatter_region = 0"))
require.Error(t, tk.ExecToErr(`select @@session.tidb_scatter_region;`))
// test for tidb_wait_split_region_timeout
tk.MustQuery(`select @@session.tidb_wait_split_region_timeout;`).Check(testkit.Rows(strconv.Itoa(variable.DefWaitSplitRegionTimeout)))
tk.MustExec("set tidb_wait_split_region_timeout = 1")
tk.MustQuery(`select @@session.tidb_wait_split_region_timeout;`).Check(testkit.Rows("1"))
tk.MustExec("set tidb_wait_split_region_timeout = 0")
tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_wait_split_region_timeout value: '0'"))
tk.MustQuery(`select @@tidb_wait_split_region_timeout`).Check(testkit.Rows("1"))
tk.MustQuery(`select @@session.tidb_wait_split_region_timeout;`).Check(testkit.Rows("1"))
tk.MustExec("set session tidb_backoff_weight = 3")
tk.MustQuery("select @@session.tidb_backoff_weight;").Check(testkit.Rows("3"))
tk.MustExec("set session tidb_backoff_weight = 20")
tk.MustQuery("select @@session.tidb_backoff_weight;").Check(testkit.Rows("20"))
tk.MustExec("set session tidb_backoff_weight = -1")
tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_backoff_weight value: '-1'"))
tk.MustExec("set global tidb_backoff_weight = 0")
tk.MustQuery("select @@global.tidb_backoff_weight;").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_backoff_weight = 10")
tk.MustQuery("select @@global.tidb_backoff_weight;").Check(testkit.Rows("10"))
tk.MustExec("set @@tidb_expensive_query_time_threshold=70")
tk.MustQuery("select @@tidb_expensive_query_time_threshold;").Check(testkit.Rows("70"))
tk.MustQuery("select @@global.tidb_store_limit;").Check(testkit.Rows("0"))
tk.MustExec("set @@global.tidb_store_limit = 100")
tk.MustQuery("select @@global.tidb_store_limit;").Check(testkit.Rows("100"))
tk.MustExec("set @@global.tidb_store_limit = 0")
tk.MustExec("set global tidb_store_limit = 10000")
tk.MustQuery("select @@global.tidb_store_limit;").Check(testkit.Rows("10000"))
tk.MustQuery("select @@global.tidb_txn_commit_batch_size;").Check(testkit.Rows("16384"))
tk.MustExec("set @@global.tidb_txn_commit_batch_size = 100")
tk.MustQuery("select @@global.tidb_txn_commit_batch_size;").Check(testkit.Rows("100"))
tk.MustExec("set @@global.tidb_txn_commit_batch_size = 0")
tk.MustQuery("select @@global.tidb_txn_commit_batch_size;").Check(testkit.Rows("1"))
tk.MustExec("set global tidb_txn_commit_batch_size = 100")
tk.MustQuery("select @@global.tidb_txn_commit_batch_size;").Check(testkit.Rows("100"))
tk.MustQuery("select @@session.tidb_metric_query_step;").Check(testkit.Rows("60"))
tk.MustExec("set @@session.tidb_metric_query_step = 120")
tk.MustExec("set @@session.tidb_metric_query_step = 9")
tk.MustQuery(`show warnings`).Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_metric_query_step value: '9'"))
tk.MustQuery("select @@session.tidb_metric_query_step;").Check(testkit.Rows("10"))
tk.MustQuery("select @@session.tidb_metric_query_range_duration;").Check(testkit.Rows("60"))
tk.MustExec("set @@session.tidb_metric_query_range_duration = 120")
tk.MustExec("set @@session.tidb_metric_query_range_duration = 9")
tk.MustQuery(`show warnings`).Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_metric_query_range_duration value: '9'"))
tk.MustQuery("select @@session.tidb_metric_query_range_duration;").Check(testkit.Rows("10"))
tk.MustExec("set @@cte_max_recursion_depth=100")
tk.MustQuery("select @@cte_max_recursion_depth").Check(testkit.Rows("100"))
tk.MustExec("set @@global.cte_max_recursion_depth=100")
tk.MustQuery("select @@global.cte_max_recursion_depth").Check(testkit.Rows("100"))
tk.MustExec("set @@cte_max_recursion_depth=-1")
tk.MustQuery(`show warnings`).Check(testkit.Rows("Warning 1292 Truncated incorrect cte_max_recursion_depth value: '-1'"))
tk.MustQuery("select @@cte_max_recursion_depth").Check(testkit.Rows("0"))
// test for tidb_redact_log
tk.MustQuery(`select @@global.tidb_redact_log;`).Check(testkit.Rows("0"))
tk.MustExec("set global tidb_redact_log = 1")
tk.MustQuery(`select @@global.tidb_redact_log;`).Check(testkit.Rows("1"))
tk.MustExec("set global tidb_redact_log = 0")
tk.MustQuery(`select @@global.tidb_redact_log;`).Check(testkit.Rows("0"))
tk.MustExec("set session tidb_redact_log = 0")
tk.MustQuery(`select @@session.tidb_redact_log;`).Check(testkit.Rows("0"))
tk.MustExec("set session tidb_redact_log = 1")
tk.MustQuery(`select @@session.tidb_redact_log;`).Check(testkit.Rows("1"))
tk.MustQuery("select @@tidb_dml_batch_size;").Check(testkit.Rows("0"))
tk.MustExec("set @@session.tidb_dml_batch_size = 120")
tk.MustQuery("select @@tidb_dml_batch_size;").Check(testkit.Rows("120"))
tk.MustExec("set @@session.tidb_dml_batch_size = -120")
tk.MustQuery(`show warnings`).Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_dml_batch_size value: '?'")) // redacted because of tidb_redact_log = 1 above
tk.MustQuery("select @@session.tidb_dml_batch_size").Check(testkit.Rows("0"))
tk.MustExec("set session tidb_redact_log = 0")
tk.MustExec("set session tidb_dml_batch_size = -120")
tk.MustQuery(`show warnings`).Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_dml_batch_size value: '-120'")) // without redaction
tk.MustExec("set @@session.tidb_dml_batch_size = 120")
tk.MustExec("set @@global.tidb_dml_batch_size = 200") // now permitted due to TiDB #19809
tk.MustQuery("select @@tidb_dml_batch_size;").Check(testkit.Rows("120")) // global only applies to new sessions
err = tk.ExecToErr("set tidb_enable_parallel_apply=-1")
require.True(t, terror.ErrorEqual(err, variable.ErrWrongValueForVar))
// test for tidb_mem_quota_apply_cache
defVal := fmt.Sprintf("%v", variable.DefTiDBMemQuotaApplyCache)
tk.MustQuery(`select @@tidb_mem_quota_apply_cache`).Check(testkit.Rows(defVal))
tk.MustExec(`set global tidb_mem_quota_apply_cache = 1`)
tk.MustQuery(`select @@global.tidb_mem_quota_apply_cache`).Check(testkit.Rows("1"))
tk.MustExec(`set global tidb_mem_quota_apply_cache = 0`)
tk.MustQuery(`select @@global.tidb_mem_quota_apply_cache`).Check(testkit.Rows("0"))
tk.MustExec(`set tidb_mem_quota_apply_cache = 123`)
tk.MustQuery(`select @@global.tidb_mem_quota_apply_cache`).Check(testkit.Rows("0"))
tk.MustQuery(`select @@tidb_mem_quota_apply_cache`).Check(testkit.Rows("123"))
// test for tidb_mem_quota_bind_cache
defVal = fmt.Sprintf("%v", variable.DefTiDBMemQuotaBindingCache)
tk.MustQuery(`select @@tidb_mem_quota_binding_cache`).Check(testkit.Rows(defVal))
tk.MustExec(`set global tidb_mem_quota_binding_cache = 1`)
tk.MustQuery(`select @@global.tidb_mem_quota_binding_cache`).Check(testkit.Rows("1"))
tk.MustExec(`set global tidb_mem_quota_binding_cache = 0`)
tk.MustQuery(`select @@global.tidb_mem_quota_binding_cache`).Check(testkit.Rows("0"))
tk.MustExec(`set global tidb_mem_quota_binding_cache = 123`)
tk.MustQuery(`select @@global.tidb_mem_quota_binding_cache`).Check(testkit.Rows("123"))
tk.MustQuery(`select @@global.tidb_mem_quota_binding_cache`).Check(testkit.Rows("123"))
// test for tidb_enable_parallel_apply
tk.MustQuery(`select @@tidb_enable_parallel_apply`).Check(testkit.Rows("0"))
tk.MustExec(`set global tidb_enable_parallel_apply = 1`)
tk.MustQuery(`select @@global.tidb_enable_parallel_apply`).Check(testkit.Rows("1"))
tk.MustExec(`set global tidb_enable_parallel_apply = 0`)
tk.MustQuery(`select @@global.tidb_enable_parallel_apply`).Check(testkit.Rows("0"))
tk.MustExec(`set tidb_enable_parallel_apply=1`)
tk.MustQuery(`select @@global.tidb_enable_parallel_apply`).Check(testkit.Rows("0"))
tk.MustQuery(`select @@tidb_enable_parallel_apply`).Check(testkit.Rows("1"))
tk.MustQuery(`select @@global.tidb_general_log;`).Check(testkit.Rows("0"))
tk.MustQuery(`show variables like 'tidb_general_log';`).Check(testkit.Rows("tidb_general_log OFF"))
tk.MustExec("set tidb_general_log = 1")
tk.MustQuery(`select @@global.tidb_general_log;`).Check(testkit.Rows("1"))
tk.MustQuery(`show variables like 'tidb_general_log';`).Check(testkit.Rows("tidb_general_log ON"))
tk.MustExec("set tidb_general_log = 0")
tk.MustQuery(`select @@global.tidb_general_log;`).Check(testkit.Rows("0"))
tk.MustQuery(`show variables like 'tidb_general_log';`).Check(testkit.Rows("tidb_general_log OFF"))
tk.MustExec("set tidb_general_log = on")
tk.MustQuery(`select @@global.tidb_general_log;`).Check(testkit.Rows("1"))
tk.MustQuery(`show variables like 'tidb_general_log';`).Check(testkit.Rows("tidb_general_log ON"))
tk.MustExec("set tidb_general_log = off")
tk.MustQuery(`select @@global.tidb_general_log;`).Check(testkit.Rows("0"))
tk.MustQuery(`show variables like 'tidb_general_log';`).Check(testkit.Rows("tidb_general_log OFF"))
require.Error(t, tk.ExecToErr("set tidb_general_log = abc"))
require.Error(t, tk.ExecToErr("set tidb_general_log = 123"))
tk.MustExec(`SET @@character_set_results = NULL;`)
tk.MustQuery(`select @@character_set_results;`).Check(testkit.Rows(""))
varList := []string{"character_set_server", "character_set_client", "character_set_filesystem", "character_set_database"}
for _, v := range varList {
tk.MustGetErrCode(fmt.Sprintf("SET @@global.%s = @global_start_value;", v), mysql.ErrWrongValueForVar)
tk.MustGetErrCode(fmt.Sprintf("SET @@%s = @global_start_value;", v), mysql.ErrWrongValueForVar)
tk.MustGetErrCode(fmt.Sprintf("SET @@%s = NULL;", v), mysql.ErrWrongValueForVar)
tk.MustGetErrCode(fmt.Sprintf("SET @@%s = \"\";", v), mysql.ErrWrongValueForVar)
tk.MustGetErrMsg(fmt.Sprintf("SET @@%s = \"somecharset\";", v), "Unknown charset somecharset")
// we do not support set character_set_xxx or collation_xxx to a collation id.
tk.MustGetErrMsg(fmt.Sprintf("SET @@global.%s = 46;", v), "Unknown charset 46")
tk.MustGetErrMsg(fmt.Sprintf("SET @@%s = 46;", v), "Unknown charset 46")
}
tk.MustExec("SET SESSION tidb_enable_extended_stats = on")
tk.MustQuery("select @@session.tidb_enable_extended_stats").Check(testkit.Rows("1"))
tk.MustExec("SET SESSION tidb_enable_extended_stats = off")
tk.MustQuery("select @@session.tidb_enable_extended_stats").Check(testkit.Rows("0"))
tk.MustExec("SET GLOBAL tidb_enable_extended_stats = on")
tk.MustQuery("select @@global.tidb_enable_extended_stats").Check(testkit.Rows("1"))
tk.MustExec("SET GLOBAL tidb_enable_extended_stats = off")
tk.MustQuery("select @@global.tidb_enable_extended_stats").Check(testkit.Rows("0"))
tk.MustExec("SET SESSION tidb_allow_fallback_to_tikv = 'tiflash'")
tk.MustQuery("select @@session.tidb_allow_fallback_to_tikv").Check(testkit.Rows("tiflash"))
tk.MustExec("SET SESSION tidb_allow_fallback_to_tikv = ''")
tk.MustQuery("select @@session.tidb_allow_fallback_to_tikv").Check(testkit.Rows(""))
tk.MustExec("SET GLOBAL tidb_allow_fallback_to_tikv = 'tiflash'")
tk.MustQuery("select @@global.tidb_allow_fallback_to_tikv").Check(testkit.Rows("tiflash"))
tk.MustExec("SET GLOBAL tidb_allow_fallback_to_tikv = ''")
tk.MustQuery("select @@global.tidb_allow_fallback_to_tikv").Check(testkit.Rows(""))
tk.MustExec("set @@tidb_allow_fallback_to_tikv = 'tiflash, tiflash, tiflash'")
tk.MustQuery("select @@tidb_allow_fallback_to_tikv").Check(testkit.Rows("tiflash"))
tk.MustGetErrMsg("SET SESSION tidb_allow_fallback_to_tikv = 'tikv,tiflash'", "[variable:1231]Variable 'tidb_allow_fallback_to_tikv' can't be set to the value of 'tikv,tiflash'")
tk.MustGetErrMsg("SET GLOBAL tidb_allow_fallback_to_tikv = 'tikv,tiflash'", "[variable:1231]Variable 'tidb_allow_fallback_to_tikv' can't be set to the value of 'tikv,tiflash'")
tk.MustGetErrMsg("set @@tidb_allow_fallback_to_tikv = 'tidb, tiflash, tiflash'", "[variable:1231]Variable 'tidb_allow_fallback_to_tikv' can't be set to the value of 'tidb, tiflash, tiflash'")
tk.MustGetErrMsg("set @@tidb_allow_fallback_to_tikv = 'unknown, tiflash, tiflash'", "[variable:1231]Variable 'tidb_allow_fallback_to_tikv' can't be set to the value of 'unknown, tiflash, tiflash'")
// Test issue #22145
tk.MustExec(`set global sync_relay_log = "'"`)
tk.MustExec(`set @@global.tidb_enable_clustered_index = 'int_only'`)
tk.MustQuery(`show warnings`).Check(testkit.Rows("Warning 1287 'INT_ONLY' is deprecated and will be removed in a future release. Please use 'ON' or 'OFF' instead"))
tk.MustExec(`set @@global.tidb_enable_clustered_index = 'off'`)
tk.MustQuery(`show warnings`).Check(testkit.Rows())
tk.MustExec("set @@tidb_enable_clustered_index = 'off'")
tk.MustQuery(`show warnings`).Check(testkit.Rows())
tk.MustExec("set @@tidb_enable_clustered_index = 'on'")
tk.MustQuery(`show warnings`).Check(testkit.Rows())
tk.MustExec("set @@tidb_enable_clustered_index = 'int_only'")
tk.MustQuery(`show warnings`).Check(testkit.Rows("Warning 1287 'INT_ONLY' is deprecated and will be removed in a future release. Please use 'ON' or 'OFF' instead"))
// test for tidb_enable_ordered_result_mode
tk.MustQuery(`select @@tidb_enable_ordered_result_mode`).Check(testkit.Rows("0"))
tk.MustExec(`set global tidb_enable_ordered_result_mode = 1`)
tk.MustQuery(`select @@global.tidb_enable_ordered_result_mode`).Check(testkit.Rows("1"))
tk.MustExec(`set global tidb_enable_ordered_result_mode = 0`)
tk.MustQuery(`select @@global.tidb_enable_ordered_result_mode`).Check(testkit.Rows("0"))
tk.MustExec(`set tidb_enable_ordered_result_mode=1`)
tk.MustQuery(`select @@global.tidb_enable_ordered_result_mode`).Check(testkit.Rows("0"))
tk.MustQuery(`select @@tidb_enable_ordered_result_mode`).Check(testkit.Rows("1"))
// test for tidb_opt_enable_correlation_adjustment
tk.MustQuery(`select @@tidb_opt_enable_correlation_adjustment`).Check(testkit.Rows("1"))
tk.MustExec(`set global tidb_opt_enable_correlation_adjustment = 0`)
tk.MustQuery(`select @@global.tidb_opt_enable_correlation_adjustment`).Check(testkit.Rows("0"))
tk.MustExec(`set global tidb_opt_enable_correlation_adjustment = 1`)
tk.MustQuery(`select @@global.tidb_opt_enable_correlation_adjustment`).Check(testkit.Rows("1"))
tk.MustExec(`set tidb_opt_enable_correlation_adjustment=0`)
tk.MustQuery(`select @@global.tidb_opt_enable_correlation_adjustment`).Check(testkit.Rows("1"))
tk.MustQuery(`select @@tidb_opt_enable_correlation_adjustment`).Check(testkit.Rows("0"))
// test for tidb_opt_limit_push_down_threshold
tk.MustQuery(`select @@tidb_opt_limit_push_down_threshold`).Check(testkit.Rows("100"))
tk.MustExec(`set global tidb_opt_limit_push_down_threshold = 20`)
tk.MustQuery(`select @@global.tidb_opt_limit_push_down_threshold`).Check(testkit.Rows("20"))
tk.MustExec(`set global tidb_opt_limit_push_down_threshold = 100`)
tk.MustQuery(`select @@global.tidb_opt_limit_push_down_threshold`).Check(testkit.Rows("100"))
tk.MustExec(`set tidb_opt_limit_push_down_threshold = 20`)
tk.MustQuery(`select @@global.tidb_opt_limit_push_down_threshold`).Check(testkit.Rows("100"))
tk.MustQuery(`select @@tidb_opt_limit_push_down_threshold`).Check(testkit.Rows("20"))
tk.MustQuery("select @@tidb_opt_prefer_range_scan").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_opt_prefer_range_scan = 1")
tk.MustQuery("select @@global.tidb_opt_prefer_range_scan").Check(testkit.Rows("1"))
tk.MustExec("set global tidb_opt_prefer_range_scan = 0")
tk.MustQuery("select @@global.tidb_opt_prefer_range_scan").Check(testkit.Rows("0"))
tk.MustExec("set session tidb_opt_prefer_range_scan = 1")
tk.MustQuery("select @@session.tidb_opt_prefer_range_scan").Check(testkit.Rows("1"))
tk.MustExec("set session tidb_opt_prefer_range_scan = 0")
tk.MustQuery("select @@session.tidb_opt_prefer_range_scan").Check(testkit.Rows("0"))
tk.MustQuery("select @@tidb_tso_client_batch_max_wait_time").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_tso_client_batch_max_wait_time = 0.5")
tk.MustQuery("select @@tidb_tso_client_batch_max_wait_time").Check(testkit.Rows("0.5"))
tk.MustExec("set global tidb_tso_client_batch_max_wait_time = 1")
tk.MustQuery("select @@tidb_tso_client_batch_max_wait_time").Check(testkit.Rows("1"))
tk.MustExec("set global tidb_tso_client_batch_max_wait_time = 1.5")
tk.MustQuery("select @@tidb_tso_client_batch_max_wait_time").Check(testkit.Rows("1.5"))
tk.MustExec("set global tidb_tso_client_batch_max_wait_time = 10")
tk.MustQuery("select @@tidb_tso_client_batch_max_wait_time").Check(testkit.Rows("10"))
tk.MustExec("set global tidb_tso_client_batch_max_wait_time = -1")
tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_tso_client_batch_max_wait_time value: '-1'"))
tk.MustQuery("select @@tidb_tso_client_batch_max_wait_time").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_tso_client_batch_max_wait_time = -0.01")
tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_tso_client_batch_max_wait_time value: '-0.01'"))
tk.MustQuery("select @@tidb_tso_client_batch_max_wait_time").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_tso_client_batch_max_wait_time = 10.01")
tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_tso_client_batch_max_wait_time value: '10.01'"))
tk.MustQuery("select @@tidb_tso_client_batch_max_wait_time").Check(testkit.Rows("10"))
tk.MustExec("set global tidb_tso_client_batch_max_wait_time = 10.1")
tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_tso_client_batch_max_wait_time value: '10.1'"))
tk.MustQuery("select @@tidb_tso_client_batch_max_wait_time").Check(testkit.Rows("10"))
require.Error(t, tk.ExecToErr("set tidb_tso_client_batch_max_wait_time = 1"))
tk.MustQuery("select @@tidb_enable_tso_follower_proxy").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_enable_tso_follower_proxy = 1")
tk.MustQuery("select @@tidb_enable_tso_follower_proxy").Check(testkit.Rows("1"))
tk.MustExec("set global tidb_enable_tso_follower_proxy = 0")
tk.MustQuery("select @@tidb_enable_tso_follower_proxy").Check(testkit.Rows("0"))
require.Error(t, tk.ExecToErr("set tidb_enable_tso_follower_proxy = 1"))
tk.MustQuery("select @@tidb_enable_historical_stats").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_enable_historical_stats = 1")
tk.MustQuery("select @@tidb_enable_historical_stats").Check(testkit.Rows("1"))
tk.MustExec("set global tidb_enable_historical_stats = 0")
tk.MustQuery("select @@tidb_enable_historical_stats").Check(testkit.Rows("0"))
// test for tidb_enable_column_tracking
tk.MustQuery("select @@tidb_enable_column_tracking").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_enable_column_tracking = 1")
tk.MustQuery("select @@tidb_enable_column_tracking").Check(testkit.Rows("1"))
tk.MustExec("set global tidb_enable_column_tracking = 0")
tk.MustQuery("select @@tidb_enable_column_tracking").Check(testkit.Rows("0"))
// When set tidb_enable_column_tracking off, we record the time of the setting operation.
tk.MustQuery("select count(1) from mysql.tidb where variable_name = 'tidb_disable_column_tracking_time' and variable_value is not null").Check(testkit.Rows("1"))
tk.MustExec("set global tidb_enable_column_tracking = 1")
tk.MustQuery("select @@tidb_enable_column_tracking").Check(testkit.Rows("1"))
require.Error(t, tk.ExecToErr("select @@session.tidb_enable_column_tracking"))
require.Error(t, tk.ExecToErr("set tidb_enable_column_tracking = 0"))
require.Error(t, tk.ExecToErr("set global tidb_enable_column_tracking = -1"))
// test for tidb_ignore_prepared_cache_close_stmt
tk.MustQuery("select @@global.tidb_ignore_prepared_cache_close_stmt").Check(testkit.Rows("0")) // default value is 0
tk.MustExec("set global tidb_ignore_prepared_cache_close_stmt=1")
tk.MustQuery("select @@global.tidb_ignore_prepared_cache_close_stmt").Check(testkit.Rows("1"))
tk.MustQuery("show global variables like 'tidb_ignore_prepared_cache_close_stmt'").Check(testkit.Rows("tidb_ignore_prepared_cache_close_stmt ON"))
tk.MustExec("set global tidb_ignore_prepared_cache_close_stmt=0")
tk.MustQuery("select @@global.tidb_ignore_prepared_cache_close_stmt").Check(testkit.Rows("0"))
tk.MustQuery("show global variables like 'tidb_ignore_prepared_cache_close_stmt'").Check(testkit.Rows("tidb_ignore_prepared_cache_close_stmt OFF"))
// test for tidb_enable_new_cost_interface
tk.MustQuery("select @@global.tidb_enable_new_cost_interface").Check(testkit.Rows("1")) // default value is 1
tk.MustExec("set global tidb_enable_new_cost_interface=0")
tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1287 'OFF' is deprecated and will be removed in a future release. Please use ON instead"))
tk.MustQuery("select @@global.tidb_enable_new_cost_interface").Check(testkit.Rows("1"))
tk.MustExec("set tidb_enable_new_cost_interface=0")
tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1287 'OFF' is deprecated and will be removed in a future release. Please use ON instead"))
tk.MustQuery("select @@session.tidb_enable_new_cost_interface").Check(testkit.Rows("1"))
// test for tidb_remove_orderby_in_subquery
tk.MustQuery("select @@session.tidb_remove_orderby_in_subquery").Check(testkit.Rows("0")) // default value is 0
tk.MustExec("set session tidb_remove_orderby_in_subquery=1")
tk.MustQuery("select @@session.tidb_remove_orderby_in_subquery").Check(testkit.Rows("1"))
tk.MustQuery("select @@global.tidb_remove_orderby_in_subquery").Check(testkit.Rows("0")) // default value is 0
tk.MustExec("set global tidb_remove_orderby_in_subquery=1")
tk.MustQuery("select @@global.tidb_remove_orderby_in_subquery").Check(testkit.Rows("1"))
// test for tidb_opt_skew_distinct_agg
tk.MustQuery("select @@session.tidb_opt_skew_distinct_agg").Check(testkit.Rows("0")) // default value is 0
tk.MustExec("set session tidb_opt_skew_distinct_agg=1")
tk.MustQuery("select @@session.tidb_opt_skew_distinct_agg").Check(testkit.Rows("1"))
tk.MustQuery("select @@global.tidb_opt_skew_distinct_agg").Check(testkit.Rows("0")) // default value is 0
tk.MustExec("set global tidb_opt_skew_distinct_agg=1")
tk.MustQuery("select @@global.tidb_opt_skew_distinct_agg").Check(testkit.Rows("1"))
// test for tidb_opt_three_stage_distinct_agg
tk.MustQuery("select @@session.tidb_opt_three_stage_distinct_agg").Check(testkit.Rows("1")) // default value is 1
tk.MustExec("set session tidb_opt_three_stage_distinct_agg=0")
tk.MustQuery("select @@session.tidb_opt_three_stage_distinct_agg").Check(testkit.Rows("0"))
tk.MustQuery("select @@global.tidb_opt_three_stage_distinct_agg").Check(testkit.Rows("1")) // default value is 1
tk.MustExec("set global tidb_opt_three_stage_distinct_agg=0")
tk.MustQuery("select @@global.tidb_opt_three_stage_distinct_agg").Check(testkit.Rows("0"))
// the value of max_allowed_packet should be a multiple of 1024
tk.MustExec("set @@global.max_allowed_packet=16385")
tk.MustQuery("show warnings").Check(testkit.RowsWithSep("|", "Warning|1292|Truncated incorrect max_allowed_packet value: '16385'"))
result := tk.MustQuery("select @@global.max_allowed_packet;")
result.Check(testkit.Rows("16384"))
tk.MustExec("set @@global.max_allowed_packet=2047")
tk.MustQuery("show warnings").Check(testkit.RowsWithSep("|", "Warning|1292|Truncated incorrect max_allowed_packet value: '2047'"))
result = tk.MustQuery("select @@global.max_allowed_packet;")
result.Check(testkit.Rows("1024"))
tk.MustExec("set @@global.max_allowed_packet=0")
tk.MustQuery("show warnings").Check(testkit.RowsWithSep("|", "Warning|1292|Truncated incorrect max_allowed_packet value: '0'"))
result = tk.MustQuery("select @@global.max_allowed_packet;")
result.Check(testkit.Rows("1024"))
// test value of tidb_stats_cache_mem_quota
tk.MustQuery("select @@global.tidb_stats_cache_mem_quota").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_stats_cache_mem_quota = 200")
tk.MustQuery("select @@global.tidb_stats_cache_mem_quota").Check(testkit.Rows("200"))
// assert quota must larger than -1
tk.MustExec("set global tidb_stats_cache_mem_quota = -1")
tk.MustQuery("select @@global.tidb_stats_cache_mem_quota").Check(testkit.Rows("0"))
// assert quota muster smaller than 1TB
tk.MustExec("set global tidb_stats_cache_mem_quota = 1099511627777")
tk.MustQuery("select @@global.tidb_stats_cache_mem_quota").Check(testkit.Rows("1099511627776"))
// for read-only instance scoped system variables.
tk.MustGetErrCode("set @@global.plugin_load = ''", errno.ErrIncorrectGlobalLocalVar)
tk.MustGetErrCode("set @@global.plugin_dir = ''", errno.ErrIncorrectGlobalLocalVar)
// test for tidb_max_auto_analyze_time
tk.MustQuery("select @@tidb_max_auto_analyze_time").Check(testkit.Rows(strconv.Itoa(variable.DefTiDBMaxAutoAnalyzeTime)))
tk.MustExec("set global tidb_max_auto_analyze_time = 60")
tk.MustQuery("select @@tidb_max_auto_analyze_time").Check(testkit.Rows("60"))
tk.MustExec("set global tidb_max_auto_analyze_time = -1")
tk.MustQuery("select @@tidb_max_auto_analyze_time").Check(testkit.Rows("0"))
// test variables for cost model ver2
tk.MustQuery("select @@tidb_cost_model_version").Check(testkit.Rows(fmt.Sprintf("%v", variable.DefTiDBCostModelVer)))
tk.MustExec("set tidb_cost_model_version=3")
tk.MustQuery("show warnings").Check(testkit.RowsWithSep("|", "Warning|1292|Truncated incorrect tidb_cost_model_version value: '3'"))
tk.MustExec("set tidb_cost_model_version=0")
tk.MustQuery("show warnings").Check(testkit.RowsWithSep("|", "Warning|1292|Truncated incorrect tidb_cost_model_version value: '0'"))
tk.MustExec("set tidb_cost_model_version=2")
tk.MustQuery("select @@tidb_cost_model_version").Check(testkit.Rows("2"))
tk.MustQuery("select @@tidb_enable_analyze_snapshot").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_enable_analyze_snapshot = 1")
tk.MustQuery("select @@global.tidb_enable_analyze_snapshot").Check(testkit.Rows("1"))
tk.MustExec("set global tidb_enable_analyze_snapshot = 0")
tk.MustQuery("select @@global.tidb_enable_analyze_snapshot").Check(testkit.Rows("0"))
tk.MustExec("set session tidb_enable_analyze_snapshot = 1")
tk.MustQuery("select @@session.tidb_enable_analyze_snapshot").Check(testkit.Rows("1"))
tk.MustExec("set session tidb_enable_analyze_snapshot = 0")
tk.MustQuery("select @@session.tidb_enable_analyze_snapshot").Check(testkit.Rows("0"))
// test variables `init_connect'
tk.MustGetErrCode("set global init_connect = '-1'", mysql.ErrWrongTypeForVar)
tk.MustGetErrCode("set global init_connect = 'invalidstring'", mysql.ErrWrongTypeForVar)
tk.MustExec("set global init_connect = 'select now(); select timestamp()'")
// test variable 'tidb_enable_general_plan_cache'
// global scope
tk.MustQuery("select @@global.tidb_enable_general_plan_cache").Check(testkit.Rows("0")) // default value
tk.MustExec("set global tidb_enable_general_plan_cache = 1")
tk.MustQuery("select @@global.tidb_enable_general_plan_cache").Check(testkit.Rows("1"))
tk.MustExec("set global tidb_enable_general_plan_cache = 0")
tk.MustQuery("select @@global.tidb_enable_general_plan_cache").Check(testkit.Rows("0"))
// session scope
tk.MustQuery("select @@session.tidb_enable_general_plan_cache").Check(testkit.Rows("0")) // default value
tk.MustExec("set session tidb_enable_general_plan_cache = 1")
tk.MustQuery("select @@session.tidb_enable_general_plan_cache").Check(testkit.Rows("1"))
tk.MustExec("set session tidb_enable_general_plan_cache = 0")
tk.MustQuery("select @@session.tidb_enable_general_plan_cache").Check(testkit.Rows("0"))
// test variable 'tidb_general_plan_cache-size'
// global scope
tk.MustQuery("select @@global.tidb_general_plan_cache_size").Check(testkit.Rows("100")) // default value
tk.MustExec("set global tidb_general_plan_cache_size = 200")
tk.MustQuery("select @@global.tidb_general_plan_cache_size").Check(testkit.Rows("200"))
tk.MustExec("set global tidb_general_plan_cache_size = 200000000") // overflow
tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_general_plan_cache_size value: '200000000'"))
tk.MustQuery("select @@global.tidb_general_plan_cache_size").Check(testkit.Rows("100000"))
// session scope
tk.MustQuery("select @@session.tidb_general_plan_cache_size").Check(testkit.Rows("100")) // default value
tk.MustExec("set session tidb_general_plan_cache_size = 300")
tk.MustQuery("select @@session.tidb_general_plan_cache_size").Check(testkit.Rows("300"))
tk.MustExec("set session tidb_general_plan_cache_size = -1") // underflow
tk.MustQuery("show warnings").Check(testkit.Rows("Warning 1292 Truncated incorrect tidb_general_plan_cache_size value: '-1'"))
tk.MustQuery("select @@session.tidb_general_plan_cache_size").Check(testkit.Rows("1"))
// test variable 'foreign_key_checks'
// global scope
tk.MustQuery("select @@global.foreign_key_checks").Check(testkit.Rows("1")) // default value
tk.MustExec("set global foreign_key_checks = 0")
tk.MustQuery("select @@global.foreign_key_checks").Check(testkit.Rows("0"))
// session scope
tk.MustQuery("select @@session.foreign_key_checks").Check(testkit.Rows("1")) // default value
tk.MustExec("set session foreign_key_checks = 0")
tk.MustQuery("select @@session.foreign_key_checks").Check(testkit.Rows("0"))
// test variable 'tidb_enable_foreign_key'
// global scope
tk.MustQuery("select @@global.tidb_enable_foreign_key").Check(testkit.Rows("1")) // default value
tk.MustExec("set global tidb_enable_foreign_key = 0")
tk.MustQuery("select @@global.tidb_enable_foreign_key").Check(testkit.Rows("0"))
// test variable 'tidb_opt_force_inline_cte'
tk.MustQuery("select @@session.tidb_opt_force_inline_cte").Check(testkit.Rows("0")) // default value is 0
tk.MustExec("set session tidb_opt_force_inline_cte=1")
tk.MustQuery("select @@session.tidb_opt_force_inline_cte").Check(testkit.Rows("1"))
tk.MustQuery("select @@global.tidb_opt_force_inline_cte").Check(testkit.Rows("0")) // default value is 0
tk.MustExec("set global tidb_opt_force_inline_cte=1")
tk.MustQuery("select @@global.tidb_opt_force_inline_cte").Check(testkit.Rows("1"))
// test tidb_auto_analyze_partition_batch_size
tk.MustQuery("select @@global.tidb_auto_analyze_partition_batch_size").Check(testkit.Rows("1")) // default value is 1
tk.MustExec("set global tidb_auto_analyze_partition_batch_size = 2")
tk.MustQuery("select @@global.tidb_auto_analyze_partition_batch_size").Check(testkit.Rows("2"))
tk.MustExec("set global tidb_auto_analyze_partition_batch_size = 0")
tk.MustQuery("select @@global.tidb_auto_analyze_partition_batch_size").Check(testkit.Rows("1")) // min value is 1
tk.MustExec("set global tidb_auto_analyze_partition_batch_size = 9999")
tk.MustQuery("select @@global.tidb_auto_analyze_partition_batch_size").Check(testkit.Rows("1024")) // max value is 1024
// test variable 'tidb_opt_prefix_index_single_scan'
// global scope
tk.MustQuery("select @@global.tidb_opt_prefix_index_single_scan").Check(testkit.Rows("1")) // default value
tk.MustExec("set global tidb_opt_prefix_index_single_scan = 0")
tk.MustQuery("select @@global.tidb_opt_prefix_index_single_scan").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_opt_prefix_index_single_scan = 1")
tk.MustQuery("select @@global.tidb_opt_prefix_index_single_scan").Check(testkit.Rows("1"))
// session scope
tk.MustQuery("select @@session.tidb_opt_prefix_index_single_scan").Check(testkit.Rows("1")) // default value
tk.MustExec("set session tidb_opt_prefix_index_single_scan = 0")
tk.MustQuery("select @@session.tidb_opt_prefix_index_single_scan").Check(testkit.Rows("0"))
tk.MustExec("set session tidb_opt_prefix_index_single_scan = 1")
tk.MustQuery("select @@session.tidb_opt_prefix_index_single_scan").Check(testkit.Rows("1"))
// test tidb_opt_range_max_size
tk.MustQuery("select @@tidb_opt_range_max_size").Check(testkit.Rows("67108864"))
tk.MustExec("set global tidb_opt_range_max_size = -1")
tk.MustQuery("show warnings").Check(testkit.RowsWithSep("|", "Warning|1292|Truncated incorrect tidb_opt_range_max_size value: '-1'"))
tk.MustQuery("select @@global.tidb_opt_range_max_size").Check(testkit.Rows("0"))
tk.MustExec("set global tidb_opt_range_max_size = 1048576")
tk.MustQuery("select @@global.tidb_opt_range_max_size").Check(testkit.Rows("1048576"))
tk.MustExec("set session tidb_opt_range_max_size = 2097152")
tk.MustQuery("select @@session.tidb_opt_range_max_size").Check(testkit.Rows("2097152"))
// test for password validation
tk.MustQuery("SELECT @@GLOBAL.validate_password.enable").Check(testkit.Rows("0"))
tk.MustQuery("SELECT @@GLOBAL.validate_password.length").Check(testkit.Rows("8"))
tk.MustExec("SET GLOBAL validate_password.length = 3")
tk.MustQuery("SELECT @@GLOBAL.validate_password.length").Check(testkit.Rows("4"))
tk.MustExec("SET GLOBAL validate_password.mixed_case_count = 2")
tk.MustQuery("SELECT @@GLOBAL.validate_password.length").Check(testkit.Rows("6"))
// test tidb_cdc_write_source
require.Equal(t, uint64(0), tk.Session().GetSessionVars().CDCWriteSource)
tk.MustQuery("select @@tidb_cdc_write_source").Check(testkit.Rows("0"))
tk.MustExec("set @@session.tidb_cdc_write_source = 2")
tk.MustQuery("select @@tidb_cdc_write_source").Check(testkit.Rows("2"))
require.Equal(t, uint64(2), tk.Session().GetSessionVars().CDCWriteSource)
tk.MustExec("set @@session.tidb_cdc_write_source = 0")
require.Equal(t, uint64(0), tk.Session().GetSessionVars().CDCWriteSource)
}
func TestGetSetNoopVars(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
// By default you can get/set noop sysvars without issue.
tk.MustQuery("SELECT @@query_cache_type").Check(testkit.Rows("OFF"))
tk.MustQuery("SHOW VARIABLES LIKE 'query_cache_type'").Check(testkit.Rows("query_cache_type OFF"))
tk.MustExec("SET query_cache_type=2")
tk.MustQuery("SELECT @@query_cache_type").Check(testkit.Rows("DEMAND"))
// When tidb_enable_noop_variables is OFF, you can GET in @@ context
// and always SET. But you can't see in SHOW VARIABLES.
// Warnings are also returned.
tk.MustExec("SET GLOBAL tidb_enable_noop_variables = OFF")
defer tk.MustExec("SET GLOBAL tidb_enable_noop_variables = ON")
tk.MustQuery("SELECT @@global.tidb_enable_noop_variables").Check(testkit.Rows("OFF"))
tk.MustQuery("SELECT @@query_cache_type").Check(testkit.Rows("DEMAND"))
tk.MustQuery("SHOW WARNINGS").Check(testkit.Rows("Warning 8145 variable query_cache_type has no effect in TiDB"))
tk.MustQuery("SHOW VARIABLES LIKE 'query_cache_type'").Check(testkit.Rows())
tk.MustExec("SET query_cache_type = OFF")
tk.MustQuery("SHOW WARNINGS").Check(testkit.Rows("Warning 8144 setting query_cache_type has no effect in TiDB"))
// but the change is still effective.
tk.MustQuery("SELECT @@query_cache_type").Check(testkit.Rows("OFF"))
// Only ON and OFF supported
err := tk.ExecToErr("SET GLOBAL tidb_enable_noop_variables = 2")
require.Error(t, err)
require.Equal(t, "[variable:1231]Variable 'tidb_enable_noop_variables' can't be set to the value of '2'", err.Error())
err = tk.ExecToErr("SET GLOBAL tidb_enable_noop_variables = 'warn'")
require.Error(t, err)
require.Equal(t, "[variable:1231]Variable 'tidb_enable_noop_variables' can't be set to the value of 'warn'", err.Error())
}
func TestTruncateIncorrectIntSessionVar(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
testCases := []struct {
sessionVarName string
minValue int
maxValue int
}{
{"auto_increment_increment", 1, 65535},
{"auto_increment_offset", 1, 65535},
}
for _, tc := range testCases {
name := tc.sessionVarName
selectSQL := fmt.Sprintf("select @@%s;", name)
validValue := tc.minValue + (tc.maxValue-tc.minValue)/2
tk.MustExec(fmt.Sprintf("set @@%s = %d", name, validValue))
tk.MustQuery(selectSQL).Check(testkit.Rows(fmt.Sprintf("%d", validValue)))
tk.MustExec(fmt.Sprintf("set @@%s = %d", name, tc.minValue-1))
warnMsg := fmt.Sprintf("Warning 1292 Truncated incorrect %s value: '%d'", name, tc.minValue-1)
tk.MustQuery("show warnings").Check(testkit.Rows(warnMsg))
tk.MustQuery(selectSQL).Check(testkit.Rows(fmt.Sprintf("%d", tc.minValue)))
tk.MustExec(fmt.Sprintf("set @@%s = %d", name, tc.maxValue+1))
warnMsg = fmt.Sprintf("Warning 1292 Truncated incorrect %s value: '%d'", name, tc.maxValue+1)
tk.MustQuery("show warnings").Check(testkit.Rows(warnMsg))
tk.MustQuery(selectSQL).Check(testkit.Rows(fmt.Sprintf("%d", tc.maxValue)))
}
}
func TestSetCharset(t *testing.T) {
store := testkit.CreateMockStore(t)
tk := testkit.NewTestKit(t, store)
sessionVars := tk.Session().GetSessionVars()
var characterSetVariables = []string{
"character_set_client",
"character_set_connection",
"character_set_results",
"character_set_server",
"character_set_database",
"character_set_system",
"character_set_filesystem",
}
check := func(args ...string) {
for i, v := range characterSetVariables {
sVar, err := sessionVars.GetSessionOrGlobalSystemVar(context.Background(), v)
require.NoError(t, err)
require.Equal(t, args[i], sVar, fmt.Sprintf("%d: %s", i, characterSetVariables[i]))
}
}
check(
"utf8mb4",
"utf8mb4",
"utf8mb4",
"utf8mb4",
"utf8mb4",
"utf8",
"binary",
)
tk.MustExec(`SET NAMES latin1`)
check(
"latin1",
"latin1",
"latin1",
"utf8mb4",
"utf8mb4",
"utf8",
"binary",
)
tk.MustExec(`SET NAMES default`)
check(
"utf8mb4",
"utf8mb4",
"utf8mb4",
"utf8mb4",
"utf8mb4",
"utf8",
"binary",
)
// Issue #1523
tk.MustExec(`SET NAMES binary`)
check(
"binary",
"binary",
"binary",