| Server IP : 172.67.216.182 / Your IP : 172.69.176.6 Web Server : Apache System : Linux krdc-ubuntu-s-2vcpu-4gb-amd-blr1-01.localdomain 5.15.0-142-generic #152-Ubuntu SMP Mon May 19 10:54:31 UTC 2025 x86_64 User : www ( 1000) PHP Version : 7.4.33 Disable Function : passthru,exec,system,putenv,chroot,chgrp,chown,shell_exec,popen,proc_open,pcntl_exec,ini_alter,ini_restore,dl,openlog,syslog,readlink,symlink,popepassthru,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,imap_open,apache_setenv MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /www/server/mysql/src/mysql-test/suite/sys_vars/t/ |
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# # 2010-01-20 OBN Added check for I_S values after variable value changed # SET @start_global_value = @@global.optimizer_switch; SELECT @start_global_value; # # exists as global and session # select @@global.optimizer_switch; select @@session.optimizer_switch; show global variables like 'optimizer_switch'; show session variables like 'optimizer_switch'; --disable_warnings select * from information_schema.global_variables where variable_name='optimizer_switch'; select * from information_schema.session_variables where variable_name='optimizer_switch'; --enable_warnings # # show that it's writable # set global optimizer_switch=10; set session optimizer_switch=5; select @@global.optimizer_switch; select @@session.optimizer_switch; set global optimizer_switch="index_merge_sort_union=on"; set session optimizer_switch="index_merge=off"; select @@global.optimizer_switch; select @@session.optimizer_switch; show global variables like 'optimizer_switch'; show session variables like 'optimizer_switch'; --disable_warnings select * from information_schema.global_variables where variable_name='optimizer_switch'; select * from information_schema.session_variables where variable_name='optimizer_switch'; --enable_warnings set session optimizer_switch="default"; select @@session.optimizer_switch; # # incorrect assignments # --error ER_WRONG_TYPE_FOR_VAR set global optimizer_switch=1.1; --error ER_WRONG_TYPE_FOR_VAR set global optimizer_switch=1e1; --error ER_WRONG_VALUE_FOR_VAR set session optimizer_switch="index_merge"; --error ER_WRONG_VALUE_FOR_VAR set session optimizer_switch="foobar"; --echo # --echo # Bug#59894 set optimizer_switch to e or d causes invalid --echo # memory writes/valgrind warnings --echo set global optimizer_switch = 'def'; # means default --error ER_WRONG_VALUE_FOR_VAR set global optimizer_switch = 'e'; SET @@global.optimizer_switch = @start_global_value; SELECT @@global.optimizer_switch;