| Server IP : 45.40.142.9 / Your IP : 216.73.216.250 Web Server : Apache System : Linux s45-40-142-9.secureserver.net 2.6.32-754.35.1.el6.x86_64 #1 SMP Sat Nov 7 12:42:14 UTC 2020 x86_64 User : bayspec ( 506) PHP Version : 5.6.40 Disable Function : NONE MySQL : ON | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON Directory : /usr/share/mysql-test/suite/sys_vars/t/ |
Upload File : |
--source include/have_optimizer_trace.inc SET @start_global_value = @@global.optimizer_trace; SELECT @start_global_value; # # exists as global and session # select @@global.optimizer_trace; select @@session.optimizer_trace; show global variables like 'optimizer_trace'; show session variables like 'optimizer_trace'; select * from information_schema.global_variables where variable_name='optimizer_trace'; select * from information_schema.session_variables where variable_name='optimizer_trace'; # # show that it's writable # set global optimizer_trace=1; select @@global.optimizer_trace; set session optimizer_trace=1; select @@session.optimizer_trace; set global optimizer_trace=0; select @@global.optimizer_trace; set session optimizer_trace=0; select @@session.optimizer_trace; set session optimizer_trace=default; select @@session.optimizer_trace; # # incorrect assignments # --error ER_WRONG_TYPE_FOR_VAR set global optimizer_trace=1.1; --error ER_WRONG_TYPE_FOR_VAR set global optimizer_trace=1e1; --error ER_WRONG_VALUE_FOR_VAR set session optimizer_trace="foobar"; SET @@global.optimizer_trace = @start_global_value; SELECT @@global.optimizer_trace;