| 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/r/ |
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SET @start_global_value = @@global.optimizer_trace; SELECT @start_global_value; @start_global_value enabled=off,one_line=off select @@global.optimizer_trace; @@global.optimizer_trace enabled=off,one_line=off select @@session.optimizer_trace; @@session.optimizer_trace enabled=off,one_line=off show global variables like 'optimizer_trace'; Variable_name Value optimizer_trace enabled=off,one_line=off show session variables like 'optimizer_trace'; Variable_name Value optimizer_trace enabled=off,one_line=off select * from information_schema.global_variables where variable_name='optimizer_trace'; VARIABLE_NAME VARIABLE_VALUE OPTIMIZER_TRACE enabled=off,one_line=off select * from information_schema.session_variables where variable_name='optimizer_trace'; VARIABLE_NAME VARIABLE_VALUE OPTIMIZER_TRACE enabled=off,one_line=off set global optimizer_trace=1; select @@global.optimizer_trace; @@global.optimizer_trace enabled=on,one_line=off set session optimizer_trace=1; select @@session.optimizer_trace; @@session.optimizer_trace enabled=on,one_line=off set global optimizer_trace=0; select @@global.optimizer_trace; @@global.optimizer_trace enabled=off,one_line=off set session optimizer_trace=0; select @@session.optimizer_trace; @@session.optimizer_trace enabled=off,one_line=off set session optimizer_trace=default; select @@session.optimizer_trace; @@session.optimizer_trace enabled=off,one_line=off set global optimizer_trace=1.1; ERROR 42000: Incorrect argument type to variable 'optimizer_trace' set global optimizer_trace=1e1; ERROR 42000: Incorrect argument type to variable 'optimizer_trace' set session optimizer_trace="foobar"; ERROR 42000: Variable 'optimizer_trace' can't be set to the value of 'foobar' SET @@global.optimizer_trace = @start_global_value; SELECT @@global.optimizer_trace; @@global.optimizer_trace enabled=off,one_line=off