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--source include/have_innodb.inc SET @start_global_value = @@global.innodb_status_output; SELECT @start_global_value; # # exists as global only # --echo Valid values are 'ON' and 'OFF' select @@global.innodb_status_output in (0, 1); select @@global.innodb_status_output; --error ER_INCORRECT_GLOBAL_LOCAL_VAR select @@session.innodb_status_output; show global variables like 'innodb_status_output'; show session variables like 'innodb_status_output'; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_status_output'; select * from information_schema.session_variables where variable_name='innodb_status_output'; --enable_warnings # # show that it's writable # set global innodb_status_output='OFF'; select @@global.innodb_status_output; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_status_output'; select * from information_schema.session_variables where variable_name='innodb_status_output'; --enable_warnings set @@global.innodb_status_output=1; select @@global.innodb_status_output; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_status_output'; select * from information_schema.session_variables where variable_name='innodb_status_output'; --enable_warnings set global innodb_status_output=0; select @@global.innodb_status_output; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_status_output'; select * from information_schema.session_variables where variable_name='innodb_status_output'; --enable_warnings set @@global.innodb_status_output='ON'; select @@global.innodb_status_output; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_status_output'; select * from information_schema.session_variables where variable_name='innodb_status_output'; --enable_warnings --error ER_GLOBAL_VARIABLE set session innodb_status_output='OFF'; --error ER_GLOBAL_VARIABLE set @@session.innodb_status_output='ON'; # # incorrect types # --error ER_WRONG_TYPE_FOR_VAR set global innodb_status_output=1.1; --error ER_WRONG_TYPE_FOR_VAR set global innodb_status_output=1e1; --error ER_WRONG_VALUE_FOR_VAR set global innodb_status_output=2; --error ER_WRONG_VALUE_FOR_VAR set global innodb_status_output=-3; select @@global.innodb_status_output; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_status_output'; select * from information_schema.session_variables where variable_name='innodb_status_output'; --enable_warnings set global innodb_status_output=DEFAULT; select @@global.innodb_status_output; --disable_warnings select * from information_schema.global_variables where variable_name='innodb_status_output'; select * from information_schema.session_variables where variable_name='innodb_status_output'; --enable_warnings --error ER_WRONG_VALUE_FOR_VAR set global innodb_status_output='AUTO'; # # Cleanup # SET @@global.innodb_status_output = @start_global_value; SELECT @@global.innodb_status_output;