# 2012-05-29 - Added # --source include/have_innodb.inc SET @start_global_value = @@global.innodb_compression_level; SELECT @start_global_value; # # exists as global only # --echo Valid value 0-9 select @@global.innodb_compression_level <= 9; select @@global.innodb_compression_level; --error ER_INCORRECT_GLOBAL_LOCAL_VAR select @@session.innodb_compression_level; show global variables like 'innodb_compression_level'; show session variables like 'innodb_compression_level'; select * from information_schema.global_variables where variable_name='innodb_compression_level'; select * from information_schema.session_variables where variable_name='innodb_compression_level'; # # show that it's writable # set global innodb_compression_level=2; select @@global.innodb_compression_level; select * from information_schema.global_variables where variable_name='innodb_compression_level'; select * from information_schema.session_variables where variable_name='innodb_compression_level'; --error ER_GLOBAL_VARIABLE set session innodb_compression_level=4; # # incorrect types # --error ER_WRONG_TYPE_FOR_VAR set global innodb_compression_level=1.1; --error ER_WRONG_TYPE_FOR_VAR set global innodb_compression_level=1e1; --error ER_WRONG_TYPE_FOR_VAR set global innodb_compression_level="foo"; set global innodb_compression_level=10; select @@global.innodb_compression_level; select * from information_schema.global_variables where variable_name='innodb_compression_level'; set global innodb_compression_level=-7; select @@global.innodb_compression_level; select * from information_schema.global_variables where variable_name='innodb_compression_level'; # # min/max values # set global innodb_compression_level=0; select @@global.innodb_compression_level; set global innodb_compression_level=9; select @@global.innodb_compression_level; # # cleanup # SET @@global.innodb_compression_level = @start_global_value; SELECT @@global.innodb_compression_level;