1SET @start_value = @@global.general_log_file; 2SELECT length(@start_value) > 0; 3length(@start_value) > 0 41 5'#---------------------FN_DYNVARS_004_01-------------------------#' 6SET @@global.general_log_file = DEFAULT; 7SELECT length(@@global.general_log_file) > 0; 8length(@@global.general_log_file) > 0 91 10'#--------------------FN_DYNVARS_004_02------------------------#' 11SET @@global.general_log_file = mytest.log; 12ERROR 42000: Incorrect argument type to variable 'general_log_file' 13SET @@global.general_log_file = 12; 14ERROR 42000: Incorrect argument type to variable 'general_log_file' 15SET @@global.general_log_file = 'my.cnf'; 16ERROR 42000: Variable 'general_log_file' can't be set to the value of 'my.cnf' 17SET @@global.general_log_file = '/tmp/my.cnf'; 18ERROR 42000: Variable 'general_log_file' can't be set to the value of '/tmp/my.cnf' 19SET @@global.general_log_file = '.my.cnf'; 20ERROR 42000: Variable 'general_log_file' can't be set to the value of '.my.cnf' 21SET @@global.general_log_file = 'my.cnf\0foo'; 22ERROR 42000: Variable 'general_log_file' can't be set to the value of 'my.cnf' 23SET @@global.general_log_file = 'my.ini'; 24ERROR 42000: Variable 'general_log_file' can't be set to the value of 'my.ini' 25'#----------------------FN_DYNVARS_004_03------------------------#' 26SELECT @@global.general_log_file = VARIABLE_VALUE 27FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 28WHERE VARIABLE_NAME='general_log_file'; 29@@global.general_log_file = VARIABLE_VALUE 301 31SET @@global.general_log_file= @start_value; 32