select @@global.ft_stopword_file; @@global.ft_stopword_file (built-in) select @@session.ft_stopword_file; ERROR HY000: Variable 'ft_stopword_file' is a GLOBAL variable show global variables like 'ft_stopword_file'; Variable_name Value ft_stopword_file (built-in) show session variables like 'ft_stopword_file'; Variable_name Value ft_stopword_file (built-in) select * from information_schema.global_variables where variable_name='ft_stopword_file'; VARIABLE_NAME VARIABLE_VALUE FT_STOPWORD_FILE (built-in) select * from information_schema.session_variables where variable_name='ft_stopword_file'; VARIABLE_NAME VARIABLE_VALUE FT_STOPWORD_FILE (built-in) set global ft_stopword_file=1; ERROR HY000: Variable 'ft_stopword_file' is a read only variable set session ft_stopword_file=1; ERROR HY000: Variable 'ft_stopword_file' is a read only variable