1select @@global.ft_stopword_file; 2@@global.ft_stopword_file 3(built-in) 4select @@session.ft_stopword_file; 5ERROR HY000: Variable 'ft_stopword_file' is a GLOBAL variable 6show global variables like 'ft_stopword_file'; 7Variable_name Value 8ft_stopword_file (built-in) 9show session variables like 'ft_stopword_file'; 10Variable_name Value 11ft_stopword_file (built-in) 12select * from information_schema.global_variables where variable_name='ft_stopword_file'; 13VARIABLE_NAME VARIABLE_VALUE 14FT_STOPWORD_FILE (built-in) 15select * from information_schema.session_variables where variable_name='ft_stopword_file'; 16VARIABLE_NAME VARIABLE_VALUE 17FT_STOPWORD_FILE (built-in) 18set global ft_stopword_file=1; 19ERROR HY000: Variable 'ft_stopword_file' is a read only variable 20set session ft_stopword_file=1; 21ERROR HY000: Variable 'ft_stopword_file' is a read only variable 22