SET @start_global_value = @@global.innodb_ft_user_stopword_table; SELECT @start_global_value; @start_global_value NULL select @@session.innodb_ft_user_stopword_table; @@session.innodb_ft_user_stopword_table NULL show global variables like 'innodb_ft_user_stopword_table'; Variable_name Value innodb_ft_user_stopword_table show session variables like 'innodb_ft_user_stopword_table'; Variable_name Value innodb_ft_user_stopword_table select * from information_schema.global_variables where variable_name='innodb_ft_user_stopword_table'; VARIABLE_NAME VARIABLE_VALUE INNODB_FT_USER_STOPWORD_TABLE select * from information_schema.session_variables where variable_name='innodb_ft_user_stopword_table'; VARIABLE_NAME VARIABLE_VALUE INNODB_FT_USER_STOPWORD_TABLE set session innodb_ft_user_stopword_table='Salmon'; ERROR 42000: Variable 'innodb_ft_user_stopword_table' can't be set to the value of 'Salmon' set @@session.innodb_ft_user_stopword_table='Salmon'; ERROR 42000: Variable 'innodb_ft_user_stopword_table' can't be set to the value of 'Salmon' set global innodb_ft_user_stopword_table=1.1; ERROR 42000: Incorrect argument type to variable 'innodb_ft_user_stopword_table' set global innodb_ft_user_stopword_table=1e1; ERROR 42000: Incorrect argument type to variable 'innodb_ft_user_stopword_table' set global innodb_ft_user_stopword_table='Salmon'; ERROR 42000: Variable 'innodb_ft_user_stopword_table' can't be set to the value of 'Salmon'