1select @@global.lower_case_file_system=2; 2@@global.lower_case_file_system=2 30 4select @@session.lower_case_file_system; 5ERROR HY000: Variable 'lower_case_file_system' is a GLOBAL variable 6SELECT @@global.lower_case_file_system in (0,1); 7@@global.lower_case_file_system in (0,1) 81 9SELECT IF(@@global.lower_case_file_system, "ON", "OFF") = VARIABLE_VALUE 10FROM INFORMATION_SCHEMA.GLOBAL_VARIABLES 11WHERE VARIABLE_NAME='lower_case_file_system'; 12IF(@@global.lower_case_file_system, "ON", "OFF") = VARIABLE_VALUE 131 14SELECT IF(@@global.lower_case_file_system, "ON", "OFF") = VARIABLE_VALUE 15FROM INFORMATION_SCHEMA.SESSION_VARIABLES 16WHERE VARIABLE_NAME='lower_case_file_system'; 17IF(@@global.lower_case_file_system, "ON", "OFF") = VARIABLE_VALUE 181 19set global lower_case_file_system=1; 20ERROR HY000: Variable 'lower_case_file_system' is a read only variable 21set session lower_case_file_system=1; 22ERROR HY000: Variable 'lower_case_file_system' is a read only variable 23