select @@global.secure_file_priv; @@global.secure_file_priv MYSQLTEST_VARDIR/ select @@session.secure_file_priv; ERROR HY000: Variable 'secure_file_priv' is a GLOBAL variable show global variables like 'secure_file_priv'; Variable_name Value secure_file_priv MYSQLTEST_VARDIR/ show session variables like 'secure_file_priv'; Variable_name Value secure_file_priv MYSQLTEST_VARDIR/ select * from information_schema.global_variables where variable_name='secure_file_priv'; VARIABLE_NAME VARIABLE_VALUE SECURE_FILE_PRIV MYSQLTEST_VARDIR/ select * from information_schema.session_variables where variable_name='secure_file_priv'; VARIABLE_NAME VARIABLE_VALUE SECURE_FILE_PRIV MYSQLTEST_VARDIR/ set global secure_file_priv=1; ERROR HY000: Variable 'secure_file_priv' is a read only variable set session secure_file_priv=1; ERROR HY000: Variable 'secure_file_priv' is a read only variable