#
# only global
#
select @@global.large_files_support;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
select @@session.large_files_support;
show global variables like 'large_files_support';
show session variables like 'large_files_support';
select * from information_schema.global_variables where variable_name='large_files_support';
select * from information_schema.session_variables where variable_name='large_files_support';

#
# show that it's read-only
#
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
set global large_files_support=1;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
set session large_files_support=1;