# bool global

SET @start_global_value = @@global.userstat;
#
# exists as global only
#
select @@global.userstat = 0 or @@global.userstat = 1;
--error ER_INCORRECT_GLOBAL_LOCAL_VAR
select @@session.userstat;

SET @@global.userstat=0;
show global variables like 'userstat';
show session variables like 'userstat';
select * from information_schema.global_variables where variable_name='userstat';
select * from information_schema.session_variables where variable_name='userstat';

#
# show that it's writable
#
set global userstat=ON;
select @@global.userstat;
set global userstat=OFF;
select @@global.userstat;
set global userstat=1;
select @@global.userstat;
--error ER_GLOBAL_VARIABLE
set session userstat=1;

#
# incorrect types
#
--error ER_WRONG_TYPE_FOR_VAR
set global userstat=1.1;
--error ER_WRONG_TYPE_FOR_VAR
set global userstat=1e1;
--error ER_WRONG_VALUE_FOR_VAR
set global userstat="foo";

SET @@global.userstat = @start_global_value;