--source include/not_embedded.inc

SET @start_global_value = @@global.slave_checkpoint_group;
SELECT @start_global_value;

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

#
# show that it's writable
#
set global slave_checkpoint_group=1024;
select @@global.slave_checkpoint_group;
--error ER_GLOBAL_VARIABLE
set session slave_checkpoint_group=1024;

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

#
# min/max values
#
set global slave_checkpoint_group=0;
set global slave_checkpoint_group=cast(-1 as unsigned int);

select @@global.slave_checkpoint_group as "truncated to the maximum" ;

SET @@global.slave_checkpoint_group = @start_global_value;
SELECT @@global.slave_checkpoint_group;
