# ulong session

SET @start_global_value = @@global.deadlock_search_depth_short;

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

#
# show that it's writable
#
set global deadlock_search_depth_short=10;
select @@global.deadlock_search_depth_short;
set session deadlock_search_depth_short=10;
select @@session.deadlock_search_depth_short;

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

#
# min/max values, block size
#
set global deadlock_search_depth_short=0;
select @@global.deadlock_search_depth_short;
set session deadlock_search_depth_short=cast(-1 as unsigned int);
select @@session.deadlock_search_depth_short;

SET @@global.deadlock_search_depth_short = @start_global_value;

