SET @start_global_value = @@global.deadlock_search_depth_short;
select @@global.deadlock_search_depth_short;
@@global.deadlock_search_depth_short
4
select @@session.deadlock_search_depth_short;
@@session.deadlock_search_depth_short
4
show global variables like 'deadlock_search_depth_short';
Variable_name	Value
deadlock_search_depth_short	4
show session variables like 'deadlock_search_depth_short';
Variable_name	Value
deadlock_search_depth_short	4
select * from information_schema.global_variables where variable_name='deadlock_search_depth_short';
VARIABLE_NAME	VARIABLE_VALUE
DEADLOCK_SEARCH_DEPTH_SHORT	4
select * from information_schema.session_variables where variable_name='deadlock_search_depth_short';
VARIABLE_NAME	VARIABLE_VALUE
DEADLOCK_SEARCH_DEPTH_SHORT	4
set global deadlock_search_depth_short=10;
select @@global.deadlock_search_depth_short;
@@global.deadlock_search_depth_short
10
set session deadlock_search_depth_short=10;
select @@session.deadlock_search_depth_short;
@@session.deadlock_search_depth_short
10
set global deadlock_search_depth_short=1.1;
ERROR 42000: Incorrect argument type to variable 'deadlock_search_depth_short'
set session deadlock_search_depth_short=1e1;
ERROR 42000: Incorrect argument type to variable 'deadlock_search_depth_short'
set global deadlock_search_depth_short="foo";
ERROR 42000: Incorrect argument type to variable 'deadlock_search_depth_short'
set global deadlock_search_depth_short=0;
select @@global.deadlock_search_depth_short;
@@global.deadlock_search_depth_short
0
set session deadlock_search_depth_short=cast(-1 as unsigned int);
Warnings:
Note	1105	Cast to unsigned converted negative integer to it's positive complement
Warning	1292	Truncated incorrect deadlock_search_depth_short value: '18446744073709551615'
select @@session.deadlock_search_depth_short;
@@session.deadlock_search_depth_short
32
SET @@global.deadlock_search_depth_short = @start_global_value;
