SET @start_global_value = @@global.debug_binlog_fsync_sleep;
select @@global.debug_binlog_fsync_sleep;
@@global.debug_binlog_fsync_sleep
0
select @@session.debug_binlog_fsync_sleep;
ERROR HY000: Variable 'debug_binlog_fsync_sleep' is a GLOBAL variable
show global variables like 'debug_binlog_fsync_sleep';
Variable_name	Value
debug_binlog_fsync_sleep	0
show session variables like 'debug_binlog_fsync_sleep';
Variable_name	Value
debug_binlog_fsync_sleep	0
select * from information_schema.global_variables where variable_name='debug_binlog_fsync_sleep';
VARIABLE_NAME	VARIABLE_VALUE
DEBUG_BINLOG_FSYNC_SLEEP	0
select * from information_schema.session_variables where variable_name='debug_binlog_fsync_sleep';
VARIABLE_NAME	VARIABLE_VALUE
DEBUG_BINLOG_FSYNC_SLEEP	0
set global debug_binlog_fsync_sleep=20;
select @@global.debug_binlog_fsync_sleep;
@@global.debug_binlog_fsync_sleep
20
set session debug_binlog_fsync_sleep=1;
ERROR HY000: Variable 'debug_binlog_fsync_sleep' is a GLOBAL variable and should be set with SET GLOBAL
set global debug_binlog_fsync_sleep=1.1;
ERROR 42000: Incorrect argument type to variable 'debug_binlog_fsync_sleep'
set global debug_binlog_fsync_sleep=1e1;
ERROR 42000: Incorrect argument type to variable 'debug_binlog_fsync_sleep'
set global debug_binlog_fsync_sleep="foo";
ERROR 42000: Incorrect argument type to variable 'debug_binlog_fsync_sleep'
set global debug_binlog_fsync_sleep=0;
select @@global.debug_binlog_fsync_sleep;
@@global.debug_binlog_fsync_sleep
0
set global debug_binlog_fsync_sleep=cast(-1 as unsigned int);
Warnings:
Note	1105	Cast to unsigned converted negative integer to it's positive complement
Warning	1292	Truncated incorrect debug_binlog_fsync_sleep value: '18446744073709551615'
select @@global.debug_binlog_fsync_sleep;
@@global.debug_binlog_fsync_sleep
4294967295
SET @@global.debug_binlog_fsync_sleep = @start_global_value;