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Pause a MySQL query with sleep

Snippet kitt decided around 23:17 on 16 January 2010 to publish this:

For MySQL > 5.0.12, execution of a series of queries can be delayed / paused by using SELECT SLEEP(), which is useful when a previous query needs to be paused, say, when a slave is reconnecting to a master.

-- delay a query by one second
SELECT SLEEP(1);
 
-- delay a series of queries by a 30 seconds
SELECT SLEEP(30);
 
-- stop the slave, skip the error SQL, start the slave, pause a second, then check the slave status
STOP SLAVE; SET GLOBAL SQL_SLAVE_SKIP_COUNTER = 1; START SLAVE; SELECT SLEEP(1); SHOW SLAVE STATUS;
Source: 
Putting a MySQL query to sleep
#mysql
#sleep

Comments

Submitted by Anonymous (not verified) on Thu, 2016-03-10 06:01

If you use DO SLEEP(x) it will be possible to use it in places where you cannot have select statements. Also you do not get unnecessary outputs from the SELECT SLEEP() statements.