Mysql regular tasks details

Mysql regular tasks

1. Check whether to open the event scheduler:

VARIABLES SHOW the LIKE  ' event_scheduler ' ; # is not open you can not enable a timer (0 for: off, 1 on behalf of: ON) 
# If you do not open the implementation of 
SET GLOBAL event_scheduler = ON; # starts a timer

2. Create EVENT event syntax:

# EXAMPLE executed once every 10 seconds, 

the CREATE the EVENT timer event name name #event
 the ON the SCHEDULE EVERY 10 SECODE # scheduled time every 10 seconds (event can set the [ Example: MONTH, DAY, SECODE, ...... ] )
 the ON COMPLETION the PRESERVE # when this event expired, event will be disable, the event will still exist but 
the ENABLE # open event scheduling 
the DO 
the cALL stored procedure name (); # operation timing of the scheduling to be performed (the above-described scheduling task call create a stored procedure execution cycle of the task) 


. Example # 12 o'clock monthly January 1 implementation of 

the cREATE EVENT timer name　　　
 ON SCHEDULE EVERY 1  mONTH STARTS DATE_ADD (DATE_ADD (DATE_SUB (CURDATE (), INTERVAL DAY (CURDATE ()) - 1  DAY ), INTERVAL 1  MONTH), The INTERVAL 12 is HOUR) # set the start time, interval time to execute
 the ON COMPLETION the PRESERVE　　　
the ENABLE 
the DO 
the CALL stored procedure name ();

Note: Stored procedures can reference one on my https://www.cnblogs.com/Moming0/p/11428960.html

3. On / Off timed event

# Enable timed event
 the ALTER EVENT timer event name ON 
COMPLETION PRESERVE ENABLE; 

# closing timing of the event 
the ALTER EVENT timer event name ON 
COMPLETION PRESERVE DISABLE;

4. Delete timed events

DROP EVENT timed event name;

Note: Navicat tool created directly refer to this article https://blog.csdn.net/tantexian/article/details/50317829