Syntax
------ 
DROP EVENT [IF EXISTS] event_name
 
Description
----------- 
This statement drops the event named event_name. The event
immediately
ceases being active, and is deleted completely from the
server.
 
If the event does not exist, the error
ERROR 1517 (HY000): Unknown event 'event_name'
results. You can override this and cause the
statement to generate a NOTE for non-existent events instead
by using
IF EXISTS. See SHOW WARNINGS.
 
This statement requires the EVENT privilege. In MySQL 5.1.11
and earlier, an event could be dropped only
by its definer, or by a user having the SUPER privilege.
 
Examples
-------- 
DROP EVENT myevent3;
 
Using the IF EXISTS clause:
 
DROP EVENT IF EXISTS myevent3;
 
Query OK, 0 rows affected, 1 warning (0.01 sec)
 
SHOW WARNINGS;
 
+-------+------+-------------------------------+
| Level | Code | Message |
+-------+------+-------------------------------+
| Note | 1305 | Event myevent3 does not exist |
+-------+------+-------------------------------+
 


URL: https://mariadb.com/kb/en/drop-event/