mysql event cannot call procedures to partition database - mysql

Question

Have anyone faced the same problem as mine ? please kindly help !!
I have two procedures and one event, the procedures are working just fine when I call them separately from the command line.
But those procedures can not be called from inside the mysql event.
Below are my procedures, mysql event and how I check the effective result:
USE ims_db;
DELIMITER;
DROP PROCEDURE IF EXISTS CreatePartition$$
CREATE PROCEDURE CreatePartition(day_keep_data INT)
BEGIN
DECLARE partition_temp TEXT;
DECLARE partition_name CHAR(12);
DECLARE partition_threshold INT DEFAULT 0;
DECLARE day_temp INT;
SET day_temp = day_keep_data;
SET #sql = concat('ALTER TABLE ims_db.ims_counter PARTITION BY RANGE(trigger_time)(');
loop_change_partition: LOOP
IF day_temp <= 0 THEN
LEAVE loop_change_partition;
END IF;
SET day_temp = day_temp - 1;
SET partition_threshold = UNIX_TIMESTAMP() - 86400*day_temp;
SET partition_name = concat('p', CURRENT_DATE() - INTERVAL day_temp DAY + 0);
SET partition_temp = concat('PARTITION', partition_name, ' VALUES LESS THAN (', partition_threshold,'), ');
SET #sql = concat(#sql, partition_temp);
END LOOP loop_change_partition;
SET partition_name = concat('p', CURRENT_DATE() + INTERVAL 1 DAY + 0);
SET partition_temp = concat('PARTITION', partition_name, ' VALUES LESS THAN MAXVALUE);');
SET #sql = concat(#sql, partition_temp);
prepare stmt from #sql;
execute stmt;
deallocate prepare stmt;
END$$
DELIMITER ;
DELIMITER $$
DROP PROCEDURE IF EXISTS DeleteOldData$$
CREATE PROCEDURE DeleteOldData(day_keep_data INT)
BEGIN
SET #sql = concat('DELETE FROM ims_db.ims_counter WHERE ims_db.ims_counter.id > 0
AND ims_db.ims_counter.trigger_time < ', UNIX_TIMESTAMP() - 86400*day_keep_data);
prepare stmt from #sql;
execute stmt;
deallocate prepare stmt;
ALTER TABLE ims_counter REMOVE PARTITIONING;
END$$
DELIMITER ;
-- DELIMITER $$
-- CREATE FUNCTION ims_daily_work() RETURNS INT(11)
-- BEGIN
-- CALL DeleteOldData(30);
-- CALL CreatePartition(30);
-- END $$
-- DELIMITER ;
DELIMITER $$
CREATE EVENT IMSDailyWork
ON SCHEDULE EVERY 30 SECOND STARTS CURRENT_TIMESTAMP + INTERVAL 10 SECOND
DO
BEGIN
CALL DeleteOldData(30);
CALL CreatePartition(30);
-- SELECT ims_daily_work();
END$$
DELIMITER ;
How I check the effective result:
run command: show table status like 'ims_counter'\G -> check Create_options: -> it is null
after running all the above event and procedures -> check again Create_options: -> it should be 'partitioned', but my problem is there's no such 'partitioned' like that.

Answer 1

I found the solution: it is because my 'event_scheduler' is OFF, so no EVENT can be launched.
to check event status: show global variables like 'event_scheduler';
to enable event_scheduler: set global event_scheduler=1;