Here's what I'm trying to do:
When there's a new INSERT into the table ACCOUNTS, I need to update the row in ACCOUNTS where pk = NEW.edit_on by setting status='E' to denote that the particular (old) account has been edited.
DELIMITER $$
DROP TRIGGER IF EXISTS `setEditStatus`$$
CREATE TRIGGER `setEditStatus` AFTER INSERT on ACCOUNTS
FOR EACH ROW BEGIN
update ACCOUNTS set status='E' where ACCOUNTS.pk = NEW.edit_on ;
END$$
DELIMITER ;
The requirement is NOT that I manipulate the newly inserted column, but an already existing column with pk = NEW.edit_on
However, I can't update the same table: Can't update table ACCOUNTS ... already used by the statement that invoked this trigger
Please suggest a workaround
PS: I have already gone through Updating table in trigger after update on the same table, Insert into same table trigger mysql, Update with after insert trigger on same table and mysql trigger with insert and update after insert on table but they dont seem to answer my question.
Edit
ACCOUNTS Table:
CREATE TABLE `ACCOUNTS` (
`pk` bigint(10) unsigned NOT NULL AUTO_INCREMENT,
`user_id` bigint(9) unsigned NOT NULL,
`edit_on` bigint(10) unsigned DEFAULT NULL,
`status` varchar(1) NOT NULL DEFAULT 'A',
PRIMARY KEY (`pk`) USING BTREE) ENGINE=InnoDB AUTO_INCREMENT=2147483726 DEFAULT CHARSET=latin1
This question is related to
mysql
database-trigger
On the last entry; this is another trick:
SELECT AUTO_INCREMENT FROM information_schema.tables WHERE table_schema = ... and table_name = ...
This is how I update a row in the same table on insert
activationCode and email are rows in the table USER.
On insert I don't specify a value for activationCode, it will be created on the fly by MySQL.
Change username with your MySQL username and db_name with your db name.
CREATE DEFINER=`username`@`localhost`
TRIGGER `db_name`.`user_BEFORE_INSERT`
BEFORE INSERT ON `user`
FOR EACH ROW
BEGIN
SET new.activationCode = MD5(new.email);
END
Had the same problem but had to update a column with the id that was about to enter, so you can make an update should be done BEFORE and AFTER not BEFORE had no id so I did this trick
DELIMITER $$
DROP TRIGGER IF EXISTS `codigo_video`$$
CREATE TRIGGER `codigo_video` BEFORE INSERT ON `videos`
FOR EACH ROW BEGIN
DECLARE ultimo_id, proximo_id INT(11);
SELECT id INTO ultimo_id FROM videos ORDER BY id DESC LIMIT 1;
SET proximo_id = ultimo_id+1;
SET NEW.cassette = CONCAT(NEW.cassette, LPAD(proximo_id, 5, '0'));
END$$
DELIMITER ;
DELIMITER $$
DROP TRIGGER IF EXISTS `setEditStatus`$$
CREATE TRIGGER `setEditStatus` **BEFORE** INSERT on ACCOUNTS
FOR EACH ROW BEGIN
SET NEW.STATUS = 'E';
END$$
DELIMITER ;
Instead you can use before insert and get max pkid for the particular table and then update the maximium pkid table record.
Source: Stackoverflow.com