I try to create a trigger from the SQL console of PhpMyAdmin but the navigator loads infinitely
DELIMITER |
CREATE TRIGGER before_insert_history BEFORE INSERT
ON history FOR EACH ROW
BEGIN
INSERT INTO newsfeed(user_ID, date_action, action, pg_ID, rk_ID, vote)
VALUES (NEW.user_ID, NOW(), "vote", NEW.page_ID, NEW.ranking_ID, SELECT IF(NEW.liked='1','1','-1') AS vote );
END |
DELIMITER ;
After a certain time I have this error : Fatal error: Maximum execution time of 300 seconds exceeded in C:\wamp\apps\phpmyadmin3.2.0.1\libraries\import\sql.php on line 259
Maybe it's a delimiter issue, yet I choosed ";" in the delimiter field on the bottom of console.
delimiter is a MySQL client command, not SQL. I believe you need to choose | as your delimiter from the drop-down box on PHPMyAdmin's SQL tab, then use the same code you posted here without the delimiter commands.
I just tried a simple statement within delimiter commands, and although the first delimiter command didn't seem to do much, the second one causes it to hang. Removing it solved it in my case.
CREATE TRIGGER before_insert_history BEFORE INSERT
ON history FOR EACH ROW
BEGIN
INSERT INTO newsfeed(user_ID, date_action, action, pg_ID, rk_ID, vote)
VALUES (NEW.user_ID, NOW(), "vote", NEW.page_ID, NEW.ranking_ID, SELECT IF(NEW.liked='1','1','-1') AS vote );
END |
Related
unable to write a trigger to insert a row if no imei found in the triggered table if found then it should update the record.
query error - lost connection to my sql server.
DELIMITER $$
create TRIGGER update_livedata4
AFTER INSERT ON `Rawdata`
FOR EACH ROW
begin
IF Livedata.IMEI <> Rawdata.IMEI THEN
INSERT INTO Livedata(IMEI,updatedTime,latitude,longitude,speed,ignition,fuel,altitude,battery,runHrs,alert,distance) VALUES (NEW.IMEI,NEW.updatedTime, NEW.latitude,NEW. longitude,NEW.speed,NEW.ignition,NEW.fuel,NEW.altitude,NEW.battery,NEW.runHrs,NEW.alert,NEW.distance);
END IF;
UPDATE Livedata SET IMEI = new.IMEI,updatedTime=new.updatedTime,latitude= NEW.latitude,longitude=NEW. longitude,speed=NEW.speed,ignition=NEW.ignition,fuel=NEW.fuel,altitude=NEW.altitude,battery=NEW.battery,runHrs=NEW.runHrs,alert=NEW.alert,distance=NEW.distance;
END$$
DELIMITER ;
It seems that you are missing where clause in the update that you have written which in turn takes more than your net read timeout....!
Are you willing to update all the records?
If that is the case then increasing the timeout would help...
we are having a problem with the created_at on a WordPress system. Somehow some users get that field updated "randomly" to an invalid value, so it get's set as '00000000' datetime. We haven't found the cause on the WP code, and we are now analizing the few plugins the project has. It has a large Code and user base, so we thought it might be faster to use a MySQL trigger to catch this "random" updates.
The thing is we somehow keep on hitting a syntax error on or Trigger code, and lame SQLer's as we are, we need help trying to figure out what it could be.
What we are tying to accomplish is:
Detect when the user table gets updated
Check if the created_at row has been modified
Insert the old data into a new table we created just for this purpose (user_registration_changed_records).
We decided to check for each row just in case there is some weird behaviour going on.
DELIMITER $$
CREATE TRIGGER `user_register_updated` BEFORE UPDATE ON `wp_t8y31tcd9u_users`
FOR EACH ROW
BEGIN
IF OLD.created_at != NEW.created_at
INSERT INTO user_registration_change_records (user_id, created_at) VALUES (OLD.ID, OLD.created_at)
END IF;
END;$$
DELIMITER ;
Thanks in advance for any suggestions!
Syntax Error
#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INSERT INTO user_registration_change_records (user_id, created_at) VALUES (OLD.I' at line 6
You have a couple of syntax errors:
missing then keyword before the insert (this is the one the error message relates to)
missing ; after the insert's row
extra ; after the end
At least these are the ones I can see.
DELIMITER $$
CREATE TRIGGER `user_register_updated` BEFORE UPDATE ON `wp_t8y31tcd9u_users`
FOR EACH ROW
BEGIN
IF OLD.created_at != NEW.created_at THEN
INSERT INTO user_registration_change_records (user_id, created_at) VALUES (OLD.ID, OLD.created_at);
END IF;
END$$
DELIMITER ;
It is worthwile using mysql manual on compound statement syntax because all these can be found there.
Could anyone tell me that what is the syntax error in this trigger
DELIMITER |
CREATE TRIGGER User_XEntity_Before_Delete
BEFORE DELETE
ON UserXEntity FOR EACH ROW
BEGIN
-- Insert record into Delete_UserXEntity table
INSERT INTO Delete_UserXEntity
( DeletedUserXEntityId,
UserId,
CreatedAt)
VALUES
( OLD.Id,
OLD.UserId,
NOW() );
END;
|
DELIMITER ;
I've got the solution. Actually I was entering this code in phpmyadmin Trigger window, where it asks about table name, time and event already. So we only need to write the trigger action code in that window. I was writing the whole trigger code and that's why I was giving me a syntax error.
We only need to write the following code in PHPMYADMIN add new trigger windows:
INSERT INTO Delete_UserXEntity
( DeletedUserXEntityId,
UserId,
CreatedAt)
VALUES
( OLD.Id,
OLD.UserId,
NOW() );
In MySQL I tried to define a trigger like this:
DELIMITER $$
CREATE TRIGGER vipInvite
AFTER INSERT ON meetings
FOR EACH ROW
BEGIN
IF(NOT EXISTS (SELECT * FROM participants
WHERE meetid = NEW.meetid AND pid ='vip'))
THEN
IF(EXISTS(SELECT * FROM meetings WHERE meetid = NEW.meetid AND slot > 16))
THEN
INSERT INTO participants(meetid, pid)
VALUES (NEW.meetid,(SELECT userid
FROM people WHERE people.group = 'tap' GROUP BY invite));
END IF;
END IF;
END $$
DELIMITER ;
Produces this error:
This version of MySQL doesn't yet support 'multiple triggers with the same action time and event for one table.
Is there a way to work around this so I can define multiple triggers?
This error means you already have an AFTER INSERT trigger on meetings table.
If it is the same trigger (meaning vipInvite) that you created earlier and now you want to replace it then you need to drop it first
DROP TRIGGER vipInvite;
DELIMITER $$
CREATE TRIGGER vipInvite
...
END$$
DELIMITER ;
Now if you have some other trigger you have to merge code from both triggers into one, then drop existing trigger, and then create a new one.
To show the list of existing triggers use SHOW TRIGGERS.
SHOW TRIGGERS WHERE `table` = 'meetings';
How to reproduce this error in MySQL:
ERROR 1235 (42000): This version of MySQL doesn't yet support 'multiple
triggers with the same action time and event for one table'
Run the following queries:
DELIMITER //
CREATE TRIGGER mytrigger1 AFTER INSERT ON mytable
FOR EACH ROW
BEGIN
END//
DELIMITER //
CREATE TRIGGER mytrigger2 AFTER INSERT ON mytable
FOR EACH ROW
BEGIN
END//
If you want to hook more than one action onto the same event/table, you will have to cram all of it into one trigger. You could call many stored procedures like this:
DELIMITER //
CREATE TRIGGER mytrigger1 AFTER INSERT ON mytable
FOR EACH ROW
BEGIN
CALL fromulate_the_moobars(NEW.myid);
CALL its_peanut_butter_jelly_time(NEW.myname);
END//
So I am trying to create trigger that will only execute when a specific column within a table is updated. The table in question is track the column in question is track.track_hits. What I want to do is if that value changes then it inserts a value into a table called play_log. The insert should be the track_id from track and a timestamp.
The code I have done so far is below but it doesn't work, how can it be fixed?
CREATE TRIGGER pi_play AFTER UPDATE ON track
FOR EACH ROW
BEGIN
if :new.track_hits != :old.track_hits
then
INSERT INTO play_log (track_id,access_time)
VALUES (NEW.track_id, NOW())
end if;
END;
NEW and OLD do not need : in front. Also, when creating triggers, you may need to change the delimiter. If you don't change the delimiter, your create trigger statement may be terminated early.
Here's how I would do it:
delimiter |
create trigger pi_play after update on track
for each row
begin
if new.track_hits != old.track_hits then
insert into play_log(track_id, access_time) values (new.track_id, now());
end if;
end|
delimiter ;
Here's the fiddle showing it in action: http://sqlfiddle.com/#!2/3d99d/1 Notice that I changed the delimiter in the schema window to | instead of the default ;. Since SQL uses JDBC and JDBC doesn't take the command DELIMITER, I chose the delimiter.