I've been trying to create a simple BEFORE INSERT trigger on a database table (MySQL v 5.7 ) but I keep receiving a vague "#1064 ... syntax error" message which doesn't help resolve the issue.
Here's the SQL:
CREATE OR REPLACE TRIGGER `CREATE_QUIZ_TRIG` BEFORE INSERT ON `quiz`
FOR EACH ROW BEGIN
SET NEW.ACTIVE = UPPER(NEW.ACTIVE);
SET NEW.CREATED = NOW();
END
/
All I'm trying to do is enforce a column to uppercase and then insert the current date & time into a timestamp column. I've been following the documentation from:
https://dev.mysql.com/doc/refman/5.7/en/trigger-syntax.html
and realise that for multi-statement expression I have to redefine the delimiter at the beginning of the trigger's creation but the same '#1064' error occurs.
This is made even more confusing because when I use phpmyadmin's interface for creating the same trigger it works fine - but won't when I export the generated SQL and try to create the trigger using that!?
Thanks for any help
I didn't realise that, by default, phpmyadmin adds a ; delimiter which was breaking the ; used to end a statement within the BEGIN END block.
Related
I'm relatively new to MYSQL from an MS SQL background. Can someone please point out why I'm getting syntax errors here please? I'm sure I've done something very obviously wrong but I just can't see it:
I'm getting a missing semicolon syntax error on line 8:
CREATE TRIGGER trg_InsertProductWatchListPriceHistory
AFTER UPDATE
ON ProductWatchlist FOR EACH ROW
BEGIN
INSERT INTO ProductWatchListPriceHistory
(ProductWatchlistID,Price)
VALUES
(ProductWatchlistID,New.ProductPrice);
END;
Any help greatly appreciated.
You need to change your default delimiter to something else than ;. Otherwise your definition ends at the first ; which would make it incomplete.
delimiter |
CREATE TRIGGER trg_InsertProductWatchListPriceHistory
AFTER UPDATE
ON ProductWatchlist FOR EACH ROW
BEGIN
INSERT INTO ProductWatchListPriceHistory (ProductWatchlistID, Price)
VALUES (New.ProductWatchlistID, New.ProductPrice);
END
|
delimiter ;
Please check this bash script for generating the update trigger.
This script will require the database name and table names.
While using this script please update the username and password.
If using MySQL Workbench then Editor's create trigger under table design options should be used to avoid changing delimiters before and after.
I just switched from using Apache's Derby Database to MySQL and still getting familiar with the syntax. I read the documentation about triggers and I think I followed the syntax correctly. However, I'm having problems with BEGIN and END My insert trigger below doesn't work if I put BEGIN and ENDI even tried putting DELIMITER but it doesn't fix it.
CREATE TRIGGER COPY_INSERTED_USERID_TO_ALLUSERS_PERMISSIONS
AFTER INSERT ON ALLUSERS
FOR EACH ROW
BEGIN
INSERT INTO ALLUSERS_ADMIN_PERMISSIONS(USERID)
VALUES(NEW.USERID);
END;
Removing the BEGIN and END makes it work but I'm not able to take full advantage of the compound statements.
CREATE TRIGGER COPY_INSERTED_USERID_TO_ALLUSERS_PERMISSIONS
AFTER INSERT ON ALLUSERS
FOR EACH ROW
INSERT INTO ALLUSERS_ADMIN_PERMISSIONS(USERID)
VALUES(NEW.USERID);
I'd appreciate any help.
Thanks.
Edited:
I tried to follow #Ilanatos advice which works but returns an error on first attempt. I had to refresh the phpmyadmin page to get rid of the error.
Below are the screenshots.
then if I refresh the page(both Firefox and Chrome), I see the trigger.
I don't think it should return an error message during execution of create trigger definition.
Try using the delimiter function when creating your trigger.
DELIMITER $$
CREATE TRIGGER COPY_INSERTED_USERID_TO_ALLUSERS_PERMISSIONS
AFTER INSERT ON ALLUSERS
FOR EACH ROW BEGIN
INSERT INTO ALLUSERS_ADMIN_PERMISSIONS(USERID)
VALUES(NEW.USERID);
END$$
DELIMITER ;
I am trying to create a trigger in mysql using the following:
CREATE TRIGGER ins_daft BEFORE INSERT ON jos_ezrealty
FOR EACH ROW BEGIN
SET preschool = livingarea*10.76391041671
END;
When I do I get the following error:
Error
SQL query:
CREATE TRIGGER ins_daft BEFORE INSERT ON jos_ezrealty
FOR EACH
ROW BEGIN
SET preschool = livingarea * 10.76391041671 END
MySQL said: Documentation
#1193 - Unknown system variable 'preschool'
I am trying to have the value of one field converted to square feet by multiplying by 10.76391041671. Can anyone see what I am doing wrong?
Thank you.
Any time you want to reference the columns of a row that fired the trigger, qualify them like NEW.column_name.
Otherwise the SET command thinks you want to set a MySQL configuration variable called preschool.
I have searched for all the possible online solutions but I can't figure out the error in this trigger.
CREATE TRIGGER `delete_neat_link`
AFTER DELETE ON `neat_urls`
FOR EACH ROW
BEGIN
DELETE FROM `css_paths`
WHERE `css_paths`.`path_id` = OLD.`neat_link`;
END;
the first error appears at OLD.neat_link
syntax error, unexpected END_OF_INPUT, expecting ';'
and the second one at END;
syntax error, unexpected END
Any help would be appreciable, thanks.
That problem is due to interpreting individual statements. The CREATE TRIGGER statement is as such a single complete statement that must be sent as is to the server. Usually statement borders are recognized by the default delimiter (the semicolon). In case of stored programs however the semicolon is needed to separate inner statements. This would confuse the client as it cannot tell apart what is an inner statement of the stored program or a full statement as it must be sent as a whole to the server.
Hence the DELIMITER statement was introduced which only applies to clients (not the server, the server itself cannot parse this statement). It changes the default delimiter to one of your choice, leading so the client where to look for the statement's end. A typical case hence looks like this:
DELIMITER ;;
CREATE TRIGGER `ins_film` AFTER INSERT ON `film` FOR EACH ROW BEGIN
INSERT INTO film_text (film_id, title, description)
VALUES (new.film_id, new.title, new.description);
END;;
Their is only one statement in the body of the Trigger, so there is no need to use the BEGIN-END compound statement construct. Try this:
CREATE TRIGGER `delete_neat_link`
AFTER DELETE ON `neat_urls`
FOR EACH ROW
DELETE FROM `css_paths`
WHERE `css_paths`.`path_id` = OLD.`neat_link`
another possible solution
DELIMITER $$
CREATE TRIGGER `delete_neat_link`
AFTER DELETE ON `neat_urls`
FOR EACH ROW
BEGIN
DELETE FROM `css_paths`
WHERE `css_paths`.`path_id` = OLD.`neat_link`;
END$$
DELIMITER ;
I can't figure out why this trigger creation syntax fails:
CREATE TRIGGER mytrigger BEFORE UPDATE ON mytable
FOR EACH ROW
BEGIN
IF NEW.col1 = 0 AND NEW.col2 != '' AND NEW.col3 > 0 THEN
SET NEW.col1 = NEW.col3 - (10 * 60);
END IF;
END;
MySQL says there's a syntax error at line 5, just before/on the SET statement. I'm using MySQL 5.0.27. I can't see what's wrong, seeing as it's pretty much identical to the example given in the manual 3/4s down.
PS: I'm entering this in the SQL tab on PhpMyAdmin. Adding "delimiter" statements doesn't help. Any clues? Thanks in advance!
I found it. Apparently PhpMyAdmin ignores MySQL's delimiter command when entered as part of an SQL query. Instead, you need to set the delimiter in a separate form field below the SQL query. I totally missed that!