my schema is middleweight(mname, mwins, mlosses, mdraws, mweight, mcountry, mage, mheight)
I am completely lost cant seem to find the problem.
delimiter//
CREATE TRIGGER tr_middlewegiht_u
BEFORE update on middleweight
for each row
begin
IF (new.mweight>185) THEN
SIGNAL sqlstate '45000'
set message_text = 'The fighters in the wrong weight class.';
END if;
END//
delimiter;
You should maintain a space between 'delimiter' key word and its values '//', and ';'
Unless which it is a 1064 syntax error.
Example:
delimiter // -- <--- observe the space here. It is a MUST
-- your trigger definition
end;
//
delimiter ; -- <--- maintain space here too. This too is a MUST
Related
I am trying to put a constraint on a database where if generic_asset.type = 'raw' then generic_asset.atomic = 1 must be maintained. For this I wrote the following trigger of type BEFORE INSERT. Here is the snippet:
DELIMITER //
CREATE TRIGGER generic_asset_check BEFORE INSERT ON generic_asset FOR EACH ROW
BEGIN
IF NEW.type = 'raw' THEN
BEGIN
IF NEW.atomic = 0 THEN
SET SQLSTATE = 'Sorry cannot insert';
END IF;
END IF;
END //
DELIMITER ;
Error is like:
#1064 - syntax error near 'SQLSTATE = 'Sorry cannot insert';
END IF;
END IF;
END' in line 6
(translated from French).
I tried various syntax but all seam not to work and also knowing that my changes are so little like changing double quotes, removing BEGIN with END IF;... So I know these turns are irreverent.
I revised syntax in many internet resources and official documentation, nothing helped.
MySQL's IF statement does not take a BEGIN keyword. Also, if you want to raise an error from within the trigger, you need SIGNAL. Finally, these two nested conditions can be flattened.
Consider:
DELIMITER //
CREATE TRIGGER generic_asset_check BEFORE INSERT ON generic_asset FOR EACH ROW
BEGIN
IF NEW.type = 'raw' AND NEW.atomic = 0 THEN
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Sorry cannot insert';
END IF;
END //
DELIMITER ;
Demo on DB Fiddle
I dont want anyone to be able to update thier Name to certain values and cancel the update if it is attempting to update the PLayername to "Error", and need to prevent it at the database level.
I figured I could simply do this with a trigger, so I tried making one here.
delimiter $$
create trigger errorcheck before insert on player_data
for each row
begin
if new.PlayerName = 'Error' then
signal sqlstate '45000';
end if;
end;$$
but the server responds with this 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 '$$' at line 7
Thank you for any help / suggestions
delimiter $$
create trigger errorcheck before insert on player_data
for each row
begin
if new.PlayerName = 'Error' then
signal sqlstate '45000';
end if;
end;
I dont understand why but removing the $$ delimeter at the end saved the trigger and i tested it and it works how i wanted it to.
I'm trying to create a trigger to validate an email address in a customer table, but am getting the error
syntax error, unexpected END, expecting ';'
My code is as follows:
CREATE TRIGGER insert_validation_email
BEFORE INSERT ON customer FOR EACH ROW
BEGIN
IF (NEW.CustomerEmail NOT REGEXP '^[^#]+#[^#]+\.[^#]{2,}$')
THEN
SIGNAL SQLSTATE '45000'
SET MESSAGE_TEXT = 'Cannot add or update row: invalid email address'
END* IF
END
END* is where it is underlined with the error (the asterisk is not there)
There are other validation triggers which will be included, so the begin and end statement is needed
Fixed by changing delimiter and putting ; after if block and final END. Thanks Gordon Linoff and a_horse_with_no_name for helping
DELIMITER $$
CREATE TRIGGER before_insert_email
BEFORE INSERT ON customer FOR EACH ROW
BEGIN
IF (NEW.CustomerEmail NOT REGEXP '^[^#]+#[^#]+\.[^#]{2,}$')
THEN
SIGNAL SQLSTATE '45000'
SET MESSAGE_TEXT = 'Cannot add or update row: invalid email address';
END IF;
END$$
DELIMITER ;
I am having an error and I can't make sense of it. Here is the code for my trigger:
CREATE TRIGGER before_insert_test
BEFORE INSERT ON player_totals FOR EACH ROW
BEGIN
IF NEW.Player = 'Player' THEN
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'basketball-reference duplicate header';
END IF;
END;
I am getting red errors marks in MySQL workbench source code editor for 3 lines. For the line that begins SIGNAL SQLSTATE ..., It says:
Syntax Error: missing 'semicolon'
For the line that reads END IF;, the error says:
Syntax error: END (end) is not valid input as this position.
For the line that reads END;, the error says:
Extraneous input found - expected end of statement
Just not sure how to fix these errors, from what I've seen this looks like the correct syntax...
Try this one, with $$ after END
DELIMITER $$
CREATE TRIGGER before_insert_test
BEFORE INSERT ON player_totals
FOR EACH ROW
BEGIN
IF NEW.Player = 'Player' THEN
SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'basketball-reference duplicate header';
END IF;
END; $$
DELIMITER ;
CREATE TRIGGER test BEFORE INSERT ON MYTABLE
FOR EACH ROW
BEGIN
IF break < 0 THEN
SIGNAL sqlstate '45000'
set message_text = 'ERROR';
END IF;
END;
This throws a syntax error and I'm not able to find it.
You need to change the delimiter that MySQL is using as an end-of-line marker. You need to do this for CREATE TRIGGER and CREATE PROCEDURE because if you don't MySQL will treat the first semi-colon as the end of the command and finish processing it prematurely - hence the syntax error.
Do this:
DELIMITER $$
CREATE TRIGGER test BEFORE INSERT ON MYTABLE
FOR EACH ROW
BEGIN
IF break < 0 THEN
SIGNAL sqlstate '45000'
set message_text = 'ERROR';
END IF;
END$$
DELIMITER ;
Now, MySQL will continue processing your CREATE TRIGGER command until it reaches $$, and include the semi-colons as part of the trigger script. Note that I've set the delimiter back to semicolon when I'm finished.