Martijn Tonies wrote:
Hi,
What is the exact error message?
Here's the latest query:
delimiter //
create trigger jobposts_control
before delete on jobposts for each row
begin
declare dummy varchar(255);
set @counted = (
select count(ad.adsource_id)
from adsource ad, jobposts jp
where ad.adsource_id = jp.adsource_id
and old.jobpost_id = jp.jobpost_id
);
if @counted >= 1 then SET dummy = "Cannot delete this record"; end
if;
end //
delimiter ;
Here's the error message:
ERROR: Unknown column 'old.jobpost_id' in 'where clause'
Works fine here (although with different tables).
Just for fun and giggles, have you tried OLD. (uppercase?)
Okay . . . I tried OLD.
delimiter //
create trigger jobposts_control
before delete on jobposts for each row
begin
declare dummy varchar(255);
set @counted = (
select count(ad.adsource_id)
from adsource ad, jobposts jp
where ad.adsource_id = jp.adsource_id
and OLD.jobpost_id = jp.jobpost_id
);
if @counted >= 1 then SET dummy = 'Cannot delete this record'; end if;
end //
delimiter;
Now I just have this error message:
ERROR: 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 'end //
delimiter' at line 1
Query = end
//
delimiter
As a complete sidenote:
It's better to write your JOINs with a JOIN clause and to put your
strings inside single quotes as per SQL standard, double quotes are
really for object names.
Right . . . I'll get the JOIN clause figured out after I figure out
what's causing the above error message.
--
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"In rivers, the water that you touch is the last of what has passed
and the first of that which comes; so with present time." - Leonardo da Vinci
(1452-1519)
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