From: Martijn Tonies
Date: December 5 2008 8:14pm
Subject: Re: Trying to Create a Trigger
List-Archive: http://lists.mysql.com/mysql/215497
Message-Id: <031601c95716$0e1712e0$9c02a8c0@martijnws>
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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;

Try:

end; //
delimiter ;



I just wrote the trigger source in the Trigger Editor in Database Workbench
and it doesn't bother about delimiters and such...

It also has no ";" after the final END, but hey, who knows ;-)

With regards,

Martijn Tonies
Upscene Productions
http://www.upscene.com

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