-----Original Message-----
From: Thomas Fischer [mailto:fisc...@seitenbau.net]
Sent: den 2 mars 2009 14:27
To: Apache Torque Users List
Subject: RE: Multiple addJoin with OR
> I want to create an SQLQuery that combines data from three tables. Right
> now, my javacode looks like this:
>
> Criteria.addJoin(TableA.id, TableB.fk);
> Criteria.addJoin(TableA.id, TableC.fk);
>
> This results in this SQL query:
>
> WHERE TableA.id = TableB.fk
>
> AND TableA.id = TableC.fk
>
> However, this is not the result I need. What I need is a query with OR
> instead of AND, like this:
>
> WHERE TableA.id = TableB.fk
>
> OR TableA.id = TableC.fk
>
> I haven't found any way to do this using criteria. Is it possible?
I do not know a way to do this currently. But are you really sure your
statement makes sense ? If one row in table B matches, then you get all
rows of table C joined (or vice versa), and I cannot imagine this is what
you need. But I might be wrong.
Thomas
It does make sense. I rewrote the query by hand (changed AND to OR) and
executed it in the MySql console and it gave the response I wanted.
The situation is kind of like this:
Table a is a category table, it only contains ids and names of categories.
Table B is a "products sold" table, and table C is a "products bought"
table. All products belong to a certain category, and I want a query that
gives me all the categories that a certain user has sold/bought products
from.
/Ludwig
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