Re: fetching on joined table
Re: fetching on joined table
- Subject: Re: fetching on joined table
- From: Chuck Hill <email@hidden>
- Date: Sun, 10 Apr 2011 21:30:47 -0700
| Hello Ray,
Hi,
I'm newbie on WebObjects and I have big problem to fetching on joined table. Example : I have my SQL like that :
A good rule with WebObjects is "If you are thinking about SQL, you are doing it wrong." There are times (i.e. when optimizing) when you do need to think about the SQL, but thinking in terms of objects is usually the better way.
select a.id b.id as ID, c.option as option, decode(d.no, 1, 'one', 2, 'two', 'unknow') as order
WebObjects (EOF) does not do mixed table selects like this (unless you are selecting Raw Rows). It selects whole rows of tables and makes them into related Java objects.
from ta a, tb b, tc c, td d where c.option in ('1', '2','3') and c.option = b.option
How to translate this SQL request in EOF using qualifier or spec qualifier?
Thanks for your help.
What are the relationships in the model between A, B, C, and D? What are you trying to fetch?
Chuck
-- Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their overall knowledge of WebObjects or who are trying to solve specific problems.
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