RE: Where 1 = 1

From: <Iulian.ILIES_at_mobil-rom.com>
Date: Thu, 25 Oct 2001 23:46:17 -0700
Message-ID: <F001.003B5572.20011025235518@fatcity.com>

I sometime used this kind of aproach when I dinamically build the WHERE expression.
Something like this:

where_condition := ' WHERE 1 = 1 '
LOOP
where_condition := ' AND ' || new_condition END LOOP
The point is if there are any condition to add the first condition is always true so it won't affect the final where_condition. The same is when there aren't any condition to add.
And in some cases there are really no conditions to add, thus your final query will have only a condition like ' WHERE 1 = 1 '.

If you need to connect all the intermediate condition by OR operator probably you will use the
WHERE 1 = 0. I hope I'll make my point clear enough and of course is any related to your case. Maybe if you show us the entire query, someone can tell you more about it.

Regards
Iulian Ilies

-----Original Message-----
Sent: Friday, October 26, 2001 2:20 AM
To: Multiple recipients of list ORACLE-L

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I was monitoring a load test of my company's new application when I came across something interesting. One of the more monstrous queries had the following as part of its WHERE clause: 'AND 1 = 1'

Has anyone seen this used before? What is it supposed to achieve?

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