From: | Gregory Stark <stark(at)enterprisedb(dot)com> |
---|---|
To: | "Simon Riggs" <simon(at)2ndquadrant(dot)com> |
Cc: | <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Negative LIMIT and OFFSET? |
Date: | 2007-12-14 01:47:23 |
Message-ID: | 87lk7ym4ic.fsf@oxford.xeocode.com |
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Lists: | pgsql-hackers |
"Simon Riggs" <simon(at)2ndquadrant(dot)com> writes:
> I'm fairly surprised these queries work. Is there some reason why we
> support this? April Fools Day? Jules Verne? I'm all for fast queries,
> but zero seems like the lowest value we should support...
Huh, I was all set to post an example of a useful application of it but then
apparently I'm wrong and it doesn't work:
postgres=# select * from generate_series(1,10) offset -1 limit 2;
generate_series
-----------------
1
2
(2 rows)
I'll leave it as an exercise for the reader to guess what I was expecting.
So given that that doesn't work I don't see any particular reason to accept
negative offsets or limits in 8.4 and on.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Ask me about EnterpriseDB's On-Demand Production Tuning
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