From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | "Raman Garg" <ramang(at)smartdatainc(dot)com> |
Cc: | "Richard Huxton" <dev(at)archonet(dot)com>, "pgsql-sql" <pgsql-sql(at)postgresql(dot)org> |
Subject: | Re: TIME ZONE SQL |
Date: | 2004-02-05 16:54:15 |
Message-ID: | 3968.1076000055@sss.pgh.pa.us |
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Lists: | pgsql-sql |
"Raman Garg" <ramang(at)smartdatainc(dot)com> writes:
> Actually my "between" is creating some problems and is not giving me results
> so what I have done is . IN MY WHERE CLAUSE OF QUERY:
I suspect that this revised clause will give you problems too, namely
selecting rows you don't want.
I think what may actually be happening here is that you have times
wrapping around past midnight. For instance consider
regression=# select '10:30'::time + '15 hours'::interval;
?column?
----------
01:30:00
(1 row)
regression=# select '10:30'::time - '15 hours'::interval;
?column?
----------
19:30:00
(1 row)
It seems to me that your approach to the problem is all wrong, and you
need to be using timestamp-based calculations not time-of-day-based
calculations.
regards, tom lane
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