| From: | Tino Wildenhain <tino(at)wildenhain(dot)de> |
|---|---|
| To: | dforum <dforums(at)vieonet(dot)com> |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: NOW vs CURRENT_DATE |
| Date: | 2008-08-25 06:01:47 |
| Message-ID: | 48B24ACB.8010906@wildenhain.de |
| Views: | Whole Thread | Raw Message | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
Hi,
dforum wrote:
> Hello every body,
>
> I just discover a big not only big huge difference between NOW() and
> CURRENT_DATE.
>
> Did you already know about it and do you know why ?
>
> DELETE FROM blacklist where bl_date < (NOW() - interval '2 DAY');
> on 6 000 000 of records
> 699 ms
>
> DELETE FROM blacklist where bl_date < (CURRENT_DATE - interval '2 DAY');
> on 6 000 000 of records
Try that with a timestamp - column and use now() and current_timestamp
with a long running query and then compare min(column) max(column) in
both cases :-)
Regards
Tino
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