Re: NOW vs CURRENT_DATE

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От Tino Wildenhain
Тема Re: NOW vs CURRENT_DATE
Дата
Msg-id 48B24ACB.8010906@wildenhain.de
обсуждение исходный текст
Ответ на NOW vs CURRENT_DATE  (dforum <dforums@vieonet.com>)
Список 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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