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Re: now() gives same time within the session

From: <Atul(dot)Goel(at)globaldatapoint(dot)com>
To: <andreas(dot)kretschmer(at)schollglas(dot)com>, <pgsql-performance(at)postgresql(dot)org>
Subject: Re: now() gives same time within the session
Date: 2010-07-12 12:23:40
Message-ID: 418EC9BD4D7125488CCAC5C7C559A24803ACF0@MS10.lsc.net (view raw or flat)
Thread:
Lists: pgsql-performance
Sure thanks a lot.

Regards,
Atul Goel

-----Original Message-----
From: pgsql-performance-owner(at)postgresql(dot)org [mailto:pgsql-performance-owner(at)postgresql(dot)org] On Behalf Of A. Kretschmer
Sent: 12 July 2010 12:15
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: [PERFORM] now() gives same time within the session

In response to Atul(dot)Goel(at)globaldatapoint(dot)com :
> Hi,
>
>
>
> I need to log the start and end time of the procedures in a table. But the
> start and end time are same. This is how I recreated the issue.
>
>
>
> create table test_time (time timestamp);
>
> delete from  test_time;
>
> insert into test_time select now();


Use timeofday() instead, now() returns the transaction starting time.

BEGIN
test=*# select now();
              now
-------------------------------
 2010-07-12 13:13:28.907043+02
(1 row)

test=*# select timeofday();
              timeofday
--------------------------------------
 Mon Jul 12 13:13:36.187703 2010 CEST
(1 row)

test=*# select now();
              now
-------------------------------
 2010-07-12 13:13:28.907043+02
(1 row)

test=*#


Regards, Andreas
--
Andreas Kretschmer
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