Re: now() gives same time within the session

From: "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: now() gives same time within the session
Date: 2010-07-12 11:15:00
Message-ID: 20100712111500.GA14489@a-kretschmer.de
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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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