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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 (view raw or flat)
Thread:
Lists: pgsql-performance
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
Kontakt:  Heynitz: 035242/47150,   D1: 0160/7141639 (mehr: -> Header)
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