Re: AGE function

--- Michael Fuhr <mike@fuhr.org> wrote:

> On Tue, Sep 06, 2005 at 10:05:06PM -0700, Louise
> Catherine wrote:
> > When I execute this statement : 
> > select AGE(TO_DATE('20041101','yyyymmdd'),
> > TO_DATE('19991201','yyyymmdd'))
> > 
> > at postgre 7.3.3, the result :
> >  age                   
> >  --------------------- 
> >  4 years 11 mons 1 day 
> > 
> > at postgre 8.0.3, the result :
> >  age             
> >  --------------- 
> >  4 years 11 mons 
> > 
> > My question : 
> > 1. How does postgre 7.3.3 calculate AGE function? 
> > 2. Why the result produced by postgre 7.3.3
> > is different from postgre 8.0.3 ?
> 
> I get the same answer ("4 years 11 mons") in 7.2.8,
> 7.3.10, 7.4.8,
> 8.0.3, and 8.1beta1.  Have you verified that
> to_date() is returning
> the correct dates?  What are the results of the
> following queries
> on each of your systems?
> 
> SELECT TO_DATE('19991201','yyyymmdd'),
> TO_TIMESTAMP('19991201','yyyymmdd');
> SELECT TO_DATE('20041101','yyyymmdd'),
> TO_TIMESTAMP('20041101','yyyymmdd');
> SHOW TimeZone;

at PostgreSQL 7.3.3 :to_date     to_timestamp          ----------  --------------------- 1999-12-01  1999-12-01
00:00:00+07to_date     to_timestamp          ----------  --------------------- 2004-11-01  2004-11-01 00:00:00+07
TimeZone   ----------- unknown     
 

at PostgreSQL 8.0.3 :to_date     to_timestamp          ----------  --------------------- 1999-12-01  1999-12-01
00:00:00+07to_date     to_timestamp          ----------  --------------------- 2004-11-01  2004-11-01 00:00:00+07
TimeZone    ------------ Asia/Jakarta 
 

> What operating system are you using?  
I'm using SuSE Linux 9.0 for the operating system

The result from your queries are similar, so what's 
wrong in my queries? What should I do? Cause I must
migrate database from PostgreSQL 7.3.3 to
PostgreSQl 8.0.3.

> BTW, it's "PostgreSQL" or "Postgres," not "postgre."
Sorry about the name :)

Thanks,
Louise

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