> -----Mensaje original-----
> De: Scott Marlowe [mailto:[EMAIL PROTECTED] 
> 
> 
> Note that if you are storing your time stamp as timestamptz, 
> you can use the "at time zone 'xyz'" construct to create an 
> index, and as long as you retrieve them with the same 
> construct you'll get to use the index.
> 
> create index test_ts_month_trunc on testtable 
> (date_trunc('month',(ts at time zone 'MST'))); 
> select * from testtable 
> where date_trunc('month',(ts at time zone 'MST'))='2007-10-01
00:00:00'::timestamp;
> 

I see the point. Thanks for the elaboration.



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