Re: Trouble to understand plain of postgresql

On 9 Jun 2003 at 18:57, Cristian Custodio wrote:

> explain analyze
> select ven.filcli, ven.codcli, rec.datven
>  from tt_ven ven, tt_rec rec
>  where ven.codfil = rec.codfil
>   and ven.sequen = rec.sequen
>   and rec.datven between to_date('01/03/2003 00:00:00', 'dd/mm/yyyy
> hh24:mi:ss')
>  and to_date('03/03/2003 23:59:59', 'dd/mm/yyyy
> hh24:mi:ss')
>  and rec.flgest = 'A'
>
>
> Nested Loop (cost=0.00..12.03 rows=1 width=67) (actual time=114.00..114.00
> rows=0 loops=1)
>  -> Index Scan using i_lc_rec_datven_flgest on tt_rec rec ...
>  Index Cond: ((datven >= '2003-03-01 00:00:00'::timestamp ...
>  -> Index Scan using pk_ven on tt_ven ven (cost=0.00..6.01 rows=1 width=38)
> (never executed)
>  Index Cond: ((ven.codfil = "outer".codfil) AND (ven.sequen =
> "outer".sequen))
> Total runtime: 115.00 msec
> Here it use INDEX SCAN i_lc_rec_datven_flgest

Just a guess, is  rec.datven a date field and not a timestamp?

Bye
 Shridhar

--
I've already got a female to worry about.  Her name is the Enterprise.        --
Kirk, "The Corbomite Maneuver", stardate 1514.0