From: mdc@keko.com.ar <mdc@keko.com.ar>
To: pgsql-sql@postgresql.org
Subject: Re: help with query!!!
Date: Tue, 15 Apr 2003 10:03:46 -0300
Message-ID: <3e9c0332.9ac.16838@keko.com.ar> (raw)
hi guys
> numeroVia | smallint | not null
> fechaHora | timestamp(3) with time zone | not null
> explain delete from "Transitos"
> where "codigoEstacion"= '02' and
> "numeroVia" = 1 and
> "fechaHora" = '2003-0403 17:34:06.92'::timestamp and
> "medioPago" = 'Efectivo' and
> "tipoTransito"= 'Normal' and
> categoria='01'
>You're casting the constant compared to fechaHora to
>timestamp, which is
>the wrong thing (timestamp != timestamp with timezone); and
>you're not
>casting the constant compared to numeroVia to smallint.
>Each of these
>type mismatches will prevent an indexscan.
ok , first thanks a lot for your responses, well
not my are doing this wrong castings, they are from ODBC
driver , my analisys was from server side, i mean, this
information is send from my aplication via ODBC to
postmaster .
For research propouses start the postmaster with debug level
3 and later ,recreate this queries with additional explain
clauses for analisis, the ::timestamp in syntax not in my
own code ok ? .
well questions i plan to change this castings , modifing the
database definition
numeroVia smallint -> to int4
fechaHora timeStamp(3) with timezone -> timeStamp(3) *
* milliseconds are very important to me, the aplication
register events at real time and millisecond are difference
into 2 events , application is multithread .
last question, is posible to make this changes whitout
download the database at all ? , the alter table ..... do
it?
Tia
MDC
pd: Sorry for my english , again ;)
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To: pgsql-sql@postgresql.org
Cc: mdc@keko.com.ar
Subject: Re: help with query!!!
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