Обсуждение: BUG #1653: Bug in date

The following bug has been logged online:

Bug reference:      1653
Logged by:          Guilherme
Email address:      guilherme.silva@nexxera.com
PostgreSQL version: 7.4
Operating system:   Linux
Description:        Bug in date
Details:

Dear Postgres Support,

I think found a bug in postgres, see the sql:

BILHETAGEM=# select sum(tm_arquivo) from bilhete where
cd_caixa_postal_principal=1304 AND
BILHETAGEM-# dt_transacao >= to_date('01042005000000', 'ddmmyyyyHH24MISS')
AND
BILHETAGEM-# dt_transacao < to_date('02042005000000', 'ddmmyyyyHH24MISS');
sum
-----
968
(1 row)

BILHETAGEM=# select sum(tm_arquivo) from bilhete where
cd_caixa_postal_principal=1304 AND
BILHETAGEM-# dt_transacao >= to_date('01042005000000', 'ddmmyyyyHH24MISS')
AND
BILHETAGEM-# dt_transacao <= to_date('01042005235959', 'ddmmyyyyHH24MISS');
sum
-----

(1 row)

Look the rows number, all the information is on 01/04/2005, but only the
first sql can get the correct results.

I'm brazilian sorry for my bad english.

[]'s

"Guilherme" <guilherme.silva@nexxera.com> writes:
> BILHETAGEM=# select sum(tm_arquivo) from bilhete where
> cd_caixa_postal_principal=1304 AND
> BILHETAGEM-# dt_transacao >= to_date('01042005000000', 'ddmmyyyyHH24MISS')
> AND
> BILHETAGEM-# dt_transacao <= to_date('01042005235959', 'ddmmyyyyHH24MISS');

to_date() produces a date, not a timestamp.  I suspect you are after
to_timestamp.  If dt_transacao is a timestamp, the above will only
select rows that are at exactly midnight of 2005-04-01, because that's
what the date values will promote to.

            regards, tom lane

Guilherme Silva <guilherme.silva@nexxera.com> writes:
> Negative, i know what the to_date do.

I don't think you do, because you are feeding it input that it will
ignore --- the hh/mm/ss fields are just being thrown away.

regression=# select to_date('01042005000000', 'ddmmyyyyHH24MISS');
  to_date
------------
 2005-04-01
(1 row)

regression=# select to_date('01042005235959', 'ddmmyyyyHH24MISS');
  to_date
------------
 2005-04-01
(1 row)


            regards, tom lane

I understand you, sorry my english is too bad, ignore the last email.

I will try use to_timestamp.

Thanks.

Guilherme Silva
Programador - Planejamento
E-mail: guilherme.silva@nexxera.com
Tel/Fax: +55 48 2106-5698
ICQ: #119540871
http://www.nexxera.com
NEXXERA Tecnologia e Serviços S.A.
"Seu ambiente eletrônico de negócios"


Tom Lane wrote:

>"Guilherme" <guilherme.silva@nexxera.com> writes:
>
>
>>BILHETAGEM=# select sum(tm_arquivo) from bilhete where
>>cd_caixa_postal_principal=1304 AND
>>BILHETAGEM-# dt_transacao >= to_date('01042005000000', 'ddmmyyyyHH24MISS')
>>AND
>>BILHETAGEM-# dt_transacao <= to_date('01042005235959', 'ddmmyyyyHH24MISS');
>>
>>
>
>to_date() produces a date, not a timestamp.  I suspect you are after
>to_timestamp.  If dt_transacao is a timestamp, the above will only
>select rows that are at exactly midnight of 2005-04-01, because that's
>what the date values will promote to.
>
>            regards, tom lane
>
>
>

Negative, i know what the to_date do.

See the "dt_transacao _/*<=*/_ to_date("

The <= make the first sql equal to second

Second: "dt_transacao _/*<*/_ to_date('02042005000000')"

Guilherme Silva
Programador - Planejamento
E-mail: guilherme.silva@nexxera.com
Tel/Fax: +55 48 2106-5698
ICQ: #119540871
http://www.nexxera.com
NEXXERA Tecnologia e Serviços S.A.
"Seu ambiente eletrônico de negócios"


Tom Lane wrote:

>"Guilherme" <guilherme.silva@nexxera.com> writes:
>
>
>>BILHETAGEM=# select sum(tm_arquivo) from bilhete where
>>cd_caixa_postal_principal=1304 AND
>>BILHETAGEM-# dt_transacao >= to_date('01042005000000', 'ddmmyyyyHH24MISS')
>>AND
>>BILHETAGEM-# dt_transacao <= to_date('01042005235959', 'ddmmyyyyHH24MISS');
>>
>>
>
>to_date() produces a date, not a timestamp.  I suspect you are after
>to_timestamp.  If dt_transacao is a timestamp, the above will only
>select rows that are at exactly midnight of 2005-04-01, because that's
>what the date values will promote to.
>
>            regards, tom lane
>
>
>