Re: Get Unix timestamp from SQL timestamp through libpq

man 3 strftime

2010/1/11 Yan Cheng Cheok <yccheok(at)yahoo(dot)com>:
> I try already. Neither of them can accept string parameter, and convert them to unit timestamp (long).
>
> Thanks and Regards
> Yan Cheng CHEOK
>
>
> --- On Mon, 1/11/10, Vincenzo Romano <vincenzo(dot)romano(at)notorand(dot)it> wrote:
>
>> From: Vincenzo Romano <vincenzo(dot)romano(at)notorand(dot)it>
>> Subject: Re: Get Unix timestamp from SQL timestamp through libpq
>> To: "Yan Cheng Cheok" <yccheok(at)yahoo(dot)com>
>> Cc: pgsql-general(at)postgresql(dot)org
>> Date: Monday, January 11, 2010, 2:58 PM
>> Give a try to:
>>
>> man 2 time
>> man 3 ctime
>>
>>
>> 2010/1/11 Yan Cheng Cheok <yccheok(at)yahoo(dot)com>:
>> > I know I can convert SQL timestamp to unix timestamp,
>> using the following way.
>> >
>> > SELECT extract(epoch FROM now());
>> >
>> > Now, I have a stored procedure function, which will
>> directly return a table row to the caller. One of the row
>> field is "timestamp" type.
>> >
>> > In my application, I am using libpq. I wish to use
>> libpq functions (or any c/c++ function), to convert
>> "2010-01-11 13:10:55.283" into unix timestamp. Off course, I
>> can create another stored procedure named
>> >
>> > SQLTimestamp2UnixTimestamp
>> > SELECT extract(epoch FROM $1);
>> >
>> > But I just wish to accomplish this task with a single
>> c/c++ function call, without involving stored procedure.
>> >
>> > Any suggestion? Thanks!
>> >
>> > Thanks and Regards
>> > Yan Cheng CHEOK
>> >
>> >
>> >
>> >
>> >
>> > --
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>> >
>>
>>
>>
>> --
>> Vincenzo Romano
>> NotOrAnd Information Technologies
>> cel. +39 339 8083886  | gtalk. vincenzo(dot)romano(at)notorand(dot)it
>> fix. +39 0823 454163  | skype. notorand.it
>> fax. +39 02 700506964 | msn.   notorand..it
>> NON QVIETIS MARIBVS NAVTA PERITVS
>>
>
>
>
>
>

--
Vincenzo Romano
NotOrAnd Information Technologies
cel. +39 339 8083886 | gtalk. vincenzo(dot)romano(at)notorand(dot)it
fix. +39 0823 454163 | skype. notorand.it
fax. +39 02 700506964 | msn. notorand.it
NON QVIETIS MARIBVS NAVTA PERITVS