From: Kachun Lee <kachun@pathlink.com>
To: Colin Dick <cdick@mail.ocis.net>
Cc: pgsql-sql@postgreSQL.org
Subject: Re: [SQL] Date fields and libpq....
Date: Fri, 26 Jun 1998 15:05:40 -0700
Message-ID: <3.0.1.32.19980626150540.006ab3dc@rr.pathlink.com> (raw)
In-Reply-To: <Pine.LNX.3.96.980626140758.20477B-100000@ocis.ocis.net>
References: <3.0.1.32.19980626134257.006b5b70@rr.pathlink.com>
At 02:17 PM 6/26/98 -0700, you wrote:
>> I think you may want to change your query to:
>>
>> select date_part(datetime(abst_att), 'epoch') ....
>>
>> In addition, unless you were using BINARY cursor, you will need to do
>> something like:
>>
>> time_t t = atol(PQgetvalue(res, i, 0));
>
>I have tried this but don't think I understand the internal datetime
>function correctly. Should my query be(start is defined as abstime):
>
>select start(datetime(abst_att),'epoch') from timebase;
It should be:
select date_part(datetime(start),'epoch') from timebase;
This means:
datetime(start) - change start to datetime.
actually, date_part may be able to take
abstime... I am just not sure.
date_part(datetime(start), 'epoch')
- change datetime(start) as epoch,
i.e. number of sec since 1970/1/1
>And then should this work:
>
>printf("%lu\n",(unsigned long)PGgetvalue(res,0,0));
You would do:
printf("%s\n", PGgetvalue(res,0,0));
PGgetvalue will return the number of seconds in *string* form. If your
start is around now, the printf should print something like "898898516".
That is why you need to convert it to time_t by something like atol.
>Thanks for your help.
>
>--
>Colin Dick
>On Call Internet Services
>cdick@mail.ocis.net
>
>
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To: pgsql-sql@postgresql.org
Cc: kachun@pathlink.com, cdick@mail.ocis.net
Subject: Re: [SQL] Date fields and libpq....
In-Reply-To: <3.0.1.32.19980626150540.006ab3dc@rr.pathlink.com>
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