Re: [SQL] Date fields and libpq....

At 01:28 PM 6/26/98 -0700, you wrote:
>> Hi there,
>> I am doing a query on a date field and would like the answer in
>> epoch time as apposed to a string. I am using PQgetvalue(res,i,0) and
>> can successfully get the string date as a response. Is it possible to
>> get an epoch result or do I have to write my own routine to parse the
>> string into the tm struct so I can use mktime to get the epoch. The
>> latter solution seems quite a hassle and if anyone has a better
>> solution, please let me know. Thanks have a good weekend.
>
>Ooops,
> Sorry, the field discussed above is cast as an abstime field not a
>date... If that makes a difference. I have tried explicitly casting the
>result from PQgetvalue(res,i,0) as an 'unsigned long' but now seem to be
>getting the numerical value of the string instead of the epoch number
>which I am looking for. Still looking for answers if anyone has 'em..
>Thanks again.
>
>--
>Colin Dick
>On Call Internet Services
>cdick(at)mail(dot)ocis(dot)net

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));