Re: PQdeleteTuple function in libpq

On 6/2/2011 4:28 AM, Pavel Golub wrote:
> Hello, Andrew.
>
> You wrote:
>
> AC> On 6/1/2011 11:43 AM, Pavel Golub wrote:
>>> Hello.
>>>
>>> I'm some kind of PQdeleteTuple function will be very usefull in libpq.
>>> Because right now after deleting some record I need refetch result
>>> set, or mark tuple as deleted and this is headache for me.
>>>
>
> AC> IMHO, this should be handled by the application. You could track tuples
> AC> removed in an int[] or copy the result set into an application defined
> AC> array of C structures. I've always been under the impression that
> AC> PGresult objects are immutable once delivered to the application.
>
>
> Andrew, why we have PQmakeEmptyPGresult, PQcopyResult,
> PQsetResultAttrs, PQsetvalue and PQresultAlloc in this case? Of course
> there's no big deal with their absence but let's be consistent.
>

I'm not entirely sure what you are trying to do, but can't you use
PQmakeEmptyPGresult, PQsetResultAttrs and PQsetvalue to construct a
result that excludes the tuples you don't want followed by a
PQclear(initial_result)?

--
Andrew Chernow
eSilo, LLC
global backup
http://www.esilo.com/