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
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