Обсуждение: manipulating HeapTuples in a libpq client

I've got a server function that returns a set of HeapTuples. The
server function is invoked in a query sent by a libpq client.However,
I haven't spotted a way to decompose the HeapTuple returned to the
client. Attempts to call GetAttributeByNum on the client result in the
linker complaining about an undefined reference.

Any ideas appreciated.

Thank you.
Eric.

On Fri, Nov 23, 2007 at 04:51:53PM -0800, Eric Davies wrote:
> I've got a server function that returns a set of HeapTuples. The
> server function is invoked in a query sent by a libpq client.However,
> I haven't spotted a way to decompose the HeapTuple returned to the
> client. Attempts to call GetAttributeByNum on the client result in the
> linker complaining about an undefined reference.

I'm not entirely sure if this is even supposed to work. Certainly prior
to the transmission to the client the tuple will be converted to text,
so you'll have to parse the result. The question for me is why are you
returning heaptuples and not just a resultset which you can access via
the normal functions.

There are no client side functions to deal with heaptuples.

Have a nice day,
--
Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> Those who make peaceful revolution impossible will make violent revolution inevitable.
>  -- John F Kennedy