Re: Getting Out Parameter in the application using libpq

From: Merlin Moncure <mmoncure@gmail.com>
Subject: Re: [GENERAL] Getting Out Parameter in the application using libpq
To: "Ehsan Haq" <ehsan_haq98@yahoo.com>
Cc: pgsql-general@postgresql.org
Date: Friday, September 11, 2009, 12:08 PM

On Fri, Sep 11, 2009 at 12:31 AM, Ehsan Haq <ehsan_haq98@yahoo.com> wrote:
>
> Hi,
>    I am looking for a way to get the OUT parameters of a FUNCTION/PROCEDURE in my application (C++) using C libpq library. I can get the result set of an OUT parameter having REFCURSOR data type through an explicit FETCH ALL from "YYYY" but for OUT parameter of type integer/varchar I dont have a clue. Can anyone tell me how it is done or suggest any work around for this?

name your cursor:  also, remember that your cursor is only good for
duration of transaction.

> Using the following code I can get the refcursor.
>
> CREATE OR REPLACE
> Function getAddresses
> (
> pName IN varchar2, outCursor refcursor

outCursor := 'outcur';

[...]

FETCH all FROM outcur;


see:
http://www.postgresql.org/docs/8.4/interactive/plpgsql-cursors.html#PLPGSQL-CURSOR-USING

merlin

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