Message-ID: <BAY115-F20EFAFF003B91E1FD30DE7AFD60@phx.gbl>
From: "Roger Moloney" <ramoloney@hotmail.com>
To: pgsql-interfaces@postgresql.org
Subject: ecpg: HOW TO READ RECORD ??
Date: Thu, 23 Aug 2007 14:55:10 +0000
Mime-Version: 1.0
Content-Type: text/plain; format=flowed

Hi,

We use ecpg (embedded sql) and plpgsql (postgres functions).

I'm having trouble trying to get embedded SQL to read the result of a 
plpgsql function which returns RECORD or SETOF RECORD.

Does anyone have an example of this ?  I don't see it in the ecpg source 
examples or in the ecpg manual.

/* following is an example of plpgsql to illustrate the data being returned 
*/

/* type defined for the record that the function will return to avoid using 
column list */
create type tp_GetPerson as (
  person_name    char(40),
  person_age      smallint
);

/* this function returns zero or more tp_GetPerson records */
create function p_GetPersonByDept (pperson_dept integer)
  returns SETOF tp_GetPerson as
$$
declare
  v_record tp_GetPerson%ROWTYPE;
begin
  for v_record in
    select person_name, person_age from person where person_dept = 
pperson_dept
  loop
     return next v_record;
  end loop;
  return;
end
$$
language 'plpgsql';

WHAT SHOULD THE ECPG PROGRAM LOOK LIKE THAT CAN  READ THE DATA RETURNED ?

thanks,
RML

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