Date: Tue, 15 Jan 2013 09:08:50 -0800 (PST)
From: kgeographer <karl.geog@gmail.com>
To: pgsql-sql@postgresql.org
Message-ID: <1358269730873-5740324.post@n5.nabble.com>
In-Reply-To: 
 <CAL_0b1vmtwqqjK4B2o7p9n3CWnV0SqGw6qms2zjm0oRfak=Myg@mail.gmail.com>
References: <CC711732.32BC%jsharrett@tidemark.net>
	<CAL_0b1vmtwqqjK4B2o7p9n3CWnV0SqGw6qms2zjm0oRfak=Myg@mail.gmail.com>
Subject: Re: returning values from dynamic SQL to a variable
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I have a related problem and tried the PERFORM...EXECUTE pattern suggested
but no matter where I put PERFORM I get 'function not found' errors.

I want to loop through id values returned by a query and execute another
with each i as a parameter. Each subquery will return 6-8 rows. This is a
simplified example, in the real app the subquery is doing some aggregation
work.

Tried many many things including this pattern below and read everything I
could find, but no go. Any help appreciated.

++++++++++++++++
create or replace function getRowsA() returns setof record as $$
declare
 r record;
 loopy record;
 i integer;
 sql text;
begin
 for r in select * from cities loop
  i := r.id;
  sql := 'select city,topic,weight from v_doctopic where city = ' || i;
  EXECUTE sql;
  return next loopy;
 end loop;
 return;
end;
$$ language 'plpgsql';

select * from getRowsA() AS foo(city int, topic int, weight numeric)


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karlg
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