Re: How to use dblink within pl/pgsql function:

Thanks to Joe Conway for pointing out a couple of typos in what I posted
(the original code that I used didn't have quite as many, I edited it to
try to simplify).  He also pointed out that I had not initialised my
'count' variable, which was a genuine mistake.  I am pleased to say that
the corrected function does work as expected:

CREATE OR REPLACE FUNCTION find() RETURNS INTEGER AS '
  DECLARE
    count INTEGER := 0;
    myrec RECORD;
  BEGIN
  FOR myrec IN SELECT * FROM DBLINK(''hostaddr=127.0.0.1'',
   ''select ra, decl from twomass where errbox &&
   box(point(120.45,0.5),point(120.50,0.75))'') as
     temp(x float8, y float8) LOOP
     count := count + 1;
  END LOOP;
  RETURN count;
END; ' LANGUAGE 'plpgsql';

I can use it in a query such as:

SELECT * FROM find();

And it returns the number of rows returned from the join using R-trees.
Of course there are easier ways of doing what this function does, I just
wanted to get that working as a basis on which to build something more
advanced.

--
Clive Page