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Function that creates a custom (temporary) table AND returns a pointer to it = impossible in pg?

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What I want is something similar to this:

CREATE OR REPLACE FUNCTION f( /* "some args..." */)
  RETURNS text AS
$BODY$
DECLARE
 ...
BEGIN
 DROP TABLE IF EXISTS tbl_temp;

 CREATE TEMPORARY TABLE tbl_temp(
  -- "based on args..."
  );

 WHILE
  INSERT INTO tbl_temp VALUES (/*"some values"*/);
 END LOOP;

 /*create indexes on it, manipulate, whatever...*/

 RETURN 'tbl_temp'::text;

END;
$BODY$
  LANGUAGE 'plpgsql'

Basically, what I want is a similar function f() that returns me a "pointer" 
to the table which I can use in some query like this: SELECT * FROM 
regclass(f()); Currently, this query only gives me one row 'tbl_temp'..., 
but not what I want: "SELECT * FROM tbl_temp;" Can this be done in Postgres?

Original post: 
http://forums.devshed.com/postgresql-help-21/function-that-creates-a-custom-table-and-returns-a-pointer-675539.html

Kind regards,
Davor 



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