patch for EXECUTE .. INTO (from TODO)

Hello

    I did small trivial patch (almost all was written) for storing
result from executing dynamic query into ROW or RECORD variable.

CREATE TABLE fxx(i integer, y integer);
CREATE TYPE fxt AS (i integer, z integer);

CREATE OR REPLACE FUNCTION foo(varchar) RETURNS RECORD AS $$
DECLARE _r RECORD; _f fxx%ROWTYPE; _t fxt; z fxx;
BEGIN
  DELETE FROM fxx;
  EXECUTE 'INSERT INTO fxx VALUES(10,15)';
  EXECUTE 'SELECT (row).* from (select row(10,1)::fxx)s' INTO _r;
  RAISE NOTICE '%', _r.i;
  EXECUTE 'SELECT * FROM '||$1||' LIMIT 1' INTO _f;
  RETURN _f;
END; $$ LANGUAGE plpgsql;
SELECT foo('fxx');

pokus=# NOTICE:  10
   foo
---------
 (10,15)
(1 row)

Best regards
Pavel Stehule