On 25 March 2011 19:13, salah jubeh <s_ju...@yahoo.com> wrote: > Hello Guys > > The query in this function returns the dependency for level one. However, I > need the dependency for all level. I am still new with plpgsql so; how can I > use recursive function to return all dependency for all levels > > CREATE OR REPLACE FUNCTION dependon (var text) RETURNS SETOF text AS > $BODY$ > DECLARE > node record; > BEGIN > > FOR node IN SELECT relname FROM pg_class WHERE OID in ( > SELECT ev_class FROM pg_rewrite, pg_depend > WHERE pg_depend.objid = pg_rewrite.oid > AND deptype ='n' > AND refobjsubid = 1 > AND refobjid::regclass::text = $1) > LOOP > IF node.relname IS NOT NULL THEN > > RETURN NEXT depend(node.relname); > RETURN NEXT node.relname; > > END IF; > > END LOOP; > END > $BODY$ > LANGUAGE 'plpgsql'; > > You can do it with "WITH RECURSIVE" without PL/pgSQL:
http://www.postgresql.org/docs/current/static/queries-with.html
