Re: which view is used another views

On 25 March 2011 19:13, salah jubeh <s_jubeh(at)yahoo(dot)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