Re: which view is used another views

[salah jubeh <s_jubeh@xxxxxxxxx>]

I  am using postgresql 8.3
 

Best Regard
 
Eng. Salah Al Jubeh

Palestine Polytechnic University

College of Applied Science

Computer Science
P.O. Box 198

Mobile:++97259369122
Tel:++97222254680

 

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From: Emre Hasegeli <hasegeli@xxxxxxxxxxx>
To: salah jubeh <s_jubeh@xxxxxxxxx>
Cc: pgsql <pgsql-general@xxxxxxxxxxxxxx>
Sent: Fri, March 25, 2011 6:25:13 PM
Subject: Re: which view is used another views

On 25 March 2011 19:13, salah jubeh <s_jubeh@xxxxxxxxx> 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