Em seg, 20 de mai de 2019 às 18:30, Tom Lane <t...@sss.pgh.pa.us> escreveu: > > Hmm ... given that pg_get_publication_tables() shouldn't return any > duplicate OIDs, it does seem unnecessarily inefficient to put it in > an IN-subselect condition. Peter, is there a reason why this isn't > a straight lateral join? I get a much saner-looking plan from > > FROM pg_publication P, pg_class C > - JOIN pg_namespace N ON (N.oid = C.relnamespace) > - WHERE C.oid IN (SELECT relid FROM pg_get_publication_tables(P.pubname)); > + JOIN pg_namespace N ON (N.oid = C.relnamespace), > + LATERAL pg_get_publication_tables(P.pubname) > + WHERE C.oid = pg_get_publication_tables.relid; >
And why not just JOIN direct with pg_publication_rel ? Regards, -- Fabrízio de Royes Mello Timbira - http://www.timbira.com.br/ PostgreSQL: Consultoria, Desenvolvimento, Suporte 24x7 e Treinamento
