Re: PostgreSQL8.2.3 Performance

Is there any reason you can't do something like this instead?

UPDATE produitscommandes
SET prixvente = p.prixvente
FROM produits p
WHERE produit = p.numero;

On 4/27/07, Martial Elise KIBA <mkiba(at)delgi(dot)gov(dot)bf> wrote:
> Hi all,
>
>
> I have a database running on POstgreSQL 8.2.3. The plpgsql functions were
> running well on my previous release.
>
> When i migrated to 8.2.3, I noticed some performance degradation, specially
> whith one of my function which makes an update to a table.
>
> Here is the code of the function
>
> CREATE OR REPLACE FUNCTION update1()
> RETURNS varchar(50)
> AS
> $BODY$
> DECLARE
> v_cur CURSOR FOR SELECT numero, prixvente FROM produits;
> v_prixvente produitscommandes.prixvente%TYPE;
> v_produit produits.numero%TYPE;
> BEGIN
> OPEN v_cur;
> LOOP
> FETCH v_cur INTO v_produit, v_prixvente;
> UPDATE produitscommandes SET prixvente=v_prixvente WHERE
> produit=v_produit;
> EXIT WHEN NOT FOUND; -- Sortie de la boucle
> END LOOP;
> CLOSE v_cur;
> RETURN 'mise à jour effectuée';
> END;
> $BODY$
> LANGUAGE 'plpgsql' VOLATILE;
>
> ''######################################""
>
> produitscommandes has a primary key on commande and produit
> produitscommandes has 2 indexes on commande and produit
> produits has a primary key on numero
>
> When i call the function it takes a lot (it can take 30 minutes for
> approximatively 5 000 rows in produitscommandes and 3 000 in produits)
>
> thanks all for your help.
>
> PS: tried vaccum and analyse on table produitscommandes
>
> Martial E. W. KIBA
> Ingénieur de Conception en Informatiques
> Option Génie-Logiciel
> Tél: (+226) 70 15 44 93
> Mail: mkiba(at)delgi(dot)gov(dot)bf / mkiba01(at)yahoo(dot)fr
>
>
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