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ID #1113

Technique d'accélération pour AS400 avec la table QTEMP

Méthode pour accélérer certains traitements d’un SELECT lourd sous l’AS400 :

Technique d’accélération avec création d’une table temporaire dans le schéma QTEMP sur l'AS400.

La table sera automatiquement supprimée dès que la connexion AS400 sera fermée.

 

IMPORTANT : Utilisez la même connexion pour le tAS400Row et le tAS400Input (cocher "USING AN EXISTING CONNECTION")

 

Dans le tAS400Row, écrire la commande suivante par exemple :

 

"DECLARE GLOBAL TEMPORARY TABLE FLUXEXT AS

   (SELECT a.iec AS COLONNE1,

           b.idd AS COLONNE2

      FROM TEST2.idce a,

          TEST3.idcd b  

    WHERE a.typ = '2'  

      AND a.cod =  b.cod)

     WITH DATA"

 

 

Dans le tAS400Input qui suit, après un OnSubJobOk, vous pouvez ensuite charger uniquement :

"SELECT COLONNE1, COLONNE2  FROM QTEMP.FLUXEXT "

 

 

 

Tags: as400 tAS400Input tAS400Row QTEMP

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Dernire mise jour: 2014-04-11 09:14
Auteur: Michel Preti
Rvision: 1.0

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