Zwischen länger dauern. Tuning SQL-Abfrage

Question

Ich habe die unten Abfrage, die lange Ausführungszeit dauert ca. 20 Minuten für eine Reihe von Zeile 1345222. Ich habe eine Möglichkeit, dies zu tun, vor allem die Beteiligt-Vergleich?

<code> 
SELECT /*+ PARALLEL(32) */ upexp.item, 
        upexp.loc, 
        startdate, 
        sku_exp.bucket_size, 
        MAX(upexp.sku_multiplier) OVER (PARTITION BY upexp.item,upexp.loc) max_sm 
         FROM 
           (SELECT bucket bkt, 
             MIN(dates) OVER (PARTITION BY bucket) minbk, 
             MAX(dates) OVER (PARTITION BY bucket) maxbk 
           FROM (
             SELECT LEVEL AS sl, 
             NEXT_DAY (TRUNC (SYSDATE, 'YEAR') + 7 * LEVEL - 8,'SATURDAY') AS dates, 
             CEIL (LEVEL/4) AS bucket 
             FROM DUAL 
             CONNECT BY LEVEL <= ((4 - MOD (78, 4) + 78) + 78)) yy 
           -- GROUP BY bucket 
           ) minmaxdate , 
         stsc.u_promo_sku_expand sku_exp, 
         stsc.u_promo_upload_expand upexp 
         WHERE sku_exp.bucket_size = 4 
         AND sku_exp.startdate BETWEEN minmaxdate.minbk AND minmaxdate.maxbk 
         AND upexp.item = sku_exp.item 
         AND upexp.loc = sku_exp.loc 
         AND upexp.u_country = sku_exp.u_country 
         AND ((eff BETWEEN minmaxdate.minbk AND minmaxdate.maxbk+6) 
         OR (disc BETWEEN minmaxdate.minbk AND minmaxdate.maxbk+6) 
         OR (eff <= minmaxdate.minbk AND disc >= minmaxdate.maxbk+6)) 

</code> 

Answer 1

Dieser Block

(SELECT bucket bkt, 
    MIN(dates) OVER (PARTITION BY bucket) minbk, 
    MAX(dates) OVER (PARTITION BY bucket) maxbk 
FROM (
    SELECT LEVEL AS sl, 
     NEXT_DAY (TRUNC (SYSDATE, 'YEAR') + 7 * LEVEL - 8,'SATURDAY') AS dates, 
     CEIL (LEVEL/4) AS bucket 
    FROM DUAL 
    CONNECT BY LEVEL <= ((4 - MOD (78, 4) + 78) + 78)) yy 
    -- GROUP BY bucket 
    ) 

scheint nutzlos zu sein, da man nur Min- und Max-Wert benötigen.

Versuchen Sie dieses:

WITH minmaxdate AS 
    (SELECT 
     NEXT_DAY (TRUNC (SYSDATE, 'YEAR') + 7 * 1 - 8,'SATURDAY') AS minbk, 
     NEXT_DAY (TRUNC (SYSDATE, 'YEAR') + 7 * ((4 - MOD (78, 4) + 78) + 78) - 8,'SATURDAY') AS maxbk 
    FROM dual) 
SELECT item, loc, startdate, sku_exp.bucket_size, 
    MAX(upexp.sku_multiplier) OVER (PARTITION BY item, loc) max_sm 
FROM stsc.u_promo_sku_expand sku_exp 
    JOIN stsc.u_promo_upload_expand upexp USING (item, loc, u_country) 
    CROSS JOIN minmaxdate 
WHERE sku_exp.bucket_size = 4 
    AND sku_exp.startdate BETWEEN minmaxdate.minbk AND minmaxdate.maxbk 
    AND (
     eff BETWEEN minmaxdate.minbk AND minmaxdate.maxbk+6 
     OR (eff <= minmaxdate.minbk AND disc >= minmaxdate.maxbk+6) 
     OR disc BETWEEN minmaxdate.minbk AND minmaxdate.maxbk+6 
    );