Question

您好我遇到了一个非常复杂的查询问题，我没有编写查询但我必须维护它。

我有下面的超长查询，它运行良好一段时间（缓慢但很好），但在上个月的一些时间它停止工作。我们不会得到一个错误它只是超时返回结果。

现在，如果我在下面运行这个有趣的查询，并且删除了选择条件中的第一个子查询，结果将在136秒内返回前50个。

如果我在几小时之后将它留在里面。另外要注意的是，如果我在select语句中接受子查询并在它自己的硬编码上运行它，传入它的任何值都会在0.004秒内返回结果。

如果我把它全部留下来但是在这个长查询中转到核心查询并对SDDOCO施加限制，这样它将返回一个结果我在94秒内得到结果并且如果我有没关系选择与否的子查询。

我认为其中一个结果是导致问题并使查询陷入困境但我想不出一个好方法来确定哪个项会导致这个...我的结果集返回时是47k记录。

任何有关我可以查看的内容或如何进一步调查此问题的建议都将不胜感激。

SELECT
SUM((GL.GLAA/100) * (CAST(COALESCE((Select CXCRR from PRODDTA.F0015 F2 WHERE CXEFT = (SELECT MAX(CXEFT) FROM PRODDTA.F0015 F3 WHERE F3.CXEFT <= GL.GLDGJ) and CXCRCD = GL.GLCRCD AND CXCRDC ='USD'), 1) AS NUMERIC(15,4)))) TEST1,
SUM((GL.GLAA/100)) test2
FROM (SELECT MAX(SDAN8) SDAN8, MAX(SDMCU) SDMCU, MAX(SDDOCO) SDDOCO, MAX(SDDOC) SDDOC, MAX(SDSHAN) SDSHAN, CASE WHEN NVL(TRIM(TMURRF),' ') = ' ' then SDURRF ELSE TMURRF END SDURRF, MAX(SDDCTO) SDDCTO, MAX(SDDGL) SDDGL, MAX(SDASN) SDASN
    , SUM(CASE WHEN IMGLPT like 'FG%' THEN (CASE WHEN NOT (UMCONV IS NULL) THEN SDSOQS/100 * UMCONV/10000000 else SDSOQS/100 END) ELSE 0 END) AS SDSOQS
    , SUM(CASE WHEN IMGLPT = 'FG04' THEN (CASE WHEN NOT (UMCONV IS NULL) THEN SDSOQS/100 * UMCONV/10000000 ELSE SDSOQS/100 END) ELSE 0 END) AS AER_SDSOQS
    , SUM(CASE WHEN IMGLPT like 'FG%' THEN (CASE WHEN SDSRP5 = '527' THEN (CASE WHEN NOT (UMCONV IS NULL) THEN SDSOQS/100 * UMCONV/10000000 ELSE SDSOQS/100 END) ELSE 0 END) ELSe 0 END) AS MDJ_SDSOQS
    , MAX(SDIVD) SDIVD, MAX(SDADDJ) SDADDJ
    , SUM(CASE WHEN SDWTUM = 'LB' THEN SDITWT WHEN UCCONV is not null then SDITWT*(UCCONV/10000000) WHEN CONV is not null THEN SDSOQS*CONV*10 ELSE 0 END)/10000 AS WEIGHT
    ,SUM(CASE WHEN IMGLPT like 'FG%' THEN 
      CASE 
            WHEN SDWTUM = 'LB' THEN  SDITWT 
            WHEN UCCONV IS NOT NULL THEN SDITWT*(UCCONV/10000000)
            WHEN CONV is not null THEN SDSOQS*CONV*10
            ELSE 0 END
    ELSE 0
    end)/10000 as FG_WEIGHT,
    SUM(CASE WHEN IMGLPT = 'FG04' THEN 
      CASE 
            WHEN SDWTUM = 'LB' THEN  SDITWT 
            WHEN UCCONV IS NOT NULL THEN SDITWT*(UCCONV/10000000)
            WHEN CONV is not null THEN SDSOQS*CONV*10
            ELSE 0 END
    ELSE 0
    end)/10000 as AER_WEIGHT,
    SUM(CASE WHEN SDSRP5 = '527' THEN 
      CASE 
            WHEN SDWTUM = 'LB' THEN  SDITWT 
            WHEN UCCONV IS NOT NULL THEN SDITWT*(UCCONV/10000000)
            WHEN CONV is not null THEN SDSOQS*CONV*10
            ELSE 0 END
    ELSE 0
    end)/10000 as MDJ_WEIGHT,
    SUM(CASE WHEN IMGLPT = 'FG07' THEN 
      CASE 
            WHEN SDWTUM = 'LB' THEN  SDITWT 
            WHEN UCCONV IS NOT NULL THEN SDITWT*(UCCONV/10000000)
            WHEN CONV is not null THEN SDSOQS*CONV*10
            ELSE 0 END
    ELSE 0
    end)/10000 as MDJ_3rdParty_WEIGHT, max(SDCARS) SDCARS
  FROM PRODDTA.F42119
  left join proddta.F554202x on trim(SDURRF) = trim(TMUSRRSV1) and SDDOCO = TMDOCO
  LEFT JOIN PRODDTA.F4101 ON IMITM = SDITM
  LEFT JOIN PRODDTA.F41002 ON UMITM = SDITM AND SDMCU = UMMCU AND SDUOM = UMUM AND UMRUM = imuom1
  left join PRODDTA.F41003 on UCUM = SDWTUM and UCRUM = 'LB'
  Left JOin (SELECT UMMCU as MCU, UMITM as ITM, UMUM as UM, max(CASE WHEN UMRUM = 'LB' THEN UMCONV/10000000 ELSE UMCONV/10000000 * UCCONV/10000000 END) AS CONV 
    FROM PRODDTA.F41002
    LEFT JOIN PRODDTA.F41003
      ON UMRUM = UCUM
    WHERE (UCRUM = 'LB' OR UMRUM = 'LB')
    GROUP BY UMMCU, UMITM, UMUM) CONV2
  ON MCU = SDMCU AND ITM = SDITM AND UM = SDUOM
    WHERE SDLNTY = 'S' 
    AND SDSOQS > 0 
    and not ((SDLTTR = 980 AND SDNXTR = 999) OR SDSOCN = SDUORG) 
    and SDSRP1 <> 'BLK' 
    and not exists (select SDDOCO from proddta.F42119 GA where SDADDJ >= FISCALPERIODSTART(14,1) and SDADDJ <= FISCALPERIODEND(14,12) and SDUOM = 'GA' and F42119.SDDOCO = GA.SDDOCO)
    and SDDOCO in (1230256,1227461,1230628,1225291,1225297,1231601,1242703,1248671,1249556,1244905)
  GROUP BY CASE WHEN NVL(TRIM(TMURRF),' ') = ' ' then SDURRF ELSE TMURRF END) DTL
Left JOIN PRODDTA.F0101 BT ON BT.ABAN8 = DTL.SDAN8
Left JOIN PRODDTA.F0101 ST ON ST.ABAN8 = DTL.SDSHAN
INNER JOIN PRODDTA.F0911 GL
ON TRIM(GL.GLEXR) = TRIM(DTL.SDURRF)
WHERE GLDCT = 'PV' AND GLDGJ >= KIKDATETOJUL(KIKE1JULTODATE(FISCALPERIODSTART(14,1)) - 90) and GLDGJ <= KIKDATETOJUL(KIKE1JULTODATE(FISCALPERIODEND(14,12)) + 90) AND GLOBJ IN ('5025','5026') AND  GLLT ='AA' AND GLEXTL <> 'AM' AND GLEXR <> ' ' and GLRE = ' '
GROUP BY GL.GLEXR, GL.GLDCT, 
CASE WHEN SDDCTO IN ('ST','SJ') THEN CAST(SDSHAN AS NCHAR(12)) ELSE TRIM(SDMCU) END, DTL.SDASN, DTL.SDDOC, DTL.SDDOCO, DTL.SDDCTO, DTL.SDSOQS, DTL.AER_SDSOQS, DTL.MDJ_SDSOQS, DTL.SDSHAN, DTL.SDAN8, SDURRF, GL.GLSUB, Weight, FG_Weight, AER_WEIGHT, MDJ_WEIGHT, MDJ_3rdParty_WEIGHT

Answer 1

我们提供了以下代码，以便在select语句之前运行，该语句改变了Oracle DB优化查询的方式。

alter session set optimizer_index_caching=0;
alter session set optimizer_index_cost_adj=80;

这解决了这个问题。

选择中的子查询会导致我的结果不返回

1 个答案: