调整执行查询速度慢

Question

我有一个执行时间太长的查询。

我用数据库调整顾问来检查这个查询，它提出了一些缺失的索引和统计。问题是我无法在这些表上创建缺少的索引和统计信息，因为它会减慢插入/更新并影响其他脚本。由于我的查询，他们不能牺牲他们的脚本性能。

没有DTA的帮助或打扰其他脚本如何调整我的查询？我可以把它分成小块吗？如果是这样，怎么样？

INSERT INTO #val 
SELECT lid.orgid, 
     lid.periodid, 
     lid.sourceid, 
     lid.statementtypecode, 
     lid.financialsbucketid, 
     lid.statementcurrencycodeiso, 
     lid.lineitemid, 
     lll.financialconceptidglobal, 
     lid.physicalmeasureid, 
     CASE 
     WHEN EXISTS(SELECT TOP 1 '1' 
        FROM trf.dbo.lineitemfundbdescription LIFD(nolock) 
        WHERE lll.orgid = lifd.orgid 
          AND lll.lineitemid = lifd.lineitemid) THEN 
     (SELECT lifd.lineitemshortdescription 
      FROM trf.dbo.lineitemfundbdescription LIFD(nolock) 
      WHERE lll.orgid = lifd.orgid 
       AND lll.lineitemid = lifd.lineitemid) 
     ELSE lll.lineitemname 
     END    AS LineItemName, 
     (CASE 
      WHEN (lid.reportedcurrencycodeiso IS NOT NULL 
        AND fc.iscurrencydependent = 1 
        AND 
      lid.statementcurrencycodeiso <> lid.reportedcurrencycodeiso 
        AND fc.isflowitem = 1) THEN 
lid.lineiteminstancevalue * 
cds.dbo.Exrate(lid.reportedcurrencycodeiso, lid.statementcurrencycodeiso, p.periodenddate) 
    WHEN (lid.reportedcurrencycodeiso IS NOT NULL 
     AND fc.iscurrencydependent = 1 
     AND lid.statementcurrencycodeiso <> lid.reportedcurrencycodeiso 
     AND fc.isflowitem = 0 
     AND p.periodlengthunitcode = 'M') THEN lid.lineiteminstancevalue 
* 
cds.dbo.Getaveragefxrate(lid.reportedcurrencycodeiso, lid.statementcurrencycodeiso, 
Dateadd("MONTH", -p.periodlength, p.periodenddate), p.periodenddate) 
    WHEN (lid.reportedcurrencycodeiso IS NOT NULL 
     AND fc.iscurrencydependent = 1 
     AND lid.statementcurrencycodeiso <> lid.reportedcurrencycodeiso 
     AND fc.isflowitem = 0 
     AND p.periodlengthunitcode = 'W') THEN lid.lineiteminstancevalue 
* 
cds.dbo.Getaveragefxrate(lid.reportedcurrencycodeiso, lid.statementcurrencycodeiso, 
Dateadd("WEEK", -p.periodlength, p.periodenddate), p.periodenddate) 
    ELSE lid.lineiteminstancevalue 
END)   AS LineItemInstanceValue, 
(CASE 
    WHEN (lid.reportedcurrencycodeiso IS NOT NULL 
      AND fc.iscurrencydependent = 1 
      AND lid.statementcurrencycodeiso <> lid.reportedcurrencycodeiso 
      AND fc.isflowitem = 1) THEN 
lid.adjustedforcorporateactionvalue * 
cds.dbo.Exrate(lid.reportedcurrencycodeiso, lid.statementcurrencycodeiso, p.periodenddate) 
    WHEN (lid.reportedcurrencycodeiso IS NOT NULL 
     AND fc.iscurrencydependent = 1 
     AND lid.statementcurrencycodeiso <> lid.reportedcurrencycodeiso 
     AND fc.isflowitem = 0 
     AND p.periodlengthunitcode = 'M') THEN 
    lid.adjustedforcorporateactionvalue 
* 
cds.dbo.Getaveragefxrate(lid.reportedcurrencycodeiso, lid.statementcurrencycodeiso, 
Dateadd("MONTH", -p.periodlength, p.periodenddate), p.periodenddate) 
    WHEN (lid.reportedcurrencycodeiso IS NOT NULL 
     AND fc.iscurrencydependent = 1 
     AND lid.statementcurrencycodeiso <> lid.reportedcurrencycodeiso 
     AND fc.isflowitem = 0 
     AND p.periodlengthunitcode = 'W') THEN 
    lid.adjustedforcorporateactionvalue 
* 
cds.dbo.Getaveragefxrate(lid.reportedcurrencycodeiso, lid.statementcurrencycodeiso, 
Dateadd("WEEK", -p.periodlength, p.periodenddate), p.periodenddate) 
    ELSE lid.adjustedforcorporateactionvalue 
END)   AS AdjustedForCorporateActionValue, 
lid.reportedcurrencycodeiso, 
lid.xbrlelementid, 
xbrlele.xbrlelementname, 
Cast(NULL AS CHAR(3)), 
Cast(NULL AS DATETIME), 
Cast(NULL AS DATETIME), 
Cast(NULL AS CHAR(1)), 
Cast(NULL AS DATETIME), 
Cast(NULL AS SMALLINT), 
src.dcn, 
src.docformat, 
lid.asreporteditemid, 
ari.docbyteoffset, 
ari.docbytelength, 
ari.bookmark, 
ari.itemdisplayednegativeflag, 
ari.itemscalingfactor, 
ari.itemdisplayedvalue, 
ari.reportedvalue, 
ari.reporteddescription, 
ari.editeddescription, 
src.documentid, 
lid.isderived, 
lid.statementsectioncode, 
IsMissMatchPhysicalMeasureID =0, 
lid.istotal, 
lid.isexcludedfromstandardization, 
si.isdetailed AS IsDetailedSection, 
si.ispreliminary AS IsPreliminary, 
IsCreditSection =Cast(NULL AS BIT), 
IsCreditFCC =Cast(NULL AS BIT), 
si.isproforma, 
lll.instrumentndaid, 
InterimTypeID = CASE p.periodicitycode 
        WHEN 'A' THEN 0 
        WHEN 'S' THEN 2 
        WHEN 'T' THEN 3 
        WHEN 'Q' THEN 4 
       END, 
si.isnotcomparabletopriorperiod, 
si.isfundbspecial, 
si.isderived  AS IsDerivedSI, 
lid.systemderivedtypecode 
--FBLog.tasktypeid, 
--FBLog.systemstartdatetime, 
--FBLog.issplit 
FROM trf.dbo.lineiteminstance LID(nolock) 
     --INNER JOIN #fundbbackwardlog FBLog 
     --  ON FBLog.orgid = lid.orgid 
     --   AND FBLog.periodid = lid.periodid 
     --   AND FBLog.sourceid = lid.sourceid 
     --   AND FBLog.statementtypecode = lid.statementtypecode 
     --   AND FBLog.financialsbucketid = lid.financialsbucketid 
     --   AND FBLog.statementcurrencycodeiso = 
     --    lid.statementcurrencycodeiso 
     --   AND lid.asreporteditemid IS NOT NULL 
     --   AND lid.lineiteminstanceasreporteditemid IS NULL 
     INNER JOIN trf.dbo.statementinstance SI(nolock) 
       ON lid.orgid = si.orgid 
        AND lid.periodid = si.periodid 
        AND lid.sourceid = si.sourceid 
        AND lid.statementtypecode = si.statementtypecode 
        AND lid.financialsbucketid = si.financialsbucketid 
        AND lid.statementcurrencycodeiso = si.statementcurrencycodeiso 
     INNER JOIN trf.dbo.period P(nolock) 
       ON lid.orgid = p.orgid 
        AND lid.periodid = p.periodid 
     INNER JOIN trf.dbo.lineitem LLL(nolock) 
       ON lll.orgid = lid.orgid 
        AND lll.lineitemid = lid.lineitemid 
     INNER JOIN trf.dbo.financialconcept FC(nolock) 
       ON lll.financialconceptidglobal = fc.financialconceptid 
     LEFT OUTER JOIN trf.dbo.xbrlelement XBRLEle(nolock) 
        ON lid.xbrlelementid = xbrlele.xbrlelementid 
     INNER JOIN trf.dbo.asreportedinstance ARI(nolock) 
       ON lid.orgid = ari.orgid 
        AND lid.sourceid = ari.sourceid 
        AND lid.asreporteditemid = ari.asreporteditemid 
     INNER JOIN trf.dbo.[source] SRC(nolock) 
       ON src.orgid = ari.orgid 
        AND src.sourceid = ari.sourceid 
WHERE ari.reportedvalue IS NOT NULL --AND SRC.DCN > ''   --AND SRC.DocFormat > ''   --AND ARI.BookMark > ''  

Answer 1

尝试删除函数调用查询，如：Exrate（）和Getaveragefxrate（）。

还要更改case语句，您在哪里使用子查询如下。

在查询结束后，使用

left outer join trf.lineitemfundbdescription lifd 
    on lll.orgid = lifd.orgid and lll.lineitemid = lifd.lineitemid 

，而该案件将被更改为

case 
    when lifd.orgid is null then lll.lineitemname 
    else lifd.lineitemshortdescription End As LineItemName 

将微调您的查询的水平，并给你一个正确的执行计划并提出相应建议。

请记住，执行计划不会显示查询中调用的用户定义函数的计划。