我应该使用查询提示吗？

Question

SQL Server 2008 R2，Dynamics AX 2009 我们有这个丑陋的查询

DECLARE @P1 NVARCHAR(5), @P2 INT, @P3 INT, @P4 NVARCHAR(11), @P5 INT, @P6 NVARCHAR(5), @P7 NVARCHAR(11)SELECT A.SALESID,
   A.LINENUM,
   A.ITEMID,
   A.SALESSTATUS,
   A.LEDGERACCOUNT,
   A.NAME,
   A.EXTERNALITEMID,
   A.TAXGROUP,
   A.QTYORDERED,
   A.SALESDELIVERNOW,
   A.REMAINSALESPHYSICAL,
   A.REMAINSALESFINANCIAL,
   A.COSTPRICE,
   A.SALESPRICE,
   A.CURRENCYCODE,
   A.LINEPERCENT,
   A.LINEDISC,
   A.LINEAMOUNT,
   A.CONFIRMEDDLV,
   A.RESERVATION,
   A.SALESUNIT,
   A.DIMENSION,
   A.DIMENSION2_,
   A.DIMENSION3_,
   A.PRICEUNIT,
   A.PROJTRANSID,
   A.INVENTTRANSID,
   A.CUSTGROUP,
   A.CUSTACCOUNT,
   A.SALESQTY,
   A.SALESMARKUP,
   A.INVENTDELIVERNOW,
   A.MULTILNDISC,
   A.MULTILNPERCENT,
   A.SALESTYPE,
   A.BLOCKED,
   A.COMPLETE,
   A.REMAININVENTPHYSICAL,
   A.TRANSACTIONCODE,
   A.TAXITEMGROUP,
   A.TAXAUTOGENERATED,
   A.UNDERDELIVERYPCT,
   A.OVERDELIVERYPCT,
   A.BARCODE,
   A.BARCODETYPE,
   A.INVENTREFTRANSID,
   A.INVENTREFTYPE,
   A.INVENTREFID,
   A.ITEMBOMID,
   A.LINEHEADER,
   A.SCRAP,
   A.DLVMODE,
   A.INVENTTRANSIDRETURN,
   A.PROJCATEGORYID,
   A.PROJID,
   A.INVENTDIMID,
   A.TRANSPORT,
   A.STATPROCID,
   A.PORT,
   A.PROJLINEPROPERTYID,
   A.RECEIPTDATEREQUESTED,
   A.CUSTOMERLINENUM,
   A.REMAININVENTFINANCIAL,
   A.DELIVERYADDRESS,
   A.DELIVERYNAME,
   A.DELIVERYSTREET,
   A.DELIVERYZIPCODE,
   A.DELIVERYCITY,
   A.DELIVERYCOUNTY,
   A.DELIVERYSTATE,
   A.DELIVERYCOUNTRYREGIONID,
   A.DELIVERYTYPE,
   A.CUSTOMERREF,
   A.PURCHORDERFORMNUM,
   A.RECEIPTDATECONFIRMED,
   A.BLANKETREFTRANSID,
   A.STATTRIANGULARDEAL,
   A.SHIPPINGDATEREQUESTED,
   A.SHIPPINGDATECONFIRMED,
   A.ADDRESSREFRECID,
   A.ADDRESSREFTABLEID,
   A.EINVOICEACCOUNTCODE,
   A.DELIVERYDATECONTROLTYPE,
   A.ATPINCLPLANNEDORDERS,
   A.ATPTIMEFENCE,
   A.ACTIVITYNUMBER,
   A.RETURNALLOWRESERVATION,
   A.ITEMREPLACED,
   A.RETURNDEADLINE,
   A.EXPECTEDRETQTY,
   A.RETURNSTATUS,
   A.RETURNARRIVALDATE,
   A.RETURNCLOSEDDATE,
   A.RETURNDISPOSITIONCODEID,
   A.CUSTOMSNAME_MX,
   A.CUSTOMSDOCNUMBER_MX,
   A.CUSTOMSDOCDATE_MX,
   A.PROPERTYNUMBER_MX,
   A.REFRETURNINVOICETRANS_W,
   A.POSTINGPROFILE_RU,
   A.PRICEAGREEMENTDATE_RU,
   A.CORRECTIONDESC_PL,
   A.CREDITNOTEINTERNALREF_PL,
   A.DELIVERYFLAT_RU,
   A.DELIVERYBUILDING_RU,
   A.DELIVERYESTATE_RU,
   A.DELIVERYSTREETID_RU,
   A.DELIVERYSETTLEMENTID_RU,
   A.DELIVERYTOWNID_RU,
   A.RBOVARIANTID,
   A.HHTHANDHELDUSERID,
   A.HHTTRANSTIME,
   A.HHTTRANSDATE,
   A.ECC_PRICEGROUPID,
   A.ECC_SALESPRICECALC,
   A.ECC_CHEQUENUMBER,
   A.ECC_CHEQUEROWNUMBER,
   A.ECC_DOCUMENTCOMMENT,
   A.ECC_SHOPASSISTANT,
   A.ECC_SALEDATEFROMCOMISS,
   A.ECC_CARDNUMBER,
   A.ECC_ISPRESENTS,
   A.ECC_ISHOPSALESID,
   A.ECC_ISHOPPOSTPACKAGENUMBER,
   A.ECC_ISHOPINVENTTRANSFERCREATED,
   A.ECC_ISHOPINVENTTRANSFERLI50013,
   A.ECC_DISTRIBUTIONRATING,
   A.ECC_CASHNUMBER,
   A.ECC_ISHOPRRN,
   A.ECC_ISHOPSHIPPINGINVENTLO50017,
   A.ECC_ISHOPINVENTTRANSFERRE50018,
   A.ECC_ISHOPSALESLINESALECREATED,
   A.ECC_ISHOPINTEGRATIONPAYMETHOD,
   A.ECC_ISHOPPROCESSQTY,
   A.ECC_ISHOPFINISHED,
   A.ECC_RBOLOYALTYNUMBERCARD,
   A.ECC_ISHOPBONUSESPOINTS,
   A.ECC_ISHOPRATINGSPOINTS,
   A.ECC_RBOLOYALTYPOINTSACCUM50026,
   A.ECC_ISHOPTRANSDATETIME,
   A.ECC_ISHOPTRANSDATETIMETZID,
   A.ECC_ISHOPEXTRAPOINTSPAY,
   A.ECC_ISHOPBONUSESPOINTSPAY,
   A.ECC_ISHOPPICKUPINVENTLOCA50030,
   A.ECC_ISHOPSALESRESERVE,
   A.ECC_RBONETAMOUNT,
   A.ECC_RBOTAXAMOUNT,
   A.MODIFIEDDATETIME,
   A.CREATEDDATETIME,
   A.RECVERSION,
   A.RECID,
   B.INVENTCOLORID,
   B.INVENTSIZEID,
   B.INVENTLOCATIONID,
   B.ECC_BUSINESSUNITID,
   B.ECC_SEASONID,
   B.INVENTDIMID,
   B.RECVERSION,
   101090 FROM SALESLINE A,
 INVENTDIM B WHERE((A.DATAAREAID = @P1)
  AND ((((A.COMPLETE = @P2)
         AND (A.ECC_ISHOPSALESRESERVE = @P3))
        AND NOT((A.ECC_ISHOPSALESID = @P4)))
       AND (A.ECC_ISHOPFINISHED = @P5)))
 AND ((B.DATAAREAID = @P6)
      AND ((B.INVENTLOCATIONID = @P7)
           AND (A.INVENTDIMID = B.INVENTDIMID))) ORDER BY A.DATAAREAID DESC,
     A.INVENTDIMID DESC OPTION(FAST 1, LOOP JOIN, FORCE ORDER);

我认为这里使用的查询选项并不是我们实际应该对这个特定查询做的事情，以试图使其更快。它在我们的系统上运行非常缓慢。计划在这里： 查询计划 将不胜感激任何帮助

Answer 1

首先，您粘贴的计划与您发布的查询不完全匹配，因为 AX 在后台使用 API_CURSOR。

除此之外，这是您（或供应商）开发人员编写的自定义查询。（所有 ECC_* 字段都是非标准的）并且所有这些提示都是由该开发人员明确添加的。

您看到的 3 个选项

• FAST 1
• LOOP JOIN
• FORCE ORDER

使用这些关键字添加到自定义代码中

• firstFast
• forceNestedLoop
• forceSelectOrder

请参阅选择语句语法。

我建议您做的是与您的开发人员交谈并询问他为什么在代码中添加所有这些提示。

由于添加到SALESLINE表中的所有这些字段都是通过自定义添加的，因此请确保它们被正确索引，然后尝试删除所有无意义的关键字。