在SSIS中，我有一个名为“ Contract”的变量，其表达式如下所示：
"SELECT C.CONTRACTNUM AS BL_CONTRACTNUM, C.EXTREFERENCE AS BL_EXTREFERENCE, C.REVISIONNUM AS BL_REVISIONNUM, A.BL_SERIALNUM, A.BL_DESCRIPTION, A.BL_COMPANY, A.BL_PARTNUM, CASE WHEN A.BL_WARRANTYSTARTDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_WARRANTYSTARTDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_WARRANTYSTARTDATE, CASE WHEN A.BL_WARRANTYENDDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_WARRANTYENDDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_WARRANTYENDDATE, C.CUSTOMER BL_CUSTOMER, A.BL_CONTRACTLINENUM, A.BL_COVERAGE, CASE WHEN A.BL_ENDOFMAINTDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_ENDOFMAINTDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_ENDOFMAINTDATE, CASE WHEN A.BL_ENDOFSALESDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_ENDOFSALESDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_ENDOFSALESDATE, CASE WHEN A.BL_ENDOFSUPPORTDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char(A.BL_ENDOFSUPPORTDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_ENDOFSUPPORTDATE, A.BL_CINUM, NULL as CIDESCRIPTION, C.STATUS, A.BL_ISLIGHTCI, A.BL_LOCATION, CASE WHEN A.BL_CREATEDDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_CREATEDDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_CREATEDDATE, CASE WHEN A.BL_CHANGEDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_CHANGEDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_CHANGEDATE, A.BL_CHANGEBY, CASE WHEN A.BL_LOCATIONCHANGEDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_LOCATIONCHANGEDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_LOCATIONCHANGEDATEFROM MAXIMOMIS.BL_MSINV_CONTRACT CLEFT JOIN MAXIMOMIS.BL_MSINV_ALL_EQUIP A on C.CONTRACTNUM = A.BL_CONTRACTNUM AND C.REVISIONNUM = A.BL_REVISIONNUMLEFT JOIN MAXIMOMIS.BL_MSINV_MAXIMOCI CI ON CI.CINUM = a.BL_CINUM AND CI.SERIALNUMBER = a.BL_SERIALNUMWHERE C.EXTREFERENCE is not nullAND c.REVISIONNUM is not nullAND c.STATUS = 'APPR' " + (@[User::varLoadType] == "Daily" ? "AND (C.MODIFIEDDATE > (sysdate - " + @[User::varDays] + "))" : "")
当我评估此表达式时，我得到以下内容
SELECT C.CONTRACTNUM AS BL_CONTRACTNUM,C.EXTREFERENCE AS BL_EXTREFERENCE,C.REVISIONNUM AS BL_REVISIONNUM,A.BL_SERIALNUM,A.BL_DESCRIPTION,A.BL_COMPANY,A.BL_PARTNUM,CASE WHEN A.BL_WARRANTYSTARTDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_WARRANTYSTARTDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_WARRANTYSTARTDATE, CASE WHEN A.BL_WARRANTYENDDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_WARRANTYENDDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_WARRANTYENDDATE,C.CUSTOMER BL_CUSTOMER,A.BL_CONTRACTLINENUM, A.BL_COVERAGE,CASE WHEN A.BL_ENDOFMAINTDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_ENDOFMAINTDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_ENDOFMAINTDATE,CASE WHEN A.BL_ENDOFSALESDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_ENDOFSALESDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_ENDOFSALESDATE,CASE WHEN A.BL_ENDOFSUPPORTDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char(A.BL_ENDOFSUPPORTDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_ENDOFSUPPORTDATE,A.BL_CINUM,NULL as CIDESCRIPTION,C.STATUS,A.BL_ISLIGHTCI, A.BL_LOCATION,CASE WHEN A.BL_CREATEDDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_CREATEDDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_CREATEDDATE,CASE WHEN A.BL_CHANGEDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_CHANGEDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_CHANGEDATE,A.BL_CHANGEBY,CASE WHEN A.BL_LOCATIONCHANGEDATE < TO_DATE('01-01-1753','DD-MM-YYYY') THEN NULL ELSE to_char( A.BL_LOCATIONCHANGEDATE, 'YYYY-MM-DD HH24:MI:SS') END AS BL_LOCATIONCHANGEDATEFROM MAXIMOMIS.BL_MSINV_CONTRACT CLEFT JOIN MAXIMOMIS.BL_MSINV_ALL_EQUIP A on C.CONTRACTNUM = A.BL_CONTRACTNUM AND C.REVISIONNUM = A.BL_REVISIONNUM LEFT JOIN MAXIMOMIS.BL_MSINV_MAXIMOCI CI ON CI.CINUM = a.BL_CINUM AND CI.SERIALNUMBER = a.BL_SERIALNUM WHERE C.EXTREFERENCE is not null AND c.REVISIONNUM is not null AND c.STATUS = 'APPR' AND (C.MODIFIEDDATE > (sysdate - 7))
当我在Oracle sql / developer工具中运行以上查询时。我有18行。
但是，在运行时在执行sql任务中使用变量“合同”时，它将产生3775行。我已经设置了断点，并确保查询的值等于（在调试期间在监视窗口中）与上面相同的值。
因此，我对为什么在运行时不产生18行而不产生3775行感到困惑吗？
更令人困惑的是，除了select和join不同而且它们都能正常工作外，我还有其他表达式具有完全相似的表达式。
我什至检查了dtsx软件包<DtsVariable>的xml代码是否正确显示。我不确定我在这里缺少什么，有人可以指出是否有问题吗？