Db2 为什么我的查询在SQLCODE=-204时失败？

我正在为一个报告编写一些SQL（这是我第一次真正编写SQL，所以请不要过多地使用我的语法，lol），子查询似乎失败了。我不知道为什么，因为报告编译得很好，我可以在预览时出错之前将其放入Jaspersoft Studio。我是否正确地执行子查询

提前谢谢

SELECT
    PERSON.LAST_NAME,
    ACCOUNT.ACCOUNT_NUMBER, 
    SHARE_ESCROW.ID,
    LOAN.PAYMENT_DUE_DATE, 
    LN_IMPOUND_ANALYSIS.CUSHION_AMOUNT, 
    LN_IMPOUND_ANALYSIS.NEXT_P_AND_I_AMOUNT,
    LOAN.IMPOUND_AMOUNT,
    LN_IMPOUND_ANALYSIS.NEXT_IMPOUND_AMOUNT,
    SHARE_ESCROW.BALANCE, 
    SHARE_ESCROW.DESCRIPTION, 
    SHARE_ESCROW.CLOSE_DATE,
    i.LTV,
    CASE LOAN.PAYMENT_METHOD
        WHEN 'T' THEN 'Automated Transfer'
        WHEN 'A' THEN 'ACH'
        WHEN 'C' THEN 'Cash'
    END AS PAYMENT_METHOD
FROM    
    CORE.ACCOUNT AS ACCOUNT INNER JOIN CORE.LOAN AS LOAN ON ACCOUNT.SERIAL = LOAN.PARENT_SERIAL INNER JOIN
    CORE.LN_IMPOUND_ANALYSIS AS LN_IMPOUND_ANALYSIS ON LOAN.SERIAL = LN_IMPOUND_ANALYSIS.PARENT_SERIAL INNER JOIN
    CORE.SHARE AS SHARE_ESCROW ON ACCOUNT.SERIAL = SHARE_ESCROW.PARENT_SERIAL INNER JOIN
    CORE.PERSON AS PERSON ON PERSON.SERIAL = ACCOUNT.PRIMARY_PERSON_SERIAL,
    (SELECT 
        CASE COLLATERAL.AMOUNT
            WHEN 0 THEN 0
            WHEN NULL THEN 0
            ELSE LOAN.BALANCE / COLLATERAL.AMOUNT
        END AS LTV

    FROM
        CORE.COLLATERAL AS COLLATERAL INNER JOIN LOAN ON LOAN.SERIAL = COLLATERAL.PARENT_SERIAL
    ) i
WHERE
    SHARE_ESCROW.DESCRIPTION = 'Escrow Share' AND 
    SHARE_ESCROW.CLOSE_DATE IS NULL AND
    i.LTV != 0

编辑： 以下是错误：

net.sf.jasperreports.engine.JRException: net.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: Error executing SQL statement for : Escrow32Analysis324532WIP_TableDataset_1579697577915_289752
    at com.jaspersoft.studio.editor.preview.view.control.ReportControler.fillReport(ReportControler.java:466)
    at com.jaspersoft.studio.editor.preview.view.control.ReportControler.access$18(ReportControler.java:441)
    at com.jaspersoft.studio.editor.preview.view.control.ReportControler$4.run(ReportControler.java:333)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: net.sf.jasperreports.engine.JRRuntimeException: net.sf.jasperreports.engine.JRException: Error executing SQL statement for : Escrow32Analysis324532WIP_TableDataset_1579697577915_289752
    at net.sf.jasperreports.engine.fill.JRFillSubreport.prepare(JRFillSubreport.java:809)
    at net.sf.jasperreports.components.table.fill.FillTableSubreport.prepareSubreport(FillTableSubreport.java:156)
    at net.sf.jasperreports.components.table.fill.FillTable.prepare(FillTable.java:400)
    at net.sf.jasperreports.engine.fill.JRFillComponentElement.prepare(JRFillComponentElement.java:151)
    at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:332)
    at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:384)
    at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:358)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillSummaryNoLastFooterSamePage(JRVerticalFiller.java:1102)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillSummary(JRVerticalFiller.java:1065)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportEnd(JRVerticalFiller.java:329)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:159)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:963)
    at net.sf.jasperreports.engine.fill.BaseFillHandle$ReportFiller.run(BaseFillHandle.java:120)
    at java.lang.Thread.run(Unknown Source)
Caused by: net.sf.jasperreports.engine.JRException: Error executing SQL statement for : Escrow32Analysis324532WIP_TableDataset_1579697577915_289752
    at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.createDatasource(JRJdbcQueryExecuter.java:240)
    at net.sf.jasperreports.engine.fill.JRFillDataset.createQueryDatasource(JRFillDataset.java:1114)
    at net.sf.jasperreports.engine.fill.JRFillDataset.initDatasource(JRFillDataset.java:691)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.setParameters(JRBaseFiller.java:1314)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:931)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:873)
    at net.sf.jasperreports.engine.fill.JRFillSubreport.fillSubreport(JRFillSubreport.java:665)
    at net.sf.jasperreports.engine.fill.JRSubreportRunnable.run(JRSubreportRunnable.java:59)
    at net.sf.jasperreports.engine.fill.AbstractThreadSubreportRunner.run(AbstractThreadSubreportRunner.java:203)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    ... 1 more
Caused by: com.ibm.db2.jcc.am.SqlSyntaxErrorException: DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=CMURPHY.LOAN, DRIVER=4.13.127
    at com.ibm.db2.jcc.am.id.a(id.java:677)
    at com.ibm.db2.jcc.am.id.a(id.java:60)
    at com.ibm.db2.jcc.am.id.a(id.java:127)
    at com.ibm.db2.jcc.am.no.c(no.java:2653)
    at com.ibm.db2.jcc.am.no.d(no.java:2641)
    at com.ibm.db2.jcc.am.no.a(no.java:2090)
    at com.ibm.db2.jcc.am.oo.a(oo.java:7671)
    at com.ibm.db2.jcc.t4.cb.h(cb.java:141)
    at com.ibm.db2.jcc.t4.cb.b(cb.java:41)
    at com.ibm.db2.jcc.t4.q.a(q.java:32)
    at com.ibm.db2.jcc.t4.sb.i(sb.java:135)
    at com.ibm.db2.jcc.am.no.ib(no.java:2059)
    at com.ibm.db2.jcc.am.oo.sc(oo.java:3559)
    at com.ibm.db2.jcc.am.oo.b(oo.java:4348)
    at com.ibm.db2.jcc.am.oo.fc(oo.java:743)
    at com.ibm.db2.jcc.am.oo.executeQuery(oo.java:713)
    at net.sf.jasperreports.engine.query.JRJdbcQueryExecuter.createDatasource(JRJdbcQueryExecuter.java:233)
    ... 11 more

---

您在日志中看到的消息：

DB2 SQL Error: SQLCODE=-204, SQLSTATE=42704, SQLERRMC=CMURPHY.LOAN

意味着在模式

CMURPHY

中找不到对象（在您的示例中是一个表）

LOAN

（SQLCODE-204）。正如其他人在注释中提到的，查询中唯一缺少显式架构的表引用是：

FROM 
    CORE.COLLATERAL AS COLLATERAL INNER JOIN LOAN ON LOAN.SERIAL ...
---------------------------------------------^^^^

因此，默认情况下，数据库服务器在默认模式中查找该表，即与您的用户ID（CMURPHY）匹配的表。显然它不在那里

将显式架构名称添加到表引用：

FROM 
    CORE.COLLATERAL AS COLLATERAL INNER JOIN CORE.LOAN AS LOAN ON LOAN.SERIAL ...

---

对于行

CORE.COLLATERAL AS COLLATERAL in JOIN LOAN ON LOAN.SERIAL

尝试替换为

CORE.COLLATERAL AS COLLATERAL in JOIN CORE.LOAN AS LOAN ON LOAN.SERIAL

这是否回答了您的问题？您可以使用内置本地Db2语法解析的SQL编辑器，这有助于发现此类错误。请看IBM Data Studio或IBM DB2数据库管理控制台，这非常有意义，谢谢。它现在似乎起作用了。