混淆了NHibernate的

Question

一個一對一的映射可有人建議我適當的映射在下列情況下使用：

父表 - AllTransactions

子表 - TranCategory1，TranCategory2和TranCategory3和另有8個。

所有十二個表共享相同的組合鍵。現在計算在於所有子表中的交易總和。子表只包含來自父表的唯一值。

我正在使用的映射如下所示。

我在Parent表中使用constrained =「true」只是爲了避免在Parent表的Select語句中形成連接。但是我想我反對'constrained'這個詞的定義，它指定了對於每個在transactionsnsactions中的事務，TranCategory1中都必須有一個事務。但實際上在我的設計中反過來也是如此。 那麼如何修改我的映射以複製正確的行爲並避免使用連接？

更新：我當前的映射在加入Parent和Child表時引發錯誤。請幫助我修改映射，以便可以在上述表上執行連接。

完全映射

Parent Table Mapping 

<composite-id name="Key" class="AccountEventKey"> 
    <key-property name="TransactionId" column="TRANSACTION_ID" type="long"/> 
    <key-property name="PartitionMonthNum" column="PARTITION_MONTH_NUM" type ="int"/> 
</composite-id> 

<many-to-one name="RefAuditQueue" class="RefAuditQueue"> 
    <column name="AUDIT_QUEUE_ID" not-null ="true"/> 
</many-to-one> 

<many-to-one name="RefAuditRule" class="RefAuditRules"> 
    <column name="AUDIT_RULE_ID" not-null ="false"/> 
</many-to-one> 

<many-to-one name="AccountDailyInfo" class="AccountDailyInfo"> 
    <column name="ACCOUNT_ID" length="19" not-null ="false"/> 
    <column name="ACCOUNT_INFO_PROCESSING_DATE" not-null="false"/> 
</many-to-one> 

<one-to-one name="DisclosureGroupChange" class="DisclosureGroupChanges" constrained="true"/> 

<bag name="AuditReviewAssignmentList" table="AUDIT_REVIEW_ASSIGNMENT" generic="true" inverse="true" cascade="save-update" lazy="true" > 
    <key> 
    <column name="TRANSACTION_ID" sql-type="long" not-null ="true"/> 
    <column name="PARTITION_MONTH_NUM" sql-type="int" not-null ="true"/> 
    </key> 
    <one-to-many class="AuditReviewAssignment"/> 
</bag> 

<property name="RacfId" type="string" not-null="false"> 
    <column name="RACFID" length="7"/> 
</property> 

<property name="EmployeeDailyAssignmentKey" type="long" not-null="false"> 
    <column name="EMP_DAILY_ASSIGNMENT_KEY"/> 
</property> 

<property name="AuditReviewRequiredInd" type="YesNo" not-null="false"> 
    <column name="AUDIT_REVIEW_REQUIRED_IND"/> 
</property> 

<property name="TransactionAmount" type="long" not-null="false"> 
    <column name="TRANSACTION_AMOUNT"/> 
</property> 

<property name="TransactionDate" type="Timestamp" not-null="false"> 
    <column name="TRANSACTION_DATE"/> 
</property> 

<property name="LastModifiedDate" type="Date" not-null="false"> 
    <column name="LAST_MODIFIED_DATE"/> 
</property> 

<property name="FirstAddedDate" type="Date" not-null="false"> 
    <column name="FIRST_ADDED_DATE"/> 
</property> 

<property name="AccountReferenceNum" type="string" not-null="false"> 
    <column name="ACCOUNT_REFERENCE_NUM" length="50"/> 
</property> 

<property name="CcaEtlRunNum" type="long" not-null="true"> 
    <column name="CCA_ETL_RUN_NUM"/> 
</property> 

1 Child Table Mapping (There are 10 more child tables) 

<composite-id name="Key" class="AccountEventKey"> 
    <key-property name="TransactionId" column="TRANSACTION_ID" type="long"/> 
    <key-property name="PartitionMonthNum" column="PARTITION_MONTH_NUM" type ="int"/> 
</composite-id> 

<many-to-one name="AccountEvent" class="AccountEvent" insert="false" update="false" unique="true"> 
    <column name="TRANSACTION_ID"/> 
    <column name="PARTITION_MONTH_NUM"/> 
</many-to-one>  

<property name="FrDisclosureGrpName" type="string" not-null="false"> 
    <column name="FR_DISCLOSURE_GRP_NAME" length="8"/> 
</property> 

<property name="ToDisclosureGrpName" type="string" not-null="false"> 
    <column name="TO_DISCLOSURE_GRP_NAME" length="8"/> 
</property> 

<property name="LastModifiedDate" type="Date" not-null="false"> 
    <column name="LAST_MODIFIED_DATE=" /> 
</property> 

<property name="FirstAddedDate" type="Date" not-null="false"> 
    <column name="FIRST_ADDED_DATE" /> 
</property> 

<property name="CcaEtlRunNum" type="long" not-null="true"> 
    <column name="CCA_ETL_RUN_NUM" /> 
</property> 

連接查詢資源ulting在錯誤

var query1 = _ses.CreateCriteria<AccountEvent>().CreateAlias("DisclosureGroupChange", "discGrp", NHibernate.SqlCommand.JoinType.InnerJoin).List<AccountEvent>() 

異常消息爲：

「ORA-00923：FROM關鍵字未找到預期\ n」 個

在異常消息

所示的SQL語句

SELECT this_.TRANSACTION_ID as TRANSACT1_15_1_, this_.PARTITION_MONTH_NUM as PARTITION2_15_1_, this_.AUDIT_QUEUE_ID as AUDIT3_15_1_, this_.AUDIT_RULE_ID as AUDIT4_15_1_, this_.ACCOUNT_ID as ACCOUNT5_15_1_, this_.ACCOUNT_INFO_PROCESSING_DATE as ACCOUNT6_15_1_, this_.RACFID as RACFID15_1_, this_.EMP_DAILY_ASSIGNMENT_KEY as EMP8_15_1_, this_.AUDIT_REVIEW_REQUIRED_IND as AUDIT9_15_1_, this_.TRANSACTION_AMOUNT as TRANSAC10_15_1_, this_.TRANSACTION_DATE as TRANSAC11_15_1_, this_.LAST_MODIFIED_DATE as LAST12_15_1_, this_.FIRST_ADDED_DATE as FIRST13_15_1_, this_.ACCOUNT_REFERENCE_NUM as ACCOUNT14_15_1_, this_.CCA_ETL_RUN_NUM as CCA15_15_1_, discgrp1_.TRANSACTION_ID as TRANSACT1_52_0_, discgrp1_.PARTITION_MONTH_NUM as PARTITION2_52_0_, discgrp1_.FR_DISCLOSURE_GRP_NAME as FR3_52_0_, discgrp1_.TO_DISCLOSURE_GRP_NAME as TO4_52_0_, discgrp1_.LAST_MODIFIED_DATE= as LAST5_52_0_, discgrp1_.FIRST_ADDED_DATE as FIRST6_52_0_, discgrp1_.CCA_ETL_RUN_NUM as CCA7_52_0_ FROM CCAPRD1O_AT.ACCOUNT_EVENT this_ inner join CCAPRD1O_AT.DISCLOSURE_GROUP_CHANGES discgrp1_ on this_.TRANSACTION_ID=discgrp1_.TRANSACTION_ID and this_.PARTITION_MONTH_NUM=discgrp1_.PARTITION_MONTH_NUM 

那麼我可以確認，這條消息只有當我在AccountEvent表中添加DisclosureGroupChanges的映射。首先我避免了這種映射，因爲我得到的錯誤。但現在我需要在這些表之間執行Join，根據我的知識，我們只能爲NHibernate中的相關表進行連接。如果我在這裏錯了，請糾正我。

Answer 1

我得到了我所犯的錯誤。

子表中的一個映射的值爲「LAST_MODIFIED_DATE =」。這總是導致我的錯誤。