[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-2536) NPE with custom SQL query and formula property

[Diego Pires Plentz (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Diego Pires Plentz resolved HHH-2536.
-------------------------------------

      Assignee: Diego Pires Plentz
    Resolution: Duplicate

> NPE with custom SQL query and formula property
> ----------------------------------------------
>
>                 Key: HHH-2536
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2536
>             Project: Hibernate3
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.2.1
>            Reporter: Jörg Heinicke
>            Assignee: Diego Pires Plentz
>            Priority: Minor
>
> I have an object Balance which I map like the following (stripped):
> <class name="Balance" entity-name="Balance" table="BALANCE">
>     ...
>     <property name="reportDate" column="report_date" type="..." not-null="true"/>
>     <property name="year" formula="year(report_date)" type="..."/>
> </class>
> Now I have another object which is actually a cumulated view of the BALANCE table. For retrieving the values I use a custom SQL query. The mapping is almost the same (it is at least for the properties in question, but e.g. the ID mapping is different as it is a cumulated view).
> <class name="PaymentStatisticsData">
>     ...
>     <property name="reportDate" column="report_date" type="..." not-null="true"/>
>     <property name="year" formula="year(report_date)" type="..."/>
>     <loader query-ref="paymentStatisticsData"/>
> </class>
> <sql-query name="paymentStatisticsData" read-only="true">
>     <return class="PaymentStatisticsData"/>
>     select ...
> </sql-query>
> In theory there should be no difference, but the latter fails with the following NPE:
> Caused by: java.lang.NullPointerException
> 	at org.hibernate.loader.DefaultEntityAliases.intern(DefaultEntityAliases.java:133)
> 	at org.hibernate.loader.DefaultEntityAliases.getSuffixedPropertyAliases(DefaultEntityAliases.java:106)
> 	at org.hibernate.loader.DefaultEntityAliases.<init>(DefaultEntityAliases.java:52)
> 	at org.hibernate.loader.ColumnEntityAliases.<init>(ColumnEntityAliases.java:16)
> 	at org.hibernate.loader.custom.sql.SQLQueryReturnProcessor.generateCustomReturns(SQLQueryReturnProcessor.java:174)
> 	at org.hibernate.loader.custom.sql.SQLCustomQuery.<init>(SQLCustomQuery.java:129)
> 	at org.hibernate.engine.query.NativeSQLQueryPlan.<init>(NativeSQLQueryPlan.java:43)
> 	at org.hibernate.engine.query.QueryPlanCache.getNativeSQLQueryPlan(QueryPlanCache.java:114)
> 	at org.hibernate.impl.SessionFactoryImpl.checkNamedQueries(SessionFactoryImpl.java:444)
> 	at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:351)
> 	at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1291)
> Hope that's all information you need.
> Joerg

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