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

[Jörg Heinicke (JIRA)]

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
            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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