[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2648) NPE in FromClause.java

[Heiko W. Rupp (JIRA)]

NPE in FromClause.java
----------------------

                 Key: HHH-2648
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2648
             Project: Hibernate3
          Issue Type: Bug
          Components: core
    Affects Versions: 3.2.1
         Environment: JBoss 4.2, JDK 1.5
            Reporter: Heiko W. Rupp


This JPA Query 

 query="SELECT m " +
                  "FROM MeasurementDataTrait AS m " + 
                  "WHERE m.schedule.resource.id = :resourceId" +
                 "    AND m.schedule.definition.displayType = :displayType " +
                 "    AND m.id.timestamp = (" +
                 "            SELECT MAX(mdt.id.timestamp) " +
                 "            FROM MeasurementDataTrait AS mdt" +
                 "            WHERE m.scheduleId = mdt.scheduleId" +
                 "    )" +
                 " GROUP BY m " +
                 " ORDER BY m.id.timestamp DESC"

Results in this NPE:
java.lang.NullPointerException
        at org.hibernate.hql.ast.tree.FromClause.findIntendedAliasedFromElementBasedOnCrazyJPARequirements(FromClause.java:120)
        at org.hibernate.hql.ast.tree.FromClause.getFromElement(FromClause.java:107)
        at org.hibernate.hql.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:81)
        at org.hibernate.hql.ast.tree.FromClause.addFromElement(FromClause.java:70)
        at org.hibernate.hql.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:255)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3056)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:2945)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:688)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:544)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.exprOrSubquery(HqlSqlBaseWalker.java:4049)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.comparisonExpr(HqlSqlBaseWalker.java:3528)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:1762)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.logicalExpr(HqlSqlBaseWalker.java:1690)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.whereClause(HqlSqlBaseWalker.java:776)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:577)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:281)
        at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:229)
        at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:228)
        at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:160)
        at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:111)
        at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:77)


When I remove the subselect, then the query gets parsed nicely.

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