[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3362) NullPointerException in org.hibernate.dialect.Dialect$2.getReturnType

NullPointerException in org.hibernate.dialect.Dialect$2.getReturnType --------------------------------------------------------------------- Key: HHH-3362 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3362 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.2.6 Environment: Hibernate Core 3.6.2 GA, hsqldb Reporter: Istvan Kovacs Attachments: bug_src.zip java.lang.NullPointerException at org.hibernate.dialect.Dialect$2.getReturnType(Dialect.java:85) at org.hibernate.hql.ast.util.SessionFactoryHelper.findFunctionReturnType(SessionFactoryHelper.java:382) at org.hibernate.hql.ast.tree.AggregateNode.getDataType(AggregateNode.java:21) at org.hibernate.hql.ast.tree.SelectClause.initializeExplicitSelectClause(SelectClause.java:143) at org.hibernate.hql.ast.HqlSqlWalker.useSelectClause(HqlSqlWalker.java:705) at org.hibernate.hql.ast.HqlSqlWalker.processQuery(HqlSqlWalker.java:529) at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:645) 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) at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:56) at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:72) at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133) at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112) at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1623) at org.hibernate.console.HQLQueryPage.setSession(HQLQueryPage.java:106) at org.hibernate.console.ConsoleConfiguration$4.execute(ConsoleConfiguration.java:388) at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:65) at org.hibernate.console.ConsoleConfiguration.executeHQLQuery(ConsoleConfiguration.java:383) [...] 3 classes: Employee: Long ID; String name; Shop shop Shop: Long ID; String name; Set<Employee> employees; Map<Product, Integer> stock Product: Long ID; String name I mapped them to RDBMS using Hibernate. There's a table to hold stock info: SHOP_PRODUCT_STOCK - has fields SHOP_ID, PRODUCT_ID, AMOUNT SQL to query the average stock of each product: select p.name as name, avg(sps.amount) as avg_stock from Shop s, Shop_Product_Stock sps, Product p where sps.product_id=p.product_id and sps.product_id=p.product_id group by p.name order by p.name; Attempt in HQL that the produces exception: select p, avg(s.stock[p]) from Shop s, Product p group by p I've also tried SELECTing and GROUPing BY p.id and p.name. None of the three variants work.