[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3415) Bugs in some Criteria-Expressions!

[Max Hartmann (JIRA)]

Bugs in some Criteria-Expressions!
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                 Key: HHH-3415
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3415
             Project: Hibernate3
          Issue Type: Bug
    Affects Versions: 3.3.0.CR1, 3.2.6
         Environment: javase 5, postgresql 8
            Reporter: Max Hartmann


I think there is a bug in some Criteria-Criterions:

e.g. NotNullExpression:
When I make an AliasProjection with the same name as the propertyName of the NotNullExpression, hibernate throws an exception.
I think this exception occurs because referencing aliases in the WHERE-CLAUSE are not alowed in SQL (NotNullExpression.toSQLString() invokes CriteriaQuery.getColumnsUsingProjection() to use aliases for the where-clause).

Code:
List<?> result = s.createCriteria(Test.class, "t1")
			.createCriteria("test1", "t2")
			.add(Restrictions.isNotNull("id"))
			.setProjection(Projections.distinct(Projections.property("t2.id").as("id")))
			.list(); 

Generated SQL:
select distinct t2x1_.id as y0_ from test this_ inner join test t2x1_ on this_.id=t2x1_.test1_id where y0_ is not null

Exception:
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not execute query
	at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
	at org.hibernate.loader.Loader.doList(Loader.java:2208)
	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2102)
	at org.hibernate.loader.Loader.list(Loader.java:2097)
	at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:96)
	at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1573)
	at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283)
	at org.hibernate.impl.CriteriaImpl$Subcriteria.list(CriteriaImpl.java:458)
	at test.TestApplication.main(TestApplication.java:52)
Caused by: org.postgresql.util.PSQLException: ERROR: column "y0_" does not exist
	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1592)
	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1327)
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:192)
	at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:451)
	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:350)
	at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:254)
	at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:184)
	at org.hibernate.loader.Loader.getResultSet(Loader.java:1785)
	at org.hibernate.loader.Loader.doQuery(Loader.java:674)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
	at org.hibernate.loader.Loader.doList(Loader.java:2205)
	... 7 more


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