[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2828) criteria search by class throws org.hibernate.QueryException: Unsupported discriminator type null when mapping exists for this class

criteria search by class throws org.hibernate.QueryException: Unsupported discriminator type null when mapping exists for this class ------------------------------------------------------------------------------------------------------------------------------------- Key: HHH-2828 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2828 Project: Hibernate3 Issue Type: Bug Components: core Affects Versions: 3.2.5 Environment: hibernate 3.2.5, oracle 10g Reporter: jo desmet Attachments: src.zip when making a criteria based on a property of type class the query succeeds if this class is not mapped, the query building fails when this class is mapped within hibernate and has no discriminator e.g. code : Criteria l = session.createCriteria(SearchClass.class); l.add(Restrictions.eq("type", ClassWithNoMapping.class)); // SUCCESS java.util.List result = l.list(); l = session.createCriteria(SearchClass.class); l.add(Restrictions.eq("type", ClassWithMapping.class)); // EXCEPTION result = l.list(); exception is Hibernate: select this_.ID as ID0_0_, this_.name as name0_0_, this_.type as type0_0_ from SEARCHCLASS this_ where this_.type=? org.hibernate.QueryException: Unsupported discriminator type null at org.hibernate.loader.criteria.CriteriaQueryTranslator.getTypedValue(CriteriaQueryTranslator.java:499) at org.hibernate.criterion.SimpleExpression.getTypedValues(SimpleExpression.java:71) at org.hibernate.loader.criteria.CriteriaQueryTranslator.getQueryParameters(CriteriaQueryTranslator.java:251) at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:95) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1569) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:283) at Test.list(Test.java:40) at Test.main(Test.java:27) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90) classes are attached, tables should exists but no data is required. Please also provide workaround on short term if possible