GenericJDBCException when querying on one-to-one association ------------------------------------------------------------ Key: HHH-1528 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1528 Project: Hibernate Core Issue Type: Bug Affects Versions: 3.1.2 Environment: Hibernate 3.1.2, MySQL 4.1, Java 5 Reporter: Alexander Dvorkovyy Attachments: src.zip I am getting following stack trace: Exception in thread "main" org.hibernate.exception.GenericJDBCException: could not execute query at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:91) at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:79) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43) at org.hibernate.loader.Loader.doList(Loader.java:2148) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2029) at org.hibernate.loader.Loader.list(Loader.java:2024) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:375) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:308) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:153) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1129) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79) at BugDemo.main(BugDemo.java:28) 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:585) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:86) Caused by: java.sql.SQLException: Statement parameter 1 not set. at com.mysql.jdbc.ServerPreparedStatement.serverExecute(ServerPreparedStatement.java:1031) at com.mysql.jdbc.ServerPreparedStatement.executeInternal(ServerPreparedStatement.java:676) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1030) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:139) at org.hibernate.loader.Loader.getResultSet(Loader.java:1669) at org.hibernate.loader.Loader.doQuery(Loader.java:662) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.doList(Loader.java:2145) ... 13 more while executing this code: OneClass one = (OneClass) session.load(OneClass.class, 1L); Query query = session.createQuery("FROM OneToOneClass oto WHERE oto.whatever=:whatever"); query.setParameter("whatever", one); query.list(); // < - - Exception is thrown here on this domain model (I used annotations here, same thing with hbm.xml): @Entity public class OneClass { @Id private Long id; } @Entity public class OneToOneClass { @Id private Long id; @OneToOne @PrimaryKeyJoinColumn private OneClass whatever; } Problem first appeared in 3.1 (also when using xml mapping files), in 3.0 no problem. Full source code attached. Would be nice if the problem can be fixed in upcoming 3.1.3