Allow nullable columns in a composite-id ---------------------------------------- Key: HHH-947 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-947 Project: Hibernate Core Issue Type: Improvement Components: core Environment: Hibernate 3.0.5, Oracle 9.2 Reporter: Patrick Higgins We have some tables that don't have a primary key, but do have a unique index with nullable columns in it. This is a conceptually broken data model, but code maintains the semantics that NULL = NULL which the database does not enforce. Mapping these tables with Hibernate 3 does not work because any record with a NULL value in a composite-id field returns a null in query results. I have not looked at INSERT/UPDATE behavior, but it is likely broken, too. It seems that Hibernate should be able to maintain the semantics that NULL = NULL, as well.