Unique constraints on nullable columns should not be generated with unique-key is used and supportsNotNullUnique=false ---------------------------------------------------------------------------------------------------------------------- Key: ANN-481 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-481 Project: Hibernate Annotations Type: Bug Components: binder Versions: 3.2.0.ga Reporter: Emmanuel Bernard Assigned to: Emmanuel Bernard Fix For: 3.2.1 Derby and the DB2 family suffers from it. This limit the user ability to have a portable mapping -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira