Different behavior between annotation and mapping for map key ------------------------------------------------------------- Key: ANN-549 URL: http://opensource.atlassian.com/projects/hibernate/browse/ANN-549 Project: Hibernate Annotations Type: Bug Components: binder Versions: 3.2.1 Environment: H3.2 Reporter: Anthony Patricio Fix For: 3.2.2 Attachments: MapNullableColumn_Annotation.zip, MapNullableColumn_Mappings.zip these metadatas should be considered as equivalent: @org.hibernate.annotations.MapKeyManyToMany @ManyToMany(cascade = CascadeType.ALL) private Map<Security, Position> positions = new HashMap<Security, Position>(); <map name="positions" table="account_position" cascade="save-update"> <key column="account_id" /> <map-key-many-to-many class="Security" column="security_id"/> <many-to-many class="Position" column="position_id"/> </map> But we can from the generated schema that they are not: - annotation consider the map key as nullable column create table Account_Position (Account_id varchar(255) not null, positions_id bigint not null, mapkey_id varchar(255), primary key (Account_id, mapkey_id)) - whereas mapping files consider the map key as a not-nullable column create table account_position (account_id varchar(255) not null, position_id bigint not null, security_id varchar(255) not null, primary key (account_id, security_id)) Maybe there are more side effects. Attached are 2 testcases. -- 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