id element has 'column' attribute, then the pk column is nullable in ddl created by schema export --------------------------------------------------------------------------------------------------- Key: HHH-6703 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6703 Project: Hibernate Core Issue Type: Bug Components: metamodel Affects Versions: 4.0.0.CR4 Reporter: Strong Liu this can be reproduced by org.hibernate.test.discriminator.SimpleInheritanceTest#testDiscriminatorSubclass in SimpleInheritance.hbm.xml: {code:xml} <id name="id" column="person_id" unsaved-value="0"> <generator class="assigned"/> </id> {code} and sql generated is {quote} create table "Person" ( "person_id" bigint, "TYPE" char(255), "name" varchar(255) not null, "sex" char(255) not null, "title" varchar(255), "salary" decimal(19,2), "comments" varchar(255), primary key ("person_id") ) {quote} if we remove that _column="person_id"_, then it changes to {quote} create table "Person" ( "id" bigint not null, "TYPE" char(255), "name" varchar(255) not null, "sex" char(255) not null, "title" varchar(255), "salary" decimal(19,2), "comments" varchar(255), primary key ("id") ) {quote} -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira