[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3783) Save throws unique constraint violation: Object having a composite-key with constraint on one of the columns

Save throws unique constraint violation: Object having a composite-key with constraint on one of the columns ------------------------------------------------------------------------------------------------------------ Key: HHH-3783 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3783 Project: Hibernate Core Issue Type: Bug Environment: HIbernate 3.2.5.ga; Database: Oracle Reporter: Soorjith Kombilath I have a hibernate object with composite key - <composite-id> <key-many-to-one name="parent" column="PARENT_NUMBER" class="com.test.entity.impl.ParentImpl" /> <key-property name="restraintCode" column="RESTRAINT_CDE" type="string" /> </composite-id> In database there is a unique index on PARENT_NUMBER. Parent object may contain a collection of chjld objects. Whenever a child object is removed and a new child object is added, it throws unique constraint violation error. When I check the queries generated, hibernate is executing the queries for INSERT before executing DELETE. Is there any way to enforce DELETE before INSERTS? or am I missing to specify some attribute in my mapping?