I m using hibernate 3.2.5
I have following problem
I have two primary keys in a a table.

How do i write a constraints in a mapping file of a table which has got two
primary keys.Following is the file ......

<class name="payments" table="payments_tbl">

<id name="paymentId" type="int" column="paymentId" >
<generator class="assigned"/>
</id>

<id name="versionId" type="int" column="versionid" >
<generator class="assigned"/>
</id>

<many-to-one name="employeeId" class="personalDetails" column="employeeId"/>

<many-to-one name="clientMinorId" class="regionsClientsLocationsMappings" column="clientMinorId"/>

<property name="paymentDate">
<column name="paymentDate" />
</property>

<property name="chequeDate">
<column name="chequeDate"/>
</property>

<property name="installmentAmount"

Don't you mean a composite key? If so you're looking for <composite-key>