Kodo 3.0 generates invalid SQL statement when deleting an instance

Question

Hi,
     kodo 3.0 generates an invalid SQL statement when deleting an instance
that has a one-many inverse unidirectional association.
All manipulations of the data go just fine except for the deletion of
instances of Whole without Parts. Kodo 3.0 generates the following SQL
statement UPDATE PART SET WHERE PARTID= ?.
This problem does not occur when using a bidirectional relationship
between Whole and Part. Is there an error in the mapping file somewhere?
Thanks in advance,
Stijn
database schema
<table name="PART">
<column name="PARTID" type="bigint"/>
<fk to-table="WHOLE">
<join column="PARTID" to-column="WHOLEID"/>
</fk>
</table>
<table name="WHOLE">
<column name="WHOLEID" type="bigint"/>
</table>
classes
public class Whole implements javax.jdo.InstanceCallbacks{
private java.util.Set parts = new java.util.HashSet();
public void jdoPreDelete {
     //implements cascading delete
public class Part implements javax.jdo.InstanceCallbacks{
private int partid;
mapping
<class name="Whole">
<field name="parts">
<jdbc-field-map type="one-many" column.PARTID="PARTID"
ref-column.WHOLEID="PARTID" table="PART"/>
</field>

Answer 1

This bug is caused by the fact that your FK is using a column that is
not nullable (in this case, because it is also a PK column). It is
definitely a bug on our side, but I wanted to let our users know that
most one-sided one-many relations won't exhibit this problem.
Thank you for the report; we will try to correct the problem in an
upcoming release.