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  1. PO
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    copied!<p>finally found a way to do it. So I replaced with and created one for Abstract class too. Not sure if it is a bug with EclipseLink. And another issue is using generated-value strategy "SEQUENCE" (may be others) is not generating sequences properly. </p> <p>My orm looks like below </p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8" standalone="yes"?&gt; &lt;entity-mappings xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/orm" version="2.3"&gt; &lt;persistence-unit-metadata&gt; &lt;exclude-default-mappings /&gt; &lt;/persistence-unit-metadata&gt; &lt;entity class="ABC"&gt; &lt;table name="" /&gt; &lt;attributes&gt; &lt;id .......&gt; &lt;/id&gt; &lt;basic name="ts" attribute-type="long" /&gt; &lt;one-to-one name="field-referring-to-abstract-class" &gt; &lt;join-column name="ABSTRACT_ID"/&gt; &lt;cascade&gt; &lt;cascade-all /&gt; &lt;/cascade&gt; &lt;/one-to-one&gt; &lt;/attributes&gt; &lt;/entity&gt; &lt;entity class="ABSTRACT-CLASS" &gt; &lt;table name="ABSTRACT-TABLE"/&gt; &lt;inheritance strategy="TABLE_PER_CLASS" /&gt; &lt;attributes&gt; &lt;id name="ABSTRACT_ID" attribute-type="String" &gt; &lt;column name="ABSTRACT_ID" /&gt; &lt;/id&gt; &lt;/attributes&gt; &lt;/entity&gt; &lt;entity class="SUB-CLASS1-TO-ABSTRACT" access="FIELD"&gt; &lt;table name="SUBCLASS1"/&gt; &lt;attributes&gt; &lt;basic name="name" attribute-type="String" /&gt; &lt;basic name="age" attribute-type="int" /&gt; &lt;/attributes&gt; &lt;/entity&gt; &lt;entity class="SUB-CLASS2-TO-ABSTRACT" access="FIELD"&gt; &lt;table name="SUBCLASS2"/&gt; &lt;attributes&gt; &lt;basic name="city" attribute-type="String" /&gt; &lt;basic name="zipcode" attribute-type="int" /&gt; &lt;/attributes&gt; &lt;/entity&gt; &lt;/entity-mappings&gt; </code></pre> <p>so, this is storing to appropriate tables as we as reading provided PK in subclasses I provide holds uniqueness. </p> <p>hope this helps thanks Gopi</p>
 

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