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<title>Specifying additional tables</title>
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<p class="betadraftsubtitle">Beta Draft: 2013-01-03</p>
<p><a id="CIHGBIEI" name="CIHGBIEI"></a></p>
<div class="sect1"><!-- infolevel="all" infotype="General" -->
<h1>Specifying additional tables</h1>
<p><a id="sthref170" name="sthref170"></a><a id="sthref171" name="sthref171"></a><a id="sthref172" name="sthref172"></a>Add a secondary table annotation to an entity if its data is split across more than one table.</p>
<p>To add a secondary table to the entity,</p>
<ol>
<li>
<p>Select the entity in the <span class="gui-object-title">Project Explorer</span>.</p>
</li>
<li>
<p>In the <span class="gui-object-title">JPA Details</span> view, select the <span class="gui-object-action">Secondary Tables</span> information.</p>
<div class="figure"><a id="sthref173" name="sthref173"></a>
<p class="titleinfigure">Specifying Secondary Tables</p>
<img src="img/secondary_tables.png" alt="Secondary Tables area on the JPA Details view." title="Secondary Tables area on the JPA Details view." /><br /></div>
<!-- class="figure" --></li>
<li>
<p>Click <span class="bold">Add</span> to associate an additional table with the entity. The Edit Secondary Table dialog appears</p>
</li>
<li>
<p>Select the <span class="bold">Name</span>, <span class="bold">Catalog</span>, and <span class="bold">Schema</span> of the additional table to associate with the entity.</p>
</li>
</ol>
<p>Eclipse adds the following annotations the entity:</p>
<pre xml:space="preserve" class="oac_no_warn">
@SecondaryTable(name="NAME", catalog = "CATALOG", schema = "SCHEMA")
</pre>
<p>To override the default primary key:</p>
<ol>
<li>
<p>Enable the <span class="bold">Overwrite default</span> option, then click <span class="bold">Add</span> to specify a new primary key join column. The Create New Primary Key Join Column appears.</p>
</li>
<li>
<p>Select the <span class="bold">Name</span>, <span class="bold">Referenced column name</span>, <span class="bold">Table</span>, and <span class="bold">Column definition</span> of the primary key for the entity.</p>
<p>Eclipse adds the following annotations the entity:</p>
<pre xml:space="preserve" class="oac_no_warn">
@SecondaryTable(name="NAME", catalog = "CATALOG", schema = "SCHEMA", pkJoinColumns = {@PrimaryKeyJoinColumn(name="id", referencedColumnName = "id"),@PrimaryKeyJoinColumn(name="NAME", referencedColumnName = "REFERENCED COLUMN NAME", columnDefinition = "COLUMN DEFINITION")})
</pre></li>
</ol>
<a id="sthref174" name="sthref174"></a>
<p class="subhead2">Related reference</p>
<ul>
<li>
<p><a href="task_add_persistence.htm#BABHICAI">Adding persistence to a class</a></p>
</li>
</ul>
<a id="sthref175" name="sthref175"></a>
<p class="subhead2">Related concepts</p>
<ul>
<li>
<p><a href="concept_persistence.htm#BABCAHIC">Understanding Java persistence</a></p>
</li>
</ul>
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