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<title>Primary Key Generation information</title>
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<meta name="doctitle" content="Primary Key Generation information" />
<meta name="relnum" content="Release 3.3" />
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<p class="betadraftsubtitle">Beta Draft: 2013-01-03</p>
<p><a id="CACFCCAB" name="CACFCCAB"></a></p>
<div class="sect3"><!-- infolevel="all" infotype="General" -->
<h1><a id="sthref592" name="sthref592"></a>Primary Key Generation information</h1>
<p>This table lists the fields available in the <span class="gui-object-title">Primary Key Generation</span> area in JPA Details view for <a href="tasks015.htm#BABGCBHG">ID mapping</a> types.</p>
<div class="inftblhruleinformal">
<table class="HRuleInformal" title="This table describes the options on the Join Columns tab." summary="This table describes the options on the Join Columns tab." dir="ltr" border="1" width="100%" frame="hsides" rules="rows" cellpadding="3" cellspacing="0">
<col width="26%" />
<col width="*" />
<col width="34%" />
<thead>
<tr align="left" valign="top">
<th align="left" valign="bottom" id="r1c1-t47">Property</th>
<th align="left" valign="bottom" id="r1c2-t47">Description</th>
<th align="left" valign="bottom" id="r1c3-t47">Default</th>
</tr>
</thead>
<tbody>
<tr align="left" valign="top">
<td align="left" id="r2c1-t47" headers="r1c1-t47"><a id="CACBAJBC" name="CACBAJBC"></a>
<p><span class="bold">Primary Key Generation</span></p>
</td>
<td align="left" headers="r2c1-t47 r1c2-t47">
<p><a id="sthref593" name="sthref593"></a><a id="sthref594" name="sthref594"></a>These fields define how the primary key is generated. These fields correspond to the <code>@GeneratedValue</code> annotation.</p>
</td>
<td align="left" headers="r2c1-t47 r1c3-t47">
<p>Generated Value</p>
</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r3c1-t47" headers="r1c1-t47"><a id="CACJEEEC" name="CACJEEEC"></a>
<p>Strategy</p>
</td>
<td align="left" headers="r3c1-t47 r1c2-t47">
<ul>
<li>
<p>Auto</p>
</li>
<li>
<p>Identity &ndash; Values are assigned by the database's <span class="bold">Identity</span> column.</p>
</li>
<li>
<p>Sequence &ndash; Values are assigned by a sequence table (see <a href="#CACFFHEH"><span class="bold">Sequence&nbsp;Generator</span></a>).</p>
</li>
<li>
<p>Table &ndash; Values are assigned by a database table (see <a href="#CACGFEAH"><span class="bold">Table Generator</span></a>).</p>
</li>
</ul>
</td>
<td align="left" headers="r3c1-t47 r1c3-t47">
<p>Auto</p>
</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r4c1-t47" headers="r1c1-t47"><a id="BABEEAHJ" name="BABEEAHJ"></a>
<p>Generator Name</p>
</td>
<td align="left" headers="r4c1-t47 r1c2-t47">
<p>Unique name of the generated value.</p>
</td>
<td align="left" headers="r4c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r5c1-t47" headers="r1c1-t47"><a id="CACGFEAH" name="CACGFEAH"></a>
<p><span class="bold">Table Generator</span></p>
</td>
<td align="left" headers="r5c1-t47 r1c2-t47">
<p>These fields define the database table used for generating the primary key and correspond to the <code>@TableGenerator</code> annotation.</p>
<p>These fields apply only when <span class="bold">Strategy</span>&nbsp;=&nbsp;<span class="bold">Table</span>.</p>
</td>
<td align="left" headers="r5c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r6c1-t47" headers="r1c1-t47">
<p>Name</p>
</td>
<td align="left" headers="r6c1-t47 r1c2-t47">
<p>Unique name of the generator.</p>
</td>
<td align="left" headers="r6c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r7c1-t47" headers="r1c1-t47">
<p>Table</p>
</td>
<td align="left" headers="r7c1-t47 r1c2-t47">
<p>Database table that stores the generated ID values.</p>
</td>
<td align="left" headers="r7c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r8c1-t47" headers="r1c1-t47">
<p>Schema</p>
</td>
<td align="left" headers="r8c1-t47 r1c2-t47">
<p>Schema of the table</p>
</td>
<td align="left" headers="r8c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r9c1-t47" headers="r1c1-t47">
<p>Catalog</p>
</td>
<td align="left" headers="r9c1-t47 r1c2-t47">
<p>Catalog of the table</p>
</td>
<td align="left" headers="r9c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r10c1-t47" headers="r1c1-t47">
<p>Primary Key Column</p>
</td>
<td align="left" headers="r10c1-t47 r1c2-t47">
<p>The column in the table generator's <span class="bold">Table</span> that contains the primary key.</p>
</td>
<td align="left" headers="r10c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r11c1-t47" headers="r1c1-t47">
<p>Value Column</p>
</td>
<td align="left" headers="r11c1-t47 r1c2-t47">
<p>The column that stores the generated ID values.</p>
</td>
<td align="left" headers="r11c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r12c1-t47" headers="r1c1-t47">
<p>Primary Key Column Value</p>
</td>
<td align="left" headers="r12c1-t47 r1c2-t47">
<p>The value for the <span class="bold">Primary Key Column</span> in the generator table.</p>
</td>
<td align="left" headers="r12c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r13c1-t47" headers="r1c1-t47">
<p>Allocation size</p>
</td>
<td align="left" headers="r13c1-t47 r1c2-t47"><br /></td>
<td align="left" headers="r13c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r14c1-t47" headers="r1c1-t47">
<p>Initial value</p>
</td>
<td align="left" headers="r14c1-t47 r1c2-t47"><br /></td>
<td align="left" headers="r14c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r15c1-t47" headers="r1c1-t47"><a id="CACFFHEH" name="CACFFHEH"></a>
<p><span class="bold">Sequence&nbsp;Generator</span></p>
</td>
<td align="left" headers="r15c1-t47 r1c2-t47">
<p><a id="sthref595" name="sthref595"></a><a id="sthref596" name="sthref596"></a>These fields define the specific sequence used for generating the primary key and correspond to the <code>@SequenceGenerator</code> annotation.</p>
<p>These fields apply only when <span class="bold">Strategy</span> = <span class="bold">Sequence</span>.</p>
</td>
<td align="left" headers="r15c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r16c1-t47" headers="r1c1-t47">
<p>Name</p>
</td>
<td align="left" headers="r16c1-t47 r1c2-t47">
<p>Name of the sequence table to use for defining primary key values.</p>
</td>
<td align="left" headers="r16c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r17c1-t47" headers="r1c1-t47">
<p>Sequence</p>
</td>
<td align="left" headers="r17c1-t47 r1c2-t47">
<p>Unique name of the sequence.</p>
</td>
<td align="left" headers="r17c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r18c1-t47" headers="r1c1-t47">
<p>Schema</p>
</td>
<td align="left" headers="r18c1-t47 r1c2-t47"><br /></td>
<td align="left" headers="r18c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r19c1-t47" headers="r1c1-t47">
<p>Catalog</p>
</td>
<td align="left" headers="r19c1-t47 r1c2-t47"><br /></td>
<td align="left" headers="r19c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r20c1-t47" headers="r1c1-t47">
<p>Allocation size</p>
</td>
<td align="left" headers="r20c1-t47 r1c2-t47"><br /></td>
<td align="left" headers="r20c1-t47 r1c3-t47"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r21c1-t47" headers="r1c1-t47">
<p>Initial value</p>
</td>
<td align="left" headers="r21c1-t47 r1c2-t47"><br /></td>
<td align="left" headers="r21c1-t47 r1c3-t47"><br /></td>
</tr>
</tbody>
</table>
<br /></div>
<!-- class="inftblhruleinformal" -->
<a id="sthref597" name="sthref597"></a>
<p class="subhead2">Related tasks</p>
<ul>
<li>
<p><a href="tasks015.htm#BABGCBHG">ID mapping</a></p>
</li>
</ul>
<a id="sthref598" name="sthref598"></a>
<p class="subhead2">Related reference</p>
<ul>
<li>
<p><a href="ref_persistence_map_view.htm#BABIFBAF">JPA Details view (for attributes)</a></p>
</li>
</ul>
</div>
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