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<title>Version Mapping</title>
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<meta name="date" content="2013-04-05T12:21:40Z" />
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<meta name="doctitle" content="Version Mapping" />
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<p><a id="CACHAEBB" name="CACHAEBB"></a></p>
<div class="sect3"><!-- infolevel="all" infotype="General" -->
<h1><a id="sthref567" name="sthref567"></a><a id="sthref568" name="sthref568"></a><a id="sthref569" name="sthref569"></a>Version Mapping</h1>
<div class="inftblhruleinformal">
<table class="HRuleInformal" summary="JPA Details view, Version page" dir="ltr" border="1" width="100%" frame="hsides" rules="rows" cellpadding="3" cellspacing="0">
<col width="29%" />
<col width="*" />
<col width="24%" />
<thead>
<tr align="left" valign="top">
<th align="left" valign="bottom" id="r1c1-t41">Property</th>
<th align="left" valign="bottom" id="r1c2-t41">Description</th>
<th align="left" valign="bottom" id="r1c3-t41">Default</th>
</tr>
</thead>
<tbody>
<tr align="left" valign="top">
<td align="left" id="r2c1-t41" headers="r1c1-t41">
<p><span class="bold">Column</span></p>
</td>
<td align="left" headers="r2c1-t41 r1c2-t41">
<p><a id="sthref570" name="sthref570"></a><a id="sthref571" name="sthref571"></a>The database column that contains the value for the attribute. This field corresponds to the <code>@Column</code> annotation.</p>
</td>
<td align="left" headers="r2c1-t41 r1c3-t41">
<p>By default, the Column is assumed to be named identically to the attribute.</p>
</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r3c1-t41" headers="r1c1-t41">
<p>Name</p>
</td>
<td align="left" headers="r3c1-t41 r1c2-t41">
<p>The database column mapped to the entity attribute.</p>
<p>By default, the Column is assumed to be named identically to the attribute and always included in the <code>INSERT</code> and <code>UPDATE</code> statements.</p>
</td>
<td align="left" headers="r3c1-t41 r1c3-t41"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r4c1-t41" headers="r1c1-t41">
<p>Table</p>
</td>
<td align="left" headers="r4c1-t41 r1c2-t41">
<p>Name of the database table that contains the selected column.</p>
</td>
<td align="left" headers="r4c1-t41 r1c3-t41"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r5c1-t41" headers="r1c1-t41">
<p><span class="bold">Details</span></p>
</td>
<td align="left" headers="r5c1-t41 r1c2-t41"><br /></td>
<td align="left" headers="r5c1-t41 r1c3-t41"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r6c1-t41" headers="r1c1-t41">
<p>Insertable</p>
</td>
<td align="left" headers="r6c1-t41 r1c2-t41">
<p>Specifies if the column is always included in <code>SQL INSERT</code> statements.</p>
</td>
<td align="left" headers="r6c1-t41 r1c3-t41">
<p>True</p>
</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r7c1-t41" headers="r1c1-t41">
<p>Updatable</p>
</td>
<td align="left" headers="r7c1-t41 r1c2-t41">
<p>Specifies if this column is always included in <code>SQL UPDATE</code> statements.</p>
</td>
<td align="left" headers="r7c1-t41 r1c3-t41">
<p>True</p>
</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r8c1-t41" headers="r1c1-t41">
<p>Unique</p>
</td>
<td align="left" headers="r8c1-t41 r1c2-t41">
<p>Sets the <code>UNIQUE</code> constraint for the column.</p>
</td>
<td align="left" headers="r8c1-t41 r1c3-t41">
<p>False</p>
</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r9c1-t41" headers="r1c1-t41">
<p>Nullable</p>
</td>
<td align="left" headers="r9c1-t41 r1c2-t41">
<p>Specifies if the column allows null values.</p>
</td>
<td align="left" headers="r9c1-t41 r1c3-t41">
<p>True</p>
</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r10c1-t41" headers="r1c1-t41">
<p>Length</p>
</td>
<td align="left" headers="r10c1-t41 r1c2-t41">
<p>Sets the column length.</p>
</td>
<td align="left" headers="r10c1-t41 r1c3-t41">
<p>255</p>
</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r11c1-t41" headers="r1c1-t41">
<p>Precision</p>
</td>
<td align="left" headers="r11c1-t41 r1c2-t41">
<p>Sets the precision for the column values.</p>
</td>
<td align="left" headers="r11c1-t41 r1c3-t41">
<p>0</p>
</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r12c1-t41" headers="r1c1-t41">
<p>Scale</p>
</td>
<td align="left" headers="r12c1-t41 r1c2-t41">
<p>Sets the number of digits that appear to the right of the decimal point.</p>
</td>
<td align="left" headers="r12c1-t41 r1c3-t41">
<p>0</p>
</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r13c1-t41" headers="r1c1-t41">
<p>Column definition</p>
</td>
<td align="left" headers="r13c1-t41 r1c2-t41">
<p>The SQL fragment that is used when generating the DDL for the column.</p>
</td>
<td align="left" headers="r13c1-t41 r1c3-t41"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r14c1-t41" headers="r1c1-t41">
<p><span class="bold">Mutable</span></p>
</td>
<td align="left" headers="r14c1-t41 r1c2-t41">
<p>Specify if the value of a complex field type can be changed (or not changed) instead of being replaced.</p>
</td>
<td align="left" headers="r14c1-t41 r1c3-t41">
<p>True</p>
</td>
</tr>
</tbody>
</table>
<br /></div>
<!-- class="inftblhruleinformal" -->
<p>Version mappings also include the following areas:</p>
<ul>
<li>
<p><a href="reference043.htm#CACIHAAF">Type information</a></p>
</li>
<li>
<p><a href="reference045.htm#CACJCHJB">Converters</a></p>
</li>
</ul>
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