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| <title>Version Mapping</title> |
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| <meta name="doctitle" content="Version Mapping" /> |
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| <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> |
| </div> |
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