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| <title>Primary Key Generation</title> |
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| <meta name="date" content="2013-04-05T12:21:40Z" /> |
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| <meta name="doctitle" content="Primary Key Generation" /> |
| <meta name="relnum" content="Release 3.3" /> |
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| <div class="sect3"><!-- infolevel="all" infotype="General" --> |
| <h1><a id="sthref502" name="sthref502"></a><a id="sthref503" name="sthref503"></a>Primary Key Generation</h1> |
| <p>Use the Primary Key Generation area in the <span class="gui-object-title">JPA Details</span> view to specify how to generate a primary key for a given entity.</p> |
| <div class="inftblhruleinformalwide"> |
| <table class="HRuleInformalWide" title="JPA Details view, Primary key page" summary="JPA Details view, Primary key page" dir="ltr" border="1" width="100%" frame="hsides" rules="rows" cellpadding="3" cellspacing="0"> |
| <col width="16%" /> |
| <col width="*" /> |
| <col width="17%" /> |
| <col width="25%" /> |
| <thead> |
| <tr align="left" valign="top"> |
| <th align="left" valign="bottom" id="r1c1-t31">Property</th> |
| <th align="left" valign="bottom" id="r1c2-t31">Description</th> |
| <th align="left" valign="bottom" id="r1c3-t31">Default</th> |
| <th align="left" valign="bottom" id="r1c4-t31">Available for Entity Type</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr align="left" valign="top"> |
| <td align="left" id="r2c1-t31" headers="r1c1-t31"> |
| <p><span class="bold">Table Generator</span></p> |
| </td> |
| <td align="left" headers="r2c1-t31 r1c2-t31"> |
| <p>These fields define the database table used for generating the primary key and correspond to the <code>@TableGenerator</code> annotation.</p> |
| </td> |
| <td align="left" headers="r2c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r2c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r3c1-t31" headers="r1c1-t31"> |
| <p>Name</p> |
| </td> |
| <td align="left" headers="r3c1-t31 r1c2-t31"> |
| <p>Unique name of the generator.</p> |
| </td> |
| <td align="left" headers="r3c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r3c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r4c1-t31" headers="r1c1-t31"> |
| <p>Table</p> |
| </td> |
| <td align="left" headers="r4c1-t31 r1c2-t31"> |
| <p>Database table that stores the generated ID values.</p> |
| </td> |
| <td align="left" headers="r4c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r4c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r5c1-t31" headers="r1c1-t31"> |
| <p>Schema</p> |
| </td> |
| <td align="left" headers="r5c1-t31 r1c2-t31"> |
| <p>Database schema of the <span class="bold">Table</span>.</p> |
| </td> |
| <td align="left" headers="r5c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r5c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r6c1-t31" headers="r1c1-t31"> |
| <p>Catalog</p> |
| </td> |
| <td align="left" headers="r6c1-t31 r1c2-t31"> |
| <p>Database catalog of the <span class="bold">Table</span>.</p> |
| </td> |
| <td align="left" headers="r6c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r6c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r7c1-t31" headers="r1c1-t31"> |
| <p>Primary key column</p> |
| </td> |
| <td align="left" headers="r7c1-t31 r1c2-t31"> |
| <p>The column in the table generator's <span class="bold">Table</span> that contains the primary key.</p> |
| </td> |
| <td align="left" headers="r7c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r7c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r8c1-t31" headers="r1c1-t31"> |
| <p>Value column</p> |
| </td> |
| <td align="left" headers="r8c1-t31 r1c2-t31"> |
| <p>The column that stores the generated ID values.</p> |
| </td> |
| <td align="left" headers="r8c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r8c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r9c1-t31" headers="r1c1-t31"> |
| <p>Allocation size</p> |
| </td> |
| <td align="left" headers="r9c1-t31 r1c2-t31"> |
| <p>The value for the <span class="bold">Primary Key Column</span> in the generator table.</p> |
| </td> |
| <td align="left" headers="r9c1-t31 r1c3-t31"> |
| <p>50</p> |
| </td> |
| <td align="left" headers="r9c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r10c1-t31" headers="r1c1-t31"> |
| <p>Initial value</p> |
| </td> |
| <td align="left" headers="r10c1-t31 r1c2-t31"> |
| <p>The starting value of the generated primary key.</p> |
| </td> |
| <td align="left" headers="r10c1-t31 r1c3-t31"> |
| <p>0</p> |
| </td> |
| <td align="left" headers="r10c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r11c1-t31" headers="r1c1-t31"> |
| <p><span class="bold">Sequence Generator</span></p> |
| </td> |
| <td align="left" headers="r11c1-t31 r1c2-t31"> |
| <p><a id="sthref504" name="sthref504"></a><a id="sthref505" name="sthref505"></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="r11c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r11c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r12c1-t31" headers="r1c1-t31"> |
| <p>Name</p> |
| </td> |
| <td align="left" headers="r12c1-t31 r1c2-t31"> |
| <p>Name of the sequence table to use for defining primary key values.</p> |
| </td> |
| <td align="left" headers="r12c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r12c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r13c1-t31" headers="r1c1-t31"> |
| <p>Sequence</p> |
| </td> |
| <td align="left" headers="r13c1-t31 r1c2-t31"> |
| <p>Unique name of the sequence.</p> |
| </td> |
| <td align="left" headers="r13c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r13c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r14c1-t31" headers="r1c1-t31"> |
| <p>Schema</p> |
| </td> |
| <td align="left" headers="r14c1-t31 r1c2-t31"> |
| <p>Database schema of the <span class="bold">Sequence</span>.</p> |
| </td> |
| <td align="left" headers="r14c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r14c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r15c1-t31" headers="r1c1-t31"> |
| <p>Catalog</p> |
| </td> |
| <td align="left" headers="r15c1-t31 r1c2-t31"> |
| <p>Database catalog of the <span class="bold">Sequence</span>.</p> |
| </td> |
| <td align="left" headers="r15c1-t31 r1c3-t31"><br /></td> |
| <td align="left" headers="r15c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r16c1-t31" headers="r1c1-t31"> |
| <p>Allocation size</p> |
| </td> |
| <td align="left" headers="r16c1-t31 r1c2-t31"> |
| <p><a id="sthref506" name="sthref506"></a><a id="sthref507" name="sthref507"></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="r16c1-t31 r1c3-t31"> |
| <p>50</p> |
| </td> |
| <td align="left" headers="r16c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| <tr align="left" valign="top"> |
| <td align="left" id="r17c1-t31" headers="r1c1-t31"> |
| <p>Initial value</p> |
| </td> |
| <td align="left" headers="r17c1-t31 r1c2-t31"> |
| <p>The starting value of the generated primary key.</p> |
| </td> |
| <td align="left" headers="r17c1-t31 r1c3-t31"> |
| <p>1</p> |
| </td> |
| <td align="left" headers="r17c1-t31 r1c4-t31"> |
| <p><a href="tasks004.htm#BABGBIEE">Entity</a></p> |
| <br /></td> |
| </tr> |
| </tbody> |
| </table> |
| <br /></div> |
| <!-- class="inftblhruleinformalwide" --> |
| <a id="sthref508" name="sthref508"></a> |
| <p class="subhead2">Related reference</p> |
| <ul> |
| <li> |
| <p><a href="ref_persistence_prop_view.htm#BABFAEBB">JPA Details view (for entities)</a></p> |
| </li> |
| </ul> |
| </div> |
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