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| <meta name="doctitle" content="Specifying additional tables" /> |
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| <div class="sect1"><!-- infolevel="all" infotype="General" --> |
| <h1>Specifying additional tables</h1> |
| <p>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="sthref91" name="sthref91"></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> |
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| <br /> |
| <p> </p> |
| <img src="img/ngrelt.png" alt="Related task" title="Related task" /><br /> |
| <br /> |
| <a href="task_add_persistence.htm#BABHICAI">Adding persistence to a class</a> |
| <p> </p> |
| <img src="img/ngrelc.png" alt="Related concept" title="Related concept" /><br /> |
| <br /> |
| <a href="concept_persistence.htm#BABCAHIC">Understanding Java persistence</a><br /></div> |
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