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<div class="sect3"><!-- infolevel="all" infotype="General" -->
<h1>General information</h1>
<p>This table lists the General properties available in the <span class="gui-object-title">Java Details view</span> for each mapping type.</p>
<div class="inftblruleinformal">
<table class="RuleInformal" title="This table describes the options on the Persistence Properties view." summary="This table describes the options on the Persistence Properties view." dir="ltr" border="1" width="100%" frame="border" rules="all" cellpadding="3" cellspacing="0">
<thead>
<tr align="left" valign="top">
<th align="left" valign="bottom" id="r1c1-t10">Property</th>
<th align="left" valign="bottom" id="r1c2-t10">Description</th>
<th align="left" valign="bottom" id="r1c3-t10">Default</th>
<th align="left" valign="bottom" id="r1c4-t10">Available for Mapping Type</th>
</tr>
</thead>
<tbody>
<tr align="left" valign="top">
<td align="left" id="r2c1-t10" headers="r1c1-t10">Mapping Type Hyperlink</td>
<td align="left" headers="r2c1-t10 r1c2-t10">Clicking the name of the mapping type, which is represented as a hyperlink, invokes the Mapping Type Selection dialog. Use this dialog to specify the type of attribute.</td>
<td align="left" headers="r2c1-t10 r1c3-t10">Basic</td>
<td align="left" headers="r2c1-t10 r1c4-t10">All mapping types</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r3c1-t10" headers="r1c1-t10"><a id="CACGCBHB" name="CACGCBHB"></a>Column</td>
<td align="left" headers="r3c1-t10 r1c2-t10"><a id="sthref193" name="sthref193"></a><a id="sthref194" name="sthref194"></a>The database column that contains the value for the attribute. This field corresponds to the <code>@Column</code> annotation.</td>
<td align="left" headers="r3c1-t10 r1c3-t10">By default, the Column is assumed to be named identically to the attribute.</td>
<td align="left" headers="r3c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a>, <a href="tasks019.htm#BABHIBII">Version mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r4c1-t10" headers="r1c1-t10"> Name</td>
<td align="left" headers="r4c1-t10 r1c2-t10">Name of the database column.
<p>This field corresponds to the <code>@Column</code> annotation.</p>
</td>
<td align="left" headers="r4c1-t10 r1c3-t10"><br /></td>
<td align="left" headers="r4c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r5c1-t10" headers="r1c1-t10"> Table</td>
<td align="left" headers="r5c1-t10 r1c2-t10">Name of the database table that contains the selected column.</td>
<td align="left" headers="r5c1-t10 r1c3-t10"><br /></td>
<td align="left" headers="r5c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r6c1-t10" headers="r1c1-t10"> Insertable</td>
<td align="left" headers="r6c1-t10 r1c2-t10">Specifies if the column is always included in <code>SQL INSERT</code> statements.</td>
<td align="left" headers="r6c1-t10 r1c3-t10">True</td>
<td align="left" headers="r6c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r7c1-t10" headers="r1c1-t10"> Updatable</td>
<td align="left" headers="r7c1-t10 r1c2-t10">Specifies if this column is always included in <code>SQL UPDATE</code> statements.</td>
<td align="left" headers="r7c1-t10 r1c3-t10">True</td>
<td align="left" headers="r7c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r8c1-t10" headers="r1c1-t10"> Unique</td>
<td align="left" headers="r8c1-t10 r1c2-t10">Sets the <code>UNIQUE</code> constraint for the column.</td>
<td align="left" headers="r8c1-t10 r1c3-t10">False</td>
<td align="left" headers="r8c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r9c1-t10" headers="r1c1-t10"> Nullable</td>
<td align="left" headers="r9c1-t10 r1c2-t10">Specifies if the column allows null values.</td>
<td align="left" headers="r9c1-t10 r1c3-t10">True</td>
<td align="left" headers="r9c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r10c1-t10" headers="r1c1-t10"> Length</td>
<td align="left" headers="r10c1-t10 r1c2-t10">Sets the column length.</td>
<td align="left" headers="r10c1-t10 r1c3-t10">255</td>
<td align="left" headers="r10c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r11c1-t10" headers="r1c1-t10"> Precision</td>
<td align="left" headers="r11c1-t10 r1c2-t10">Sets the precision for the column values.</td>
<td align="left" headers="r11c1-t10 r1c3-t10">0</td>
<td align="left" headers="r11c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r12c1-t10" headers="r1c1-t10"> Scale</td>
<td align="left" headers="r12c1-t10 r1c2-t10">Sets the number of digits that appear to the right of the decimal point.</td>
<td align="left" headers="r12c1-t10 r1c3-t10">0</td>
<td align="left" headers="r12c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r13c1-t10" headers="r1c1-t10"> Column Definition</td>
<td align="left" headers="r13c1-t10 r1c2-t10">Define the DDL for a column. This is used when a table is being generated.</td>
<td align="left" headers="r13c1-t10 r1c3-t10"><br /></td>
<td align="left" headers="r13c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks011.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r14c1-t10" headers="r1c1-t10"><a id="CACGGGHB" name="CACGGGHB"></a><a id="sthref195" name="sthref195"></a><a id="sthref196" name="sthref196"></a><a id="sthref197" name="sthref197"></a>Fetch Type</td>
<td align="left" headers="r14c1-t10 r1c2-t10">Defines how data is loaded from the database:
<ul>
<li>
<p>Eager – Data is loaded in before it is actually needed.</p>
</li>
<li>
<p>Lazy – Data is loaded only when required by the transaction.</p>
</li>
</ul>
</td>
<td align="left" headers="r14c1-t10 r1c3-t10">Eager</td>
<td align="left" headers="r14c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks017.htm#BABFHBCJ">One-to-one mapping</a>, <a href="tasks014.htm#BABEIEGD">Many-to-many mapping</a>, <a href="tasks015.htm#BABHFAFJ">Many-to-one mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r15c1-t10" headers="r1c1-t10">Optional</td>
<td align="left" headers="r15c1-t10 r1c2-t10">Specifies if this field is can be null.</td>
<td align="left" headers="r15c1-t10 r1c3-t10">Yes</td>
<td align="left" headers="r15c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks017.htm#BABFHBCJ">One-to-one mapping</a>, <a href="tasks015.htm#BABHFAFJ">Many-to-one mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r16c1-t10" headers="r1c1-t10"><a id="CACBBIBI" name="CACBBIBI"></a><a id="sthref198" name="sthref198"></a>Lob</td>
<td align="left" headers="r16c1-t10 r1c2-t10">Specify if the field is mapped to <code>java.sql.Clob</code> or <code>java.sql.Blob</code>.
<p>This field corresponds to the <code>@Lob</code> annotation.</p>
</td>
<td align="left" headers="r16c1-t10 r1c3-t10"><br /></td>
<td align="left" headers="r16c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r17c1-t10" headers="r1c1-t10"><a id="CACEAJGD" name="CACEAJGD"></a><a id="sthref199" name="sthref199"></a><a id="sthref200" name="sthref200"></a><a id="sthref201" name="sthref201"></a>Temporal</td>
<td align="left" headers="r17c1-t10 r1c2-t10">Specifies if this field is one of the following:
<ul>
<li>
<p>Date – <code>java.sql.Date</code></p>
</li>
<li>
<p>Time – <code>java.sql.Time</code></p>
</li>
<li>
<p>Timestamp – <code>java.sql.Timestamp</code></p>
</li>
</ul>
<p>This field corresponds to the <code>@Temporal</code> annotation.</p>
</td>
<td align="left" headers="r17c1-t10 r1c3-t10"><br /></td>
<td align="left" headers="r17c1-t10 r1c4-t10"><a href="tasks010.htm#BABBABCE">Basic mapping</a>, <a href="tasks013.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r18c1-t10" headers="r1c1-t10"><a id="sthref202" name="sthref202"></a><a id="sthref203" name="sthref203"></a><a id="sthref204" name="sthref204"></a>Enumerated</td>
<td align="left" headers="r18c1-t10 r1c2-t10">Specify how to persist enumerated constraints if the <code>String</code> value suits your application requirements or to match an existing database schema.
<ul>
<li>
<p>ordinal</p>
</li>
<li>
<p><code>String</code></p>
</li>
</ul>
<p>This field corresponds to the <code>@Enumerated</code> annotation.</p>
</td>
<td align="left" headers="r18c1-t10 r1c3-t10">Ordinal</td>
<td align="left" headers="r18c1-t10 r1c4-t10"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r19c1-t10" headers="r1c1-t10">Target Entity</td>
<td align="left" headers="r19c1-t10 r1c2-t10">The persistent entity to which the attribute is mapped.</td>
<td align="left" headers="r19c1-t10 r1c3-t10"><br /></td>
<td align="left" headers="r19c1-t10 r1c4-t10"><a href="tasks017.htm#BABFHBCJ">One-to-one mapping</a>, <a href="tasks016.htm#BABHGEBD">One-to-many mapping</a> <a href="tasks014.htm#BABEIEGD">Many-to-many mapping</a>, <a href="tasks015.htm#BABHFAFJ">Many-to-one mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r20c1-t10" headers="r1c1-t10"><a id="CACJAIHB" name="CACJAIHB"></a>Cascade Type</td>
<td align="left" headers="r20c1-t10 r1c2-t10">Specify which operations are propagated throughout the entity.
<ul>
<li>
<p>All – All operations</p>
</li>
<li>
<p>Persist</p>
</li>
<li>
<p>Merge</p>
</li>
<li>
<p>Move</p>
</li>
<li>
<p>Remove</p>
</li>
<li>
<p>Refresh</p>
</li>
</ul>
</td>
<td align="left" headers="r20c1-t10 r1c3-t10"><br /></td>
<td align="left" headers="r20c1-t10 r1c4-t10"><a href="tasks017.htm#BABFHBCJ">One-to-one mapping</a>, <a href="tasks016.htm#BABHGEBD">One-to-many mapping</a>, <a href="tasks014.htm#BABEIEGD">Many-to-many mapping</a>, <a href="tasks015.htm#BABHFAFJ">Many-to-one mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r21c1-t10" headers="r1c1-t10"><a id="CACJDJJA" name="CACJDJJA"></a>Mapped By</td>
<td align="left" headers="r21c1-t10 r1c2-t10">The field in the database table that "owns" the relationship. This field is required only on the non-owning side of the relationship.</td>
<td align="left" headers="r21c1-t10 r1c3-t10"><br /></td>
<td align="left" headers="r21c1-t10 r1c4-t10"><a href="tasks017.htm#BABFHBCJ">One-to-one mapping</a>, <a href="tasks016.htm#BABHGEBD">One-to-many mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r22c1-t10" headers="r1c1-t10"><a id="CACDADIH" name="CACDADIH"></a><a id="sthref205" name="sthref205"></a><a id="sthref206" name="sthref206"></a>Order By</td>
<td align="left" headers="r22c1-t10 r1c2-t10">Specify the default order for objects returned from a query:
<ul>
<li>
<p>No ordering</p>
</li>
<li>
<p>Primary key</p>
</li>
<li>
<p>Custom ordering</p>
</li>
</ul>
<p>This field corresponds to the <code>@OrderBy</code> annotation.</p>
</td>
<td align="left" headers="r22c1-t10 r1c3-t10">Primary key</td>
<td align="left" headers="r22c1-t10 r1c4-t10"><a href="tasks016.htm#BABHGEBD">One-to-many mapping</a>. <a href="tasks014.htm#BABEIEGD">Many-to-many mapping</a>, <a href="tasks015.htm#BABHFAFJ">Many-to-one mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r23c1-t10" headers="r1c1-t10">Attribute Overrides</td>
<td align="left" headers="r23c1-t10 r1c2-t10">Overrides <span class="bold">Basic</span> mappings of a mapped superclass (for example, if the inherited column name is incompatible with a pre-existing data model, or invalid as a column name in your database).</td>
<td align="left" headers="r23c1-t10 r1c3-t10"><br /></td>
<td align="left" headers="r23c1-t10 r1c4-t10"><a href="tasks011.htm#BABCBHDF">Embedded mapping</a>
<p><a href="tasks011.htm#BABCBHDF">Embedded mapping</a></p>
<br /></td>
</tr>
</tbody>
</table>
<br /></div>
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<img src="img/ngrelt.png" alt="Related task" title="Related task" /><br />
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<a href="task_mapping.htm#BABDGBIJ">Mapping an entity</a></div>
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