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<title>General information</title>
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<p><a id="CACBHFIJ" name="CACBHFIJ"></a></p>
<div class="sect3"><!-- infolevel="all" infotype="General" -->
<table class="simple oac_no_warn" summary="" cellspacing="0" cellpadding="0" width="100%">
<tr valign="bottom">
<td align="left" width="86%">
<h1>General information</h1>
</td>
</tr>
</table>
<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-t6">Property</th>
<th align="left" valign="bottom" id="r1c2-t6">Description</th>
<th align="left" valign="bottom" id="r1c3-t6">Default</th>
<th align="left" valign="bottom" id="r1c4-t6">Available for Mapping Type</th>
</tr>
</thead>
<tbody>
<tr align="left" valign="top">
<td align="left" id="r2c1-t6" headers="r1c1-t6">Map As</td>
<td align="left" headers="r2c1-t6 r1c2-t6">Define the mapping type for the attribute</td>
<td align="left" headers="r2c1-t6 r1c3-t6">Basic</td>
<td align="left" headers="r2c1-t6 r1c4-t6">All mapping types</td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r3c1-t6" headers="r1c1-t6"><a id="CACGCBHB" name="CACGCBHB"></a>Column</td>
<td align="left" headers="r3c1-t6 r1c2-t6"><a id="sthref205" name="sthref205"></a><a id="sthref206" name="sthref206"></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-t6 r1c3-t6">By default, the Column is assumed to be named identically to the attribute.</td>
<td align="left" headers="r3c1-t6 r1c4-t6"><a href="tasks007.htm#BABBABCE">Basic mapping</a>, <a href="tasks008.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks010.htm#BABGCBHG">ID mapping</a>, <a href="tasks016.htm#BABHIBII">Version mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r4c1-t6" headers="r1c1-t6">&nbsp;&nbsp;Name</td>
<td align="left" headers="r4c1-t6 r1c2-t6">Name of the database column.
<p>This field corresponds to the <code>@Column</code> annotation.</p>
</td>
<td align="left" headers="r4c1-t6 r1c3-t6"><br /></td>
<td align="left" headers="r4c1-t6 r1c4-t6"><a href="tasks007.htm#BABBABCE">Basic mapping</a>, <a href="tasks008.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks010.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r5c1-t6" headers="r1c1-t6">&nbsp;&nbsp;Table</td>
<td align="left" headers="r5c1-t6 r1c2-t6">Name of the database table that contains the selected column.</td>
<td align="left" headers="r5c1-t6 r1c3-t6"><br /></td>
<td align="left" headers="r5c1-t6 r1c4-t6"><a href="tasks007.htm#BABBABCE">Basic mapping</a>, <a href="tasks008.htm#BABCBHDF">Embedded mapping</a>, <a href="tasks010.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r6c1-t6" headers="r1c1-t6"><a id="CACGGGHB" name="CACGGGHB"></a><a id="sthref207" name="sthref207"></a><a id="sthref208" name="sthref208"></a><a id="sthref209" name="sthref209"></a>Fetch Type</td>
<td align="left" headers="r6c1-t6 r1c2-t6">Defines how data is loaded from the database:
<ul>
<li type="disc">
<p>Eager &ndash; Data is loaded in before it is actually needed.</p>
</li>
<li type="disc">
<p>Lazy &ndash; Data is loaded only when required by the transaction.</p>
</li>
</ul>
</td>
<td align="left" headers="r6c1-t6 r1c3-t6">Eager</td>
<td align="left" headers="r6c1-t6 r1c4-t6"><a href="tasks007.htm#BABBABCE">Basic mapping</a>, <a href="tasks014.htm#BABFHBCJ">One-to-one mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r7c1-t6" headers="r1c1-t6">Optional</td>
<td align="left" headers="r7c1-t6 r1c2-t6">Specifies if this field is can be null.</td>
<td align="left" headers="r7c1-t6 r1c3-t6">Yes</td>
<td align="left" headers="r7c1-t6 r1c4-t6"><a href="tasks007.htm#BABBABCE">Basic mapping</a>, <a href="tasks014.htm#BABFHBCJ">One-to-one mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r8c1-t6" headers="r1c1-t6"><a id="CACBBIBI" name="CACBBIBI"></a><a id="sthref210" name="sthref210"></a>Lob</td>
<td align="left" headers="r8c1-t6 r1c2-t6">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="r8c1-t6 r1c3-t6"><br /></td>
<td align="left" headers="r8c1-t6 r1c4-t6"><a href="tasks007.htm#BABBABCE">Basic mapping</a><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r9c1-t6" headers="r1c1-t6"><a id="CACEAJGD" name="CACEAJGD"></a><a id="sthref211" name="sthref211"></a><a id="sthref212" name="sthref212"></a>Temporal</td>
<td align="left" headers="r9c1-t6 r1c2-t6">Specifies if this field is one of the following:
<ul>
<li type="disc">
<p>Date &ndash; <code>java.sql.Date</code></p>
</li>
<li type="disc">
<p>Time &ndash; <code>java.sql.Time</code></p>
</li>
<li type="disc">
<p>Timestamp &ndash; <code>java.sql.Timestamp</code></p>
</li>
</ul>
<p>This field corresponds to the <code>@Temporal</code> annotation.</p>
</td>
<td align="left" headers="r9c1-t6 r1c3-t6"><br /></td>
<td align="left" headers="r9c1-t6 r1c4-t6"><a href="tasks007.htm#BABBABCE">Basic mapping</a>, <a href="tasks010.htm#BABGCBHG">ID mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r10c1-t6" headers="r1c1-t6"><a id="sthref213" name="sthref213"></a><a id="sthref214" name="sthref214"></a>Enumerated</td>
<td align="left" headers="r10c1-t6 r1c2-t6">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 type="disc">
<p>ordinal</p>
</li>
<li type="disc">
<p><code>String</code></p>
</li>
</ul>
<p>This field corresponds to the <code>@Enumerated</code> annotation.</p>
</td>
<td align="left" headers="r10c1-t6 r1c3-t6">Ordinal</td>
<td align="left" headers="r10c1-t6 r1c4-t6"><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r11c1-t6" headers="r1c1-t6">Target Entity</td>
<td align="left" headers="r11c1-t6 r1c2-t6">The persistent entity to which the attribute is mapped.</td>
<td align="left" headers="r11c1-t6 r1c3-t6"><br /></td>
<td align="left" headers="r11c1-t6 r1c4-t6"><a href="tasks014.htm#BABFHBCJ">One-to-one mapping</a>,, <a href="tasks013.htm#BABHGEBD">One-to-many mapping</a> <a href="tasks011.htm#BABEIEGD">Many-to-many mapping</a>, <a href="tasks012.htm#BABHFAFJ">Many-to-one mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r12c1-t6" headers="r1c1-t6"><a id="CACJAIHB" name="CACJAIHB"></a>Cascade Type</td>
<td align="left" headers="r12c1-t6 r1c2-t6">Specify which operations are propagated throughout the entity.
<ul>
<li type="disc">
<p>All &ndash; All operations</p>
</li>
<li type="disc">
<p>Persist</p>
</li>
<li type="disc">
<p>Merge</p>
</li>
<li type="disc">
<p>Move</p>
</li>
</ul>
</td>
<td align="left" headers="r12c1-t6 r1c3-t6"><br /></td>
<td align="left" headers="r12c1-t6 r1c4-t6"><a href="tasks014.htm#BABFHBCJ">One-to-one mapping</a><br /></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r13c1-t6" headers="r1c1-t6"><a id="CACJDJJA" name="CACJDJJA"></a>Mapped By</td>
<td align="left" headers="r13c1-t6 r1c2-t6">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="r13c1-t6 r1c3-t6"><br /></td>
<td align="left" headers="r13c1-t6 r1c4-t6"><a href="tasks014.htm#BABFHBCJ">One-to-one mapping</a>, <a href="tasks013.htm#BABHGEBD">One-to-many mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r14c1-t6" headers="r1c1-t6"><a id="CACDADIH" name="CACDADIH"></a><a id="sthref215" name="sthref215"></a><a id="sthref216" name="sthref216"></a>Order By</td>
<td align="left" headers="r14c1-t6 r1c2-t6">Specify the default order for objects returned from a query:
<ul>
<li type="disc">
<p>No ordering</p>
</li>
<li type="disc">
<p>Primary key</p>
</li>
<li type="disc">
<p>Custom ordering</p>
</li>
</ul>
<p>This field corresponds to the <code>@OrderBy</code> annotation.</p>
</td>
<td align="left" headers="r14c1-t6 r1c3-t6">Primary key</td>
<td align="left" headers="r14c1-t6 r1c4-t6"><a href="tasks013.htm#BABHGEBD">One-to-many mapping</a>. <a href="tasks011.htm#BABEIEGD">Many-to-many mapping</a>, <a href="tasks012.htm#BABHFAFJ">Many-to-one mapping</a></td>
</tr>
<tr align="left" valign="top">
<td align="left" id="r15c1-t6" headers="r1c1-t6">Attribute Overrides</td>
<td align="left" headers="r15c1-t6 r1c2-t6">Overrides the column mappings from the mapped, entity tabled. (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="r15c1-t6 r1c3-t6"><br /></td>
<td align="left" headers="r15c1-t6 r1c4-t6"><a href="tasks008.htm#BABCBHDF">Embedded mapping</a>
<p><a href="tasks008.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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