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 <h2 title="Annotation Type DiscriminatorColumn" class="title">Annotation Type DiscriminatorColumn</h2>
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 <pre>@Target(value=TYPE)
  @Retention(value=RUNTIME)
 public @interface <span class="memberNameLabel">DiscriminatorColumn</span></pre>
 <div class="block">Specifies the discriminator column for the
  <code>SINGLE_TABLE</code> and
  <code>JOINED</code> <a href="../../javax/persistence/Inheritance.html" title="annotation in javax.persistence"><code>Inheritance</code></a> mapping strategies.

  <p> The strategy and the discriminator column are only
  specified in the root of an entity class hierarchy or
  subhierarchy in which a different inheritance strategy is applied

  <p> If the <code>DiscriminatorColumn</code> annotation is missing,
  and a discriminator column is required, the name of the
  discriminator column defaults to <code>"DTYPE"</code> and the discriminator
  type to <a href="../../javax/persistence/DiscriminatorType.html#STRING"><code>DiscriminatorType.STRING</code></a>.

  <pre>
      Example:

      &#064;Entity
      &#064;Table(name="CUST")
      &#064;Inheritance(strategy=SINGLE_TABLE)
      &#064;DiscriminatorColumn(name="DISC", discriminatorType=STRING, length=20)
      public class Customer { ... }

      &#064;Entity
      public class ValuedCustomer extends Customer { ... }
  </pre></div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../javax/persistence/DiscriminatorValue.html" title="annotation in javax.persistence"><code>DiscriminatorValue</code></a></dd>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>1.0</dd>
 </dl>
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 <h3>Optional Element Summary</h3>
 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Optional Element Summary table, listing optional elements, and an explanation">
 <caption><span>Optional Elements</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Optional Element and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>java.lang.String</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/DiscriminatorColumn.html#columnDefinition--">columnDefinition</a></span></code>
 <div class="block">(Optional) The SQL fragment that is used when generating the DDL
  for the discriminator column.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code><a href="../../javax/persistence/DiscriminatorType.html" title="enum in javax.persistence">DiscriminatorType</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/DiscriminatorColumn.html#discriminatorType--">discriminatorType</a></span></code>
 <div class="block">(Optional) The type of object/column to use as a class discriminator.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/DiscriminatorColumn.html#length--">length</a></span></code>
 <div class="block">(Optional) The column length for String-based discriminator types.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>java.lang.String</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/DiscriminatorColumn.html#name--">name</a></span></code>
 <div class="block">(Optional) The name of column to be used for the discriminator.</div>
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 <pre>public abstract&nbsp;java.lang.String&nbsp;name</pre>
 <div class="block">(Optional) The name of column to be used for the discriminator.</div>
 <dl>
 <dt>Default:</dt>
 <dd>"DTYPE"</dd>
 </dl>
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 <pre>public abstract&nbsp;<a href="../../javax/persistence/DiscriminatorType.html" title="enum in javax.persistence">DiscriminatorType</a>&nbsp;discriminatorType</pre>
 <div class="block">(Optional) The type of object/column to use as a class discriminator.
  Defaults to <a href="../../javax/persistence/DiscriminatorType.html#STRING"><code>DiscriminatorType.STRING</code></a>.</div>
 <dl>
 <dt>Default:</dt>
 <dd>javax.persistence.DiscriminatorType.STRING</dd>
 </dl>
 </li>
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 <pre>public abstract&nbsp;java.lang.String&nbsp;columnDefinition</pre>
 <div class="block">(Optional) The SQL fragment that is used when generating the DDL
  for the discriminator column.
  <p> Defaults to the provider-generated SQL to create a column
  of the specified discriminator type.</div>
 <dl>
 <dt>Default:</dt>
 <dd>""</dd>
 </dl>
 </li>
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 </li>
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 <h4>length</h4>
 <pre>public abstract&nbsp;int&nbsp;length</pre>
 <div class="block">(Optional) The column length for String-based discriminator types.
  Ignored for other discriminator types.</div>
 <dl>
 <dt>Default:</dt>
 <dd>31</dd>
 </dl>
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	<h2 title="Annotation Type DiscriminatorColumn" class="title">Annotation Type DiscriminatorColumn</h2>
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	<pre>@Target(value=TYPE)
	@Retention(value=RUNTIME)
	public @interface <span class="memberNameLabel">DiscriminatorColumn</span></pre>
	<div class="block">Specifies the discriminator column for the
	<code>SINGLE_TABLE</code> and
	<code>JOINED</code> <a href="../../javax/persistence/Inheritance.html" title="annotation in javax.persistence"><code>Inheritance</code></a> mapping strategies.

	<p> The strategy and the discriminator column are only
	specified in the root of an entity class hierarchy or
	subhierarchy in which a different inheritance strategy is applied

	<p> If the <code>DiscriminatorColumn</code> annotation is missing,
	and a discriminator column is required, the name of the
	discriminator column defaults to <code>"DTYPE"</code> and the discriminator
	type to <a href="../../javax/persistence/DiscriminatorType.html#STRING"><code>DiscriminatorType.STRING</code></a>.

	<pre>
	Example:

	@Entity
	@Table(name="CUST")
	@Inheritance(strategy=SINGLE_TABLE)
	@DiscriminatorColumn(name="DISC", discriminatorType=STRING, length=20)
	public class Customer { ... }

	@Entity
	public class ValuedCustomer extends Customer { ... }
	</pre></div>
	<dl>
	<dt><span class="seeLabel">See Also:</span></dt>
	<dd><a href="../../javax/persistence/DiscriminatorValue.html" title="annotation in javax.persistence"><code>DiscriminatorValue</code></a></dd>
	<dt><span class="simpleTagLabel">Since:</span></dt>
	<dd>1.0</dd>
	</dl>
	</li>
	</ul>
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	<h3>Optional Element Summary</h3>
	<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Optional Element Summary table, listing optional elements, and an explanation">
	<caption><span>Optional Elements</span><span class="tabEnd"> </span></caption>
	<tr>
	<th class="colFirst" scope="col">Modifier and Type</th>
	<th class="colLast" scope="col">Optional Element and Description</th>
	</tr>
	<tr class="altColor">
	<td class="colFirst"><code>java.lang.String</code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/DiscriminatorColumn.html#columnDefinition--">columnDefinition</a></span></code>
	<div class="block">(Optional) The SQL fragment that is used when generating the DDL
	for the discriminator column.</div>
	</td>
	</tr>
	<tr class="rowColor">
	<td class="colFirst"><code><a href="../../javax/persistence/DiscriminatorType.html" title="enum in javax.persistence">DiscriminatorType</a></code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/DiscriminatorColumn.html#discriminatorType--">discriminatorType</a></span></code>
	<div class="block">(Optional) The type of object/column to use as a class discriminator.</div>
	</td>
	</tr>
	<tr class="altColor">
	<td class="colFirst"><code>int</code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/DiscriminatorColumn.html#length--">length</a></span></code>
	<div class="block">(Optional) The column length for String-based discriminator types.</div>
	</td>
	</tr>
	<tr class="rowColor">
	<td class="colFirst"><code>java.lang.String</code></td>
	<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/persistence/DiscriminatorColumn.html#name--">name</a></span></code>
	<div class="block">(Optional) The name of column to be used for the discriminator.</div>
	</td>
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	<h4>name</h4>
	<pre>public abstract java.lang.String name</pre>
	<div class="block">(Optional) The name of column to be used for the discriminator.</div>
	<dl>
	<dt>Default:</dt>
	<dd>"DTYPE"</dd>
	</dl>
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	<h4>discriminatorType</h4>
	<pre>public abstract <a href="../../javax/persistence/DiscriminatorType.html" title="enum in javax.persistence">DiscriminatorType</a> discriminatorType</pre>
	<div class="block">(Optional) The type of object/column to use as a class discriminator.
	Defaults to <a href="../../javax/persistence/DiscriminatorType.html#STRING"><code>DiscriminatorType.STRING</code></a>.</div>
	<dl>
	<dt>Default:</dt>
	<dd>javax.persistence.DiscriminatorType.STRING</dd>
	</dl>
	</li>
	</ul>
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	<h4>columnDefinition</h4>
	<pre>public abstract java.lang.String columnDefinition</pre>
	<div class="block">(Optional) The SQL fragment that is used when generating the DDL
	for the discriminator column.
	<p> Defaults to the provider-generated SQL to create a column
	of the specified discriminator type.</div>
	<dl>
	<dt>Default:</dt>
	<dd>""</dd>
	</dl>
	</li>
	</ul>
	</li>
	</ul>
	<ul class="blockList">
	<li class="blockList"><a name="length--">
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	</a>
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	<h4>length</h4>
	<pre>public abstract int length</pre>
	<div class="block">(Optional) The column length for String-based discriminator types.
	Ignored for other discriminator types.</div>
	<dl>
	<dt>Default:</dt>
	<dd>31</dd>
	</dl>
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	<li>Field \| </li>
	<li><a href="#annotation.type.element.detail">Element</a></li>
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