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| <div class="subTitle">org.apache.ignite.cache.query.annotations</div> |
| <h2 title="Annotation Type QuerySqlField.Group" class="title">Annotation Type QuerySqlField.Group</h2> |
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| <div class="description"> |
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| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Retention.html?is-external=true" title="class or interface in java.lang.annotation">@Retention</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Retention.html?is-external=true#value--" title="class or interface in java.lang.annotation">value</a>=<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/RetentionPolicy.html?is-external=true#RUNTIME" title="class or interface in java.lang.annotation">RUNTIME</a>) |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Target.html?is-external=true" title="class or interface in java.lang.annotation">@Target</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/Target.html?is-external=true#value--" title="class or interface in java.lang.annotation">value</a>={<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/ElementType.html?is-external=true#METHOD" title="class or interface in java.lang.annotation">METHOD</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/annotation/ElementType.html?is-external=true#FIELD" title="class or interface in java.lang.annotation">FIELD</a>}) |
| public static @interface <span class="memberNameLabel">QuerySqlField.Group</span></pre> |
| <div class="block">Describes group of index and position of field in this group. |
| <p> |
| Opposite to <a href="../../../../../../org/apache/ignite/cache/query/annotations/QuerySqlField.html#groups--"><code>QuerySqlField.groups()</code></a> this annotation gives control over order of fields in a group index. |
| This can be needed in scenarios when we have a query like |
| <code>select * from X where a = ? and b = ? order by b desc</code>. If we have index <code>(a asc, b asc)</code> |
| sorting on <code>b</code> will be performed. Here it is preferable to have index <code>(b desc, a asc)</code> |
| which will still allow query to search on index using both fields and avoid sorting because index |
| is already sorted in needed way.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../org/apache/ignite/cache/query/annotations/QuerySqlField.html#groups--"><code>QuerySqlField.groups()</code></a>, |
| <a href="../../../../../../org/apache/ignite/cache/query/annotations/QuerySqlField.html#orderedGroups--"><code>QuerySqlField.orderedGroups()</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
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| <div class="summary"> |
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| <!-- =========== ANNOTATION TYPE REQUIRED MEMBER SUMMARY =========== --> |
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| <!-- --> |
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| <h3>Required Element Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Required Element Summary table, listing required elements, and an explanation"> |
| <caption><span>Required Elements</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Required Element and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/cache/query/annotations/QuerySqlField.Group.html#name--">name</a></span></code> |
| <div class="block">Group index name where this field participate.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/cache/query/annotations/QuerySqlField.Group.html#order--">order</a></span></code> |
| <div class="block">Fields in this group index will be sorted on this attribute.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- =========== ANNOTATION TYPE OPTIONAL MEMBER SUMMARY =========== --> |
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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>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/ignite/cache/query/annotations/QuerySqlField.Group.html#descending--">descending</a></span></code> |
| <div class="block">Defines sorting order for this field in group.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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| <!-- ============ ANNOTATION TYPE MEMBER DETAIL =========== --> |
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| <h3>Element Detail</h3> |
| <a name="name--"> |
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| <h4>name</h4> |
| <pre>public abstract <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name</pre> |
| <div class="block">Group index name where this field participate.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Group index name</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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| <h4>order</h4> |
| <pre>public abstract int order</pre> |
| <div class="block">Fields in this group index will be sorted on this attribute.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Order number.</dd> |
| </dl> |
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| <h4>descending</h4> |
| <pre>public abstract boolean descending</pre> |
| <div class="block">Defines sorting order for this field in group.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>True if field will be in descending order.</dd> |
| </dl> |
| <dl> |
| <dt>Default:</dt> |
| <dd>false</dd> |
| </dl> |
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| <p class="legalCopy"><small><table width="100%" border="0" cellspacing=0 cellpadding=0 style="padding: 5px"> <tr> <td> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <a target=_blank href="https://ignite.apache.org"><nobr>2021 Copyright © Apache Software Foundation</nobr></a> </td> </tr> </tbody> </table> </td> <td width="100%" align="right" valign="center"> <a href="https://twitter.com/ApacheIgnite" class="twitter-follow-button" data-show-count="false" data-size="large">Follow @ApacheIgnite</a> </td> </tr> <tr> <td colspan="2" valign="top" align="left"> <table style="padding-left: 0; margin: 0"> <tbody style="padding: 0; margin: 0"> <tr style="padding: 0; margin: 0"> <td> <b>Ignite Database and Caching Platform</b> </td> <td>: ver. <strong>2.11.1</strong> </td> </tr> <tr style="padding: 0; margin: 0"> <td> <b>Release Date</b> </td> <td>: December 20 2021 </td> </tr> </tbody> </table> </td> </tr> </table></small></p> |
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