Google Git
Sign in
apache / calcite-site / bf7470eb6bf1d52715d1d602e33af45602b82bc0 / . / apidocs / javadocAggregate / org / apache / calcite / rel / RelDistribution.html
blob: 11b2e834125f447dbea90f98deb3c01e2c81fed1 [file] [log] [blame]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<!-- NewPage -->
<html lang="zh">
<head>
<!-- Generated by javadoc -->
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>RelDistribution (Apache Calcite calcite API)</title>
<link rel="stylesheet" type="text/css" href="../../../../stylesheet.css" title="Style">
<script type="text/javascript" src="../../../../script.js"></script>
</head>
<body>
<script type="text/javascript"><!--
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="RelDistribution (Apache Calcite calcite API)";
}
}
catch(err) {
}
//-->
var methods = {"i0":6,"i1":6,"i2":6};
var tabs = {65535:["t0","所有方法"],2:["t2","实例方法"],4:["t3","抽象方法"]};
var altColor = "altColor";
var rowColor = "rowColor";
var tableTab = "tableTab";
var activeTableTab = "activeTableTab";
</script>
<noscript>
<div>您的浏览器已禁用 JavaScript。</div>
</noscript>
<!-- ========= START OF TOP NAVBAR ======= -->
<div class="topNav"><a name="navbar.top">
<!-- -->
</a>
<div class="skipNav"><a href="#skip.navbar.top" title="跳过导航链接">跳过导航链接</a></div>
<a name="navbar.top.firstrow">
<!-- -->
</a>
<ul class="navList" title="导航">
<li><a href="../../../../overview-summary.html">概览</a></li>
<li><a href="package-summary.html">程序包</a></li>
<li class="navBarCell1Rev">类</li>
<li><a href="package-tree.html">树</a></li>
<li><a href="../../../../deprecated-list.html">已过时</a></li>
<li><a href="../../../../index-all.html">索引</a></li>
<li><a href="../../../../help-doc.html">帮助</a></li>
</ul>
<div class="aboutLanguage"><b>Apache Calcite</b></div>
</div>
<div class="subNav">
<ul class="navList">
<li><a href="../../../../org/apache/calcite/rel/RelCollationTraitDef.html" title="org.apache.calcite.rel中的类"><span class="typeNameLink">上一个类</span></a></li>
<li><a href="../../../../org/apache/calcite/rel/RelDistribution.Type.html" title="org.apache.calcite.rel中的枚举"><span class="typeNameLink">下一个类</span></a></li>
</ul>
<ul class="navList">
<li><a href="../../../../index.html?org/apache/calcite/rel/RelDistribution.html" target="_top">框架</a></li>
<li><a href="RelDistribution.html" target="_top">无框架</a></li>
</ul>
<ul class="navList" id="allclasses_navbar_top">
<li><a href="../../../../allclasses-noframe.html">所有类</a></li>
</ul>
<div>
<script type="text/javascript"><!--
allClassesLink = document.getElementById("allclasses_navbar_top");
if(window==top) {
allClassesLink.style.display = "block";
}
else {
allClassesLink.style.display = "none";
}
//-->
</script>
</div>
<div>
<ul class="subNavList">
<li>概要:&nbsp;</li>
<li><a href="#nested.class.summary">嵌套</a>&nbsp;|&nbsp;</li>
<li>字段&nbsp;|&nbsp;</li>
<li>构造器&nbsp;|&nbsp;</li>
<li><a href="#method.summary">方法</a></li>
</ul>
<ul class="subNavList">
<li>详细资料:&nbsp;</li>
<li>字段&nbsp;|&nbsp;</li>
<li>构造器&nbsp;|&nbsp;</li>
<li><a href="#method.detail">方法</a></li>
</ul>
</div>
<a name="skip.navbar.top">
<!-- -->
</a></div>
<!-- ========= END OF TOP NAVBAR ========= -->
<!-- ======== START OF CLASS DATA ======== -->
<div class="header">
<div class="subTitle">org.apache.calcite.rel</div>
<h2 title="接口 RelDistribution" class="title">接口 RelDistribution</h2>
</div>
<div class="contentContainer">
<div class="description">
<ul class="blockList">
<li class="blockList">
<dl>
<dt>所有超级接口:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="java.lang中的类或接口">Comparable</a>&lt;<a href="../../../../org/apache/calcite/plan/RelMultipleTrait.html" title="org.apache.calcite.plan中的接口">RelMultipleTrait</a>&gt;, <a href="../../../../org/apache/calcite/plan/RelMultipleTrait.html" title="org.apache.calcite.plan中的接口">RelMultipleTrait</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a></dd>
</dl>
<hr>
<br>
<pre>public interface <span class="typeNameLabel">RelDistribution</span>
extends <a href="../../../../org/apache/calcite/plan/RelMultipleTrait.html" title="org.apache.calcite.plan中的接口">RelMultipleTrait</a></pre>
<div class="block">Description of the physical distribution of a relational expression.
<p>TBD:</p>
<ul>
<li>Can we shorten <a href="../../../../org/apache/calcite/rel/RelDistribution.Type.html#HASH_DISTRIBUTED"><code>RelDistribution.Type.HASH_DISTRIBUTED</code></a> to HASH, etc.</li>
<li>Do we need <a href="../../../../org/apache/calcite/rel/RelDistributions.html" title="org.apache.calcite.rel中的类"><code>RelDistributions</code></a>.DEFAULT?</li>
<li><a href="../../../../org/apache/calcite/rel/RelDistributionTraitDef.html#convert-org.apache.calcite.plan.RelOptPlanner-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.RelDistribution-boolean-"><code>RelDistributionTraitDef.convert(org.apache.calcite.plan.RelOptPlanner, org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelDistribution, boolean)</code></a>
does not create specific physical operators as it does in Drill. Drill
will need to create rules; or we could allow "converters" to be
registered with the planner that are not trait-defs.
</ul></div>
</li>
</ul>
</div>
<div class="summary">
<ul class="blockList">
<li class="blockList">
<!-- ======== NESTED CLASS SUMMARY ======== -->
<ul class="blockList">
<li class="blockList"><a name="nested.class.summary">
<!-- -->
</a>
<h3>嵌套类概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="嵌套类概要表, 列表嵌套类和解释">
<caption><span>嵌套类</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">限定符和类型</th>
<th class="colLast" scope="col">接口和说明</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/RelDistribution.Type.html" title="org.apache.calcite.rel中的枚举">RelDistribution.Type</a></span></code>
<div class="block">Type of distribution.</div>
</td>
</tr>
</table>
</li>
</ul>
<!-- ========== METHOD SUMMARY =========== -->
<ul class="blockList">
<li class="blockList"><a name="method.summary">
<!-- -->
</a>
<h3>方法概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释">
<caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">抽象方法</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">限定符和类型</th>
<th class="colLast" scope="col">方法和说明</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelDistribution.html" title="org.apache.calcite.rel中的接口">RelDistribution</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/RelDistribution.html#apply-org.apache.calcite.util.mapping.Mappings.TargetMapping-">apply</a></span>(<a href="../../../../org/apache/calcite/util/mapping/Mappings.TargetMapping.html" title="org.apache.calcite.util.mapping中的接口">Mappings.TargetMapping</a>&nbsp;mapping)</code>&nbsp;</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/RelDistribution.html#getKeys--">getKeys</a></span>()</code>
<div class="block">Returns the ordinals of the key columns.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/RelDistribution.Type.html" title="org.apache.calcite.rel中的枚举">RelDistribution.Type</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/rel/RelDistribution.html#getType--">getType</a></span>()</code>
<div class="block">Returns the type of distribution.</div>
</td>
</tr>
</table>
<ul class="blockList">
<li class="blockList"><a name="methods.inherited.from.class.org.apache.calcite.plan.RelMultipleTrait">
<!-- -->
</a>
<h3>从接口继承的方法&nbsp;org.apache.calcite.plan.<a href="../../../../org/apache/calcite/plan/RelMultipleTrait.html" title="org.apache.calcite.plan中的接口">RelMultipleTrait</a></h3>
<code><a href="../../../../org/apache/calcite/plan/RelMultipleTrait.html#isTop--">isTop</a></code></li>
</ul>
<ul class="blockList">
<li class="blockList"><a name="methods.inherited.from.class.org.apache.calcite.plan.RelTrait">
<!-- -->
</a>
<h3>从接口继承的方法&nbsp;org.apache.calcite.plan.<a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a></h3>
<code><a href="../../../../org/apache/calcite/plan/RelTrait.html#equals-java.lang.Object-">equals</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#getTraitDef--">getTraitDef</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#hashCode--">hashCode</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#register-org.apache.calcite.plan.RelOptPlanner-">register</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#satisfies-org.apache.calcite.plan.RelTrait-">satisfies</a>, <a href="../../../../org/apache/calcite/plan/RelTrait.html#toString--">toString</a></code></li>
</ul>
<ul class="blockList">
<li class="blockList"><a name="methods.inherited.from.class.java.lang.Comparable">
<!-- -->
</a>
<h3>从接口继承的方法&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="java.lang中的类或接口">Comparable</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true#compareTo-T-" title="java.lang中的类或接口">compareTo</a></code></li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
<div class="details">
<ul class="blockList">
<li class="blockList">
<!-- ============ METHOD DETAIL ========== -->
<ul class="blockList">
<li class="blockList"><a name="method.detail">
<!-- -->
</a>
<h3>方法详细资料</h3>
<a name="getType--">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>getType</h4>
<pre><a href="https://docs.oracle.com/javase/8/docs/api/javax/annotation/Nonnull.html?is-external=true" title="javax.annotation中的类或接口">@Nonnull</a>
<a href="../../../../org/apache/calcite/rel/RelDistribution.Type.html" title="org.apache.calcite.rel中的枚举">RelDistribution.Type</a>&nbsp;getType()</pre>
<div class="block">Returns the type of distribution.</div>
</li>
</ul>
<a name="getKeys--">
<!-- -->
</a>
<ul class="blockList">
<li class="blockList">
<h4>getKeys</h4>
<pre><a href="https://docs.oracle.com/javase/8/docs/api/javax/annotation/Nonnull.html?is-external=true" title="javax.annotation中的类或接口">@Nonnull</a>
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a>&gt;&nbsp;getKeys()</pre>
<div class="block">Returns the ordinals of the key columns.
<p>Order is important for some types (RANGE); other types (HASH) consider
it unimportant but impose an arbitrary order; other types (BROADCAST,
SINGLETON) never have keys.</div>
</li>
</ul>
<a name="apply-org.apache.calcite.util.mapping.Mappings.TargetMapping-">
<!-- -->
</a>
<ul class="blockListLast">
<li class="blockList">
<h4>apply</h4>
<pre><a href="../../../../org/apache/calcite/rel/RelDistribution.html" title="org.apache.calcite.rel中的接口">RelDistribution</a>&nbsp;apply(<a href="../../../../org/apache/calcite/util/mapping/Mappings.TargetMapping.html" title="org.apache.calcite.util.mapping中的接口">Mappings.TargetMapping</a>&nbsp;mapping)</pre>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
<!-- ========= END OF CLASS DATA ========= -->
<!-- ======= START OF BOTTOM NAVBAR ====== -->
<div class="bottomNav"><a name="navbar.bottom">
<!-- -->
</a>
<div class="skipNav"><a href="#skip.navbar.bottom" title="跳过导航链接">跳过导航链接</a></div>
<a name="navbar.bottom.firstrow">
<!-- -->
</a>
<ul class="navList" title="导航">
<li><a href="../../../../overview-summary.html">概览</a></li>
<li><a href="package-summary.html">程序包</a></li>
<li class="navBarCell1Rev">类</li>
<li><a href="package-tree.html">树</a></li>
<li><a href="../../../../deprecated-list.html">已过时</a></li>
<li><a href="../../../../index-all.html">索引</a></li>
<li><a href="../../../../help-doc.html">帮助</a></li>
</ul>
<div class="aboutLanguage"><b>Apache Calcite</b></div>
</div>
<div class="subNav">
<ul class="navList">
<li><a href="../../../../org/apache/calcite/rel/RelCollationTraitDef.html" title="org.apache.calcite.rel中的类"><span class="typeNameLink">上一个类</span></a></li>
<li><a href="../../../../org/apache/calcite/rel/RelDistribution.Type.html" title="org.apache.calcite.rel中的枚举"><span class="typeNameLink">下一个类</span></a></li>
</ul>
<ul class="navList">
<li><a href="../../../../index.html?org/apache/calcite/rel/RelDistribution.html" target="_top">框架</a></li>
<li><a href="RelDistribution.html" target="_top">无框架</a></li>
</ul>
<ul class="navList" id="allclasses_navbar_bottom">
<li><a href="../../../../allclasses-noframe.html">所有类</a></li>
</ul>
<div>
<script type="text/javascript"><!--
allClassesLink = document.getElementById("allclasses_navbar_bottom");
if(window==top) {
allClassesLink.style.display = "block";
}
else {
allClassesLink.style.display = "none";
}
//-->
</script>
</div>
<div>
<ul class="subNavList">
<li>概要:&nbsp;</li>
<li><a href="#nested.class.summary">嵌套</a>&nbsp;|&nbsp;</li>
<li>字段&nbsp;|&nbsp;</li>
<li>构造器&nbsp;|&nbsp;</li>
<li><a href="#method.summary">方法</a></li>
</ul>
<ul class="subNavList">
<li>详细资料:&nbsp;</li>
<li>字段&nbsp;|&nbsp;</li>
<li>构造器&nbsp;|&nbsp;</li>
<li><a href="#method.detail">方法</a></li>
</ul>
</div>
<a name="skip.navbar.bottom">
<!-- -->
</a></div>
<!-- ======== END OF BOTTOM NAVBAR ======= -->
<p class="legalCopy"><small>Copyright &copy; 2012-2020 Apache Software Foundation. All Rights Reserved.</small></p>
</body>
</html>