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<div class="subTitle">org.apache.calcite.plan.volcano</div>
<h2 title="类 AbstractConverter.ExpandConversionRule" class="title">类 AbstractConverter.ExpandConversionRule</h2>
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<li><a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类">org.apache.calcite.plan.RelOptRule</a></li>
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<li>org.apache.calcite.plan.volcano.AbstractConverter.ExpandConversionRule</li>
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<dl>
<dt>封闭类:</dt>
<dd><a href="../../../../../org/apache/calcite/plan/volcano/AbstractConverter.html" title="org.apache.calcite.plan.volcano中的类">AbstractConverter</a></dd>
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<pre>public static class <span class="typeNameLabel">AbstractConverter.ExpandConversionRule</span>
extends <a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类">RelOptRule</a></pre>
<div class="block">Rule which converts an <a href="../../../../../org/apache/calcite/plan/volcano/AbstractConverter.html" title="org.apache.calcite.plan.volcano中的类"><code>AbstractConverter</code></a> into a chain of
converters from the source relation to the target traits.
<p>The chain produced is minimal: we have previously built the transitive
closure of the graph of conversions, so we choose the shortest chain.</p>
<p>Unlike the <a href="../../../../../org/apache/calcite/plan/volcano/AbstractConverter.html" title="org.apache.calcite.plan.volcano中的类"><code>AbstractConverter</code></a> they are replacing, these
converters are guaranteed to be able to convert any relation of their
calling convention. Furthermore, because they introduce subsets of other
calling conventions along the way, these subsets may spawn more efficient
conversions which are not generally applicable.</p>
<p>AbstractConverters can be messy, so they restrain themselves: they
don't fire if the target subset already has an implementation (with less
than infinite cost).</p></div>
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<h3>字段概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="字段概要表, 列表字段和解释">
<caption><span>字段</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">字段和说明</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/plan/volcano/AbstractConverter.ExpandConversionRule.html" title="org.apache.calcite.plan.volcano中的类">AbstractConverter.ExpandConversionRule</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/volcano/AbstractConverter.ExpandConversionRule.html#INSTANCE">INSTANCE</a></span></code>&nbsp;</td>
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<h3>从类继承的字段&nbsp;org.apache.calcite.plan.<a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类">RelOptRule</a></h3>
<code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#description">description</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operands">operands</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#relBuilderFactory">relBuilderFactory</a></code></li>
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<th class="colOne" scope="col">构造器和说明</th>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/volcano/AbstractConverter.ExpandConversionRule.html#ExpandConversionRule-org.apache.calcite.tools.RelBuilderFactory-">ExpandConversionRule</a></span>(<a href="../../../../../org/apache/calcite/tools/RelBuilderFactory.html" title="org.apache.calcite.tools中的接口">RelBuilderFactory</a>&nbsp;relBuilderFactory)</code>
<div class="block">Creates an ExpandConversionRule.</div>
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<h3>方法概要</h3>
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<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="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</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>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/volcano/AbstractConverter.ExpandConversionRule.html#onMatch-org.apache.calcite.plan.RelOptRuleCall-">onMatch</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="org.apache.calcite.plan中的类">RelOptRuleCall</a>&nbsp;call)</code>
<div class="block">Receives notification about a rule match.</div>
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<h3>从类继承的方法&nbsp;org.apache.calcite.plan.<a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类">RelOptRule</a></h3>
<code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#any--">any</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convert-org.apache.calcite.rel.RelNode-org.apache.calcite.plan.RelTrait-">convert</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convert-org.apache.calcite.rel.RelNode-org.apache.calcite.plan.RelTraitSet-">convert</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convertList-java.util.List-org.apache.calcite.plan.RelTrait-">convertList</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convertOperand-java.lang.Class-java.util.function.Predicate-org.apache.calcite.plan.RelTrait-">convertOperand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convertOperand-java.lang.Class-com.google.common.base.Predicate-org.apache.calcite.plan.RelTrait-">convertOperand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#equals-java.lang.Object-">equals</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#equals-org.apache.calcite.plan.RelOptRule-">equals</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOperand--">getOperand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOperands--">getOperands</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOutConvention--">getOutConvention</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOutTrait--">getOutTrait</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#hashCode--">hashCode</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#matches-org.apache.calcite.plan.RelOptRuleCall-">matches</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#none--">none</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelOptRuleOperandChildren-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelTrait-com.google.common.base.Predicate-org.apache.calcite.plan.RelOptRuleOperandChildren-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelTrait-com.google.common.base.Predicate-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelTrait-org.apache.calcite.plan.RelOptRuleOperandChildren-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operandJ-java.lang.Class-org.apache.calcite.plan.RelTrait-java.util.function.Predicate-org.apache.calcite.plan.RelOptRuleOperandChildren-">operandJ</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operandJ-java.lang.Class-org.apache.calcite.plan.RelTrait-java.util.function.Predicate-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">operandJ</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#some-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">some</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#toString--">toString</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#unordered-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">unordered</a></code></li>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li>
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<h4>INSTANCE</h4>
<pre>public static final&nbsp;<a href="../../../../../org/apache/calcite/plan/volcano/AbstractConverter.ExpandConversionRule.html" title="org.apache.calcite.plan.volcano中的类">AbstractConverter.ExpandConversionRule</a> INSTANCE</pre>
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<h4>ExpandConversionRule</h4>
<pre>public&nbsp;ExpandConversionRule(<a href="../../../../../org/apache/calcite/tools/RelBuilderFactory.html" title="org.apache.calcite.tools中的接口">RelBuilderFactory</a>&nbsp;relBuilderFactory)</pre>
<div class="block">Creates an ExpandConversionRule.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>relBuilderFactory</code> - Builder for relational expressions</dd>
</dl>
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<h4>onMatch</h4>
<pre>public&nbsp;void&nbsp;onMatch(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="org.apache.calcite.plan中的类">RelOptRuleCall</a>&nbsp;call)</pre>
<div class="block"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#onMatch-org.apache.calcite.plan.RelOptRuleCall-">RelOptRule</a></code></span></div>
<div class="block">Receives notification about a rule match. At the time that this method is
called, <a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html#rels"><code>call.rels</code></a> holds the set of relational
expressions which match the operands to the rule; <code>
call.rels[0]</code> is the root expression.
<p>Typically a rule would check that the nodes are valid matches, creates
a new expression, then calls back <a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html#transformTo-org.apache.calcite.rel.RelNode-java.util.Map-org.apache.calcite.plan.RelHintsPropagator-"><code>RelOptRuleCall.transformTo(org.apache.calcite.rel.RelNode, java.util.Map&lt;org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode&gt;, org.apache.calcite.plan.RelHintsPropagator)</code></a> to
register the expression.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#onMatch-org.apache.calcite.plan.RelOptRuleCall-">onMatch</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类">RelOptRule</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>call</code> - Rule call</dd>
<dt><span class="seeLabel">另请参阅:</span></dt>
<dd><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#matches-org.apache.calcite.plan.RelOptRuleCall-"><code>RelOptRule.matches(RelOptRuleCall)</code></a></dd>
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