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 <div class="subTitle">org.apache.calcite.plan</div>
 <h2 title="类 RelOptRuleOperand" class="title">类 RelOptRuleOperand</h2>
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 <ul class="inheritance">
 <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">java.lang.Object</a></li>
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 <li>org.apache.calcite.plan.RelOptRuleOperand</li>
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 <pre>public class <span class="typeNameLabel">RelOptRuleOperand</span>
 extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></pre>
 <div class="block">Operand that determines whether a <a href="../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类"><code>RelOptRule</code></a>
  can be applied to a particular expression.

  <p>For example, the rule to pull a filter up from the left side of a join
  takes operands: <code>Join(Filter, Any)</code>.</p>

  <p>Note that <code>children</code> means different things if it is empty or
  it is <code>null</code>: <code>Join(Filter <b>()</b>, Any)</code> means
  that, to match the rule, <code>Filter</code> must have no operands.</p></div>
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 </ul>
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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><a href="../../../../org/apache/calcite/plan/RelOptRuleOperandChildPolicy.html" title="org.apache.calcite.plan中的枚举">RelOptRuleOperandChildPolicy</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#childPolicy">childPolicy</a></span></code>
 <div class="block">Whether child operands can be matched in any order.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#ordinalInParent">ordinalInParent</a></span></code>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#ordinalInRule">ordinalInRule</a></span></code>&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>int[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#solveOrder">solveOrder</a></span></code>&nbsp;</td>
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 <caption><span>构造器</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">限定符</th>
 <th class="colLast" scope="col">构造器和说明</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected </code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#RelOptRuleOperand-java.lang.Class-org.apache.calcite.plan.RelTrait-java.util.function.Predicate-org.apache.calcite.plan.RelOptRuleOperandChildren-">RelOptRuleOperand</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>&lt;R&gt;&nbsp;clazz,
                  <a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a>&nbsp;trait,
                  <a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Predicate.html?is-external=true" title="java.util.function中的类或接口">Predicate</a>&lt;? super R&gt;&nbsp;predicate,
                  <a href="../../../../org/apache/calcite/plan/RelOptRuleOperandChildren.html" title="org.apache.calcite.plan中的类">RelOptRuleOperandChildren</a>&nbsp;children)</code>
 <div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;
 <div class="block"><span class="deprecationComment">Use
  <a href="../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelOptRuleOperandChildren-"><code>RelOptRule.operand(Class, RelOptRuleOperandChildren)</code></a> or one of its
  overloaded methods.</span></div>
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 <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="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>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#equals-java.lang.Object-">equals</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a>&nbsp;obj)</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="../../../../org/apache/calcite/plan/RelOptRuleOperand.html" title="org.apache.calcite.plan中的类">RelOptRuleOperand</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#getChildOperands--">getChildOperands</a></span>()</code>
 <div class="block">Returns the child operands.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>&lt;? extends <a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&gt;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#getMatchedClass--">getMatchedClass</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html" title="org.apache.calcite.plan中的类">RelOptRuleOperand</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#getParent--">getParent</a></span>()</code>
 <div class="block">Returns the parent operand.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类">RelOptRule</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#getRule--">getRule</a></span>()</code>
 <div class="block">Returns the rule this operand belongs to.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#hashCode--">hashCode</a></span>()</code>&nbsp;</td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#matches-org.apache.calcite.rel.RelNode-">matches</a></span>(<a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;rel)</code>
 <div class="block">Returns whether a relational expression matches this operand.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#setParent-org.apache.calcite.plan.RelOptRuleOperand-">setParent</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html" title="org.apache.calcite.plan中的类">RelOptRuleOperand</a>&nbsp;parent)</code>
 <div class="block">Sets the parent operand.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html#setRule-org.apache.calcite.plan.RelOptRule-">setRule</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类">RelOptRule</a>&nbsp;rule)</code>
 <div class="block">Sets the rule this operand belongs to</div>
 </td>
 </tr>
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 <h3>从类继承的方法&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></h3>
 <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#toString--" title="java.lang中的类或接口">toString</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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 <h3>字段详细资料</h3>
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 <h4>solveOrder</h4>
 <pre>public&nbsp;int[] solveOrder</pre>
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 <h4>ordinalInParent</h4>
 <pre>public&nbsp;int ordinalInParent</pre>
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 <h4>ordinalInRule</h4>
 <pre>public&nbsp;int ordinalInRule</pre>
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 <h4>childPolicy</h4>
 <pre>public final&nbsp;<a href="../../../../org/apache/calcite/plan/RelOptRuleOperandChildPolicy.html" title="org.apache.calcite.plan中的枚举">RelOptRuleOperandChildPolicy</a> childPolicy</pre>
 <div class="block">Whether child operands can be matched in any order.</div>
 </li>
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 <h3>构造器详细资料</h3>
 <a name="RelOptRuleOperand-java.lang.Class-org.apache.calcite.plan.RelTrait-java.util.function.Predicate-org.apache.calcite.plan.RelOptRuleOperandChildren-">
 <!--   -->
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 <h4>RelOptRuleOperand</h4>
 <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a>
 protected&nbsp;RelOptRuleOperand(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>&lt;R&gt;&nbsp;clazz,
                                         <a href="../../../../org/apache/calcite/plan/RelTrait.html" title="org.apache.calcite.plan中的接口">RelTrait</a>&nbsp;trait,
                                         <a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Predicate.html?is-external=true" title="java.util.function中的类或接口">Predicate</a>&lt;? super R&gt;&nbsp;predicate,
                                         <a href="../../../../org/apache/calcite/plan/RelOptRuleOperandChildren.html" title="org.apache.calcite.plan中的类">RelOptRuleOperandChildren</a>&nbsp;children)</pre>
 <div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;<span class="deprecationComment">Use
  <a href="../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelOptRuleOperandChildren-"><code>RelOptRule.operand(Class, RelOptRuleOperandChildren)</code></a> or one of its
  overloaded methods.</span></div>
 <div class="block">Creates an operand.

  <p>The <code>childOperands</code> argument is often populated by calling one
  of the following methods:
  <a href="../../../../org/apache/calcite/plan/RelOptRule.html#some-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-"><code>RelOptRule.some(org.apache.calcite.plan.RelOptRuleOperand, org.apache.calcite.plan.RelOptRuleOperand...)</code></a>,
  <a href="../../../../org/apache/calcite/plan/RelOptRule.html#none--"><code>RelOptRule.none()</code></a>,
  <a href="../../../../org/apache/calcite/plan/RelOptRule.html#any--"><code>RelOptRule.any()</code></a>,
  <a href="../../../../org/apache/calcite/plan/RelOptRule.html#unordered-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-"><code>RelOptRule.unordered(org.apache.calcite.plan.RelOptRuleOperand, org.apache.calcite.plan.RelOptRuleOperand...)</code></a>,
  See <a href="../../../../org/apache/calcite/plan/RelOptRuleOperandChildren.html" title="org.apache.calcite.plan中的类"><code>RelOptRuleOperandChildren</code></a> for more
  details.</div>
 <dl>
 <dt><span class="paramLabel">参数:</span></dt>
 <dd><code>clazz</code> - Class of relational expression to match (must not be null)</dd>
 <dd><code>trait</code> - Trait to match, or null to match any trait</dd>
 <dd><code>predicate</code> - Predicate to apply to relational expression</dd>
 <dd><code>children</code> - Child operands</dd>
 </dl>
 </li>
 </ul>
 </li>
 </ul>
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 <h3>方法详细资料</h3>
 <a name="getParent--">
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 <h4>getParent</h4>
 <pre>public&nbsp;<a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html" title="org.apache.calcite.plan中的类">RelOptRuleOperand</a>&nbsp;getParent()</pre>
 <div class="block">Returns the parent operand.</div>
 <dl>
 <dt><span class="returnLabel">返回:</span></dt>
 <dd>parent operand</dd>
 </dl>
 </li>
 </ul>
 <a name="setParent-org.apache.calcite.plan.RelOptRuleOperand-">
 <!--   -->
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 <h4>setParent</h4>
 <pre>public&nbsp;void&nbsp;setParent(<a href="../../../../org/apache/calcite/plan/RelOptRuleOperand.html" title="org.apache.calcite.plan中的类">RelOptRuleOperand</a>&nbsp;parent)</pre>
 <div class="block">Sets the parent operand.</div>
 <dl>
 <dt><span class="paramLabel">参数:</span></dt>
 <dd><code>parent</code> - Parent operand</dd>
 </dl>
 </li>
 </ul>
 <a name="getRule--">
 <!--   -->
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 <h4>getRule</h4>
 <pre>public&nbsp;<a href="../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类">RelOptRule</a>&nbsp;getRule()</pre>
 <div class="block">Returns the rule this operand belongs to.</div>
 <dl>
 <dt><span class="returnLabel">返回:</span></dt>
 <dd>containing rule</dd>
 </dl>
 </li>
 </ul>
 <a name="setRule-org.apache.calcite.plan.RelOptRule-">
 <!--   -->
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 <h4>setRule</h4>
 <pre>public&nbsp;void&nbsp;setRule(<a href="../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类">RelOptRule</a>&nbsp;rule)</pre>
 <div class="block">Sets the rule this operand belongs to</div>
 <dl>
 <dt><span class="paramLabel">参数:</span></dt>
 <dd><code>rule</code> - containing rule</dd>
 </dl>
 </li>
 </ul>
 <a name="hashCode--">
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 <h4>hashCode</h4>
 <pre>public&nbsp;int&nbsp;hashCode()</pre>
 <dl>
 <dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a></code>&nbsp;在类中&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></code></dd>
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 <pre>public&nbsp;boolean&nbsp;equals(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a>&nbsp;obj)</pre>
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 <dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a></code>&nbsp;在类中&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></code></dd>
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 <pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>&lt;? extends <a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&gt;&nbsp;getMatchedClass()</pre>
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 <dd>relational expression class matched by this operand</dd>
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 <pre>public&nbsp;<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="../../../../org/apache/calcite/plan/RelOptRuleOperand.html" title="org.apache.calcite.plan中的类">RelOptRuleOperand</a>&gt;&nbsp;getChildOperands()</pre>
 <div class="block">Returns the child operands.</div>
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 <dd>child operands</dd>
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 <pre>public&nbsp;boolean&nbsp;matches(<a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;rel)</pre>
 <div class="block">Returns whether a relational expression matches this operand. It must be
  of the right class and trait.</div>
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