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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.piglet</a></div>
<h2 title="Class PigRelExWalker" class="title">Class PigRelExWalker</h2>
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<li>java.lang.Object</li>
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<li>org.apache.pig.newplan.PlanWalker</li>
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<li>org.apache.calcite.piglet.PigRelExWalker</li>
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<pre>class <span class="typeNameLabel">PigRelExWalker</span>
extends org.apache.pig.newplan.PlanWalker</pre>
<div class="block">Post-order walker for Pig expression plans. Walk the plan from
source to sinks.</div>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.pig.newplan.OperatorPlan)">PigRelExWalker</a></span>&#8203;(org.apache.pig.newplan.OperatorPlan&nbsp;plan)</code></th>
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<td class="colFirst"><code>private void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#postOrderWalk(org.apache.pig.newplan.Operator,org.apache.pig.newplan.PlanVisitor)">postOrderWalk</a></span>&#8203;(org.apache.pig.newplan.Operator&nbsp;root,
org.apache.pig.newplan.PlanVisitor&nbsp;visitor)</code></th>
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<div class="block">Does post-order walk on the Pig expression plan from source to sinks.</div>
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<td class="colFirst"><code>org.apache.pig.newplan.PlanWalker</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#spawnChildWalker(org.apache.pig.newplan.OperatorPlan)">spawnChildWalker</a></span>&#8203;(org.apache.pig.newplan.OperatorPlan&nbsp;operatorPlan)</code></th>
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<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#walk(org.apache.pig.newplan.PlanVisitor)">walk</a></span>&#8203;(org.apache.pig.newplan.PlanVisitor&nbsp;planVisitor)</code></th>
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<code>getPlan, setPlan</code></li>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>PigRelExWalker</h4>
<pre>PigRelExWalker&#8203;(org.apache.pig.newplan.OperatorPlan&nbsp;plan)</pre>
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<h4>walk</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;walk&#8203;(org.apache.pig.newplan.PlanVisitor&nbsp;planVisitor)
throws org.apache.pig.impl.logicalLayer.FrontendException</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>walk</code>&nbsp;in class&nbsp;<code>org.apache.pig.newplan.PlanWalker</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>org.apache.pig.impl.logicalLayer.FrontendException</code></dd>
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<h4>postOrderWalk</h4>
<pre class="methodSignature">private&nbsp;void&nbsp;postOrderWalk&#8203;(org.apache.pig.newplan.Operator&nbsp;root,
org.apache.pig.newplan.PlanVisitor&nbsp;visitor)
throws org.apache.pig.impl.logicalLayer.FrontendException</pre>
<div class="block">Does post-order walk on the Pig expression plan from source to sinks.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>root</code> - The root expression operator</dd>
<dd><code>visitor</code> - The visitor of each Pig expression node.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>org.apache.pig.impl.logicalLayer.FrontendException</code> - Exception during processing Pig operator</dd>
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<h4>spawnChildWalker</h4>
<pre class="methodSignature">public&nbsp;org.apache.pig.newplan.PlanWalker&nbsp;spawnChildWalker&#8203;(org.apache.pig.newplan.OperatorPlan&nbsp;operatorPlan)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>spawnChildWalker</code>&nbsp;in class&nbsp;<code>org.apache.pig.newplan.PlanWalker</code></dd>
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