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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 PigRelExVisitor" class="title">Class PigRelExVisitor</h2>
 </div>
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 <ul class="inheritance">
 <li>java.lang.Object</li>
 <li>
 <ul class="inheritance">
 <li>org.apache.pig.newplan.PlanVisitor</li>
 <li>
 <ul class="inheritance">
 <li>org.apache.pig.newplan.logical.expression.LogicalExpressionVisitor</li>
 <li>
 <ul class="inheritance">
 <li>org.apache.calcite.piglet.PigRelExVisitor</li>
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 <pre>class <span class="typeNameLabel">PigRelExVisitor</span>
 extends org.apache.pig.newplan.logical.expression.LogicalExpressionVisitor</pre>
 <div class="block">Visits pig expression plans and converts them into corresponding RexNodes.</div>
 </li>
 </ul>
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 <caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colSecond" scope="col">Field</th>
 <th class="colLast" scope="col">Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private <a href="PigRelBuilder.html" title="class in org.apache.calcite.piglet">PigRelBuilder</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#builder">builder</a></span></code></th>
 <td class="colLast">
 <div class="block">The relational algebra builder customized for Pig.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#inputCount">inputCount</a></span></code></th>
 <td class="colLast">
 <div class="block">Number of inputs</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>private int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#inputOrdinal">inputOrdinal</a></span></code></th>
 <td class="colLast">
 <div class="block">Input ordinal</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>private java.util.Deque&lt;<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#stack">stack</a></span></code></th>
 <td class="colLast">
 <div class="block">Stack used during post order walking process when processing a Pig
  expression plan</div>
 </td>
 </tr>
 </table>
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 <h3>Fields inherited from class&nbsp;org.apache.pig.newplan.PlanVisitor</h3>
 <code>currentWalker, DEFAULT_SCOPE, plan</code></li>
 </ul>
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 <th class="colFirst" scope="col">Modifier</th>
 <th class="colSecond" scope="col">Constructor</th>
 <th class="colLast" scope="col">Description</th>
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 <tr class="altColor">
 <td class="colFirst"><code>private </code></td>
 <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.pig.newplan.OperatorPlan,org.apache.pig.newplan.PlanWalker,org.apache.calcite.piglet.PigRelBuilder,int,int)">PigRelExVisitor</a></span>&#8203;(org.apache.pig.newplan.OperatorPlan&nbsp;expressionPlan,
                org.apache.pig.newplan.PlanWalker&nbsp;walker,
                <a href="PigRelBuilder.html" title="class in org.apache.calcite.piglet">PigRelBuilder</a>&nbsp;builder,
                int&nbsp;inputCount,
                int&nbsp;inputOrdinal)</code></th>
 <td class="colLast">
 <div class="block">Creates a PigRelExVisitor.</div>
 </td>
 </tr>
 </table>
 </li>
 </ul>
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 <table class="memberSummary">
 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colSecond" scope="col">Method</th>
 <th class="colLast" scope="col">Description</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>private com.google.common.collect.ImmutableList&lt;<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#buildBinaryOperands()">buildBinaryOperands</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Builds operands for a binary operator.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>private com.google.common.collect.ImmutableList&lt;<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#buildOperands(int)">buildOperands</a></span>&#8203;(int&nbsp;numOps)</code></th>
 <td class="colLast">
 <div class="block">Builds operands for an operator from expressions on the top of the visitor stack.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>private int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#optSize(java.util.List)">optSize</a></span>&#8203;(java.util.List&lt;org.apache.pig.newplan.Operator&gt;&nbsp;list)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>private <a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#replacePatternIfPossible(org.apache.calcite.rex.RexNode)">replacePatternIfPossible</a></span>&#8203;(<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;rexNode)</code></th>
 <td class="colLast">
 <div class="block">Replaces Pig regular expressions with SQL regular expressions in a string.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>private java.util.List&lt;<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#translate()">translate</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Translates the given pig expression plan into a list of relational algebra
  expressions.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>(package private) static <a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#translatePigEx(org.apache.calcite.piglet.PigRelBuilder,org.apache.pig.newplan.logical.expression.LogicalExpressionPlan)">translatePigEx</a></span>&#8203;(<a href="PigRelBuilder.html" title="class in org.apache.calcite.piglet">PigRelBuilder</a>&nbsp;builder,
               org.apache.pig.newplan.logical.expression.LogicalExpressionPlan&nbsp;pigEx)</code></th>
 <td class="colLast">
 <div class="block">Translates a Pig expression plans into relational algebra expressions.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code>(package private) static <a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#translatePigEx(org.apache.calcite.piglet.PigRelBuilder,org.apache.pig.newplan.logical.expression.LogicalExpressionPlan,int,int)">translatePigEx</a></span>&#8203;(<a href="PigRelBuilder.html" title="class in org.apache.calcite.piglet">PigRelBuilder</a>&nbsp;builder,
               org.apache.pig.newplan.logical.expression.LogicalExpressionPlan&nbsp;pigEx,
               int&nbsp;inputCount,
               int&nbsp;inputOrdinal)</code></th>
 <td class="colLast">
 <div class="block">Translates a Pig expression plans into relational algebra expressions.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.AddExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.AddExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.AndExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.AndExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.BinCondExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.BinCondExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.CastExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.CastExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.ConstantExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.ConstantExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.DereferenceExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.DereferenceExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.DivideExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.DivideExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.EqualExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.EqualExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.GreaterThanEqualExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.GreaterThanEqualExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.GreaterThanExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.GreaterThanExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.IsNullExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.IsNullExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i18" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.LessThanEqualExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.LessThanEqualExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i19" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.LessThanExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.LessThanExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i20" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.MapLookupExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.MapLookupExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i21" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.ModExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.ModExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i22" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.MultiplyExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.MultiplyExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i23" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.NegativeExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.NegativeExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i24" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.NotEqualExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.NotEqualExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i25" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.NotExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.NotExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i26" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.OrExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.OrExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i27" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.ProjectExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.ProjectExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i28" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.RegexExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.RegexExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i29" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.ScalarExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.ScalarExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i30" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visit(org.apache.pig.newplan.logical.expression.SubtractExpression)">visit</a></span>&#8203;(org.apache.pig.newplan.logical.expression.SubtractExpression&nbsp;op)</code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr id="i31" class="rowColor">
 <td class="colFirst"><code>void</code></td>
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                         <a href="PigRelBuilder.html" title="class in org.apache.calcite.piglet">PigRelBuilder</a>&nbsp;builder,
                         int&nbsp;inputCount,
                         int&nbsp;inputOrdinal)
                  throws org.apache.pig.impl.logicalLayer.FrontendException</pre>
 <div class="block">Creates a PigRelExVisitor.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>expressionPlan</code> - Pig expression plan</dd>
 <dd><code>walker</code> - The walker over Pig expression plan.</dd>
 <dd><code>builder</code> - Relational algebra builder</dd>
 <dd><code>inputCount</code> - Number of inputs</dd>
 <dd><code>inputOrdinal</code> - Input ordinal</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code>org.apache.pig.impl.logicalLayer.FrontendException</code> - Exception during processing Pig operators</dd>
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                                    throws org.apache.pig.impl.logicalLayer.FrontendException</pre>
 <div class="block">Translates the given pig expression plan into a list of relational algebra
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 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Relational algebra expressions</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code>org.apache.pig.impl.logicalLayer.FrontendException</code> - Exception during processing Pig operators</dd>
 </dl>
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                               org.apache.pig.newplan.logical.expression.LogicalExpressionPlan&nbsp;pigEx,
                               int&nbsp;inputCount,
                               int&nbsp;inputOrdinal)
                        throws org.apache.pig.impl.logicalLayer.FrontendException</pre>
 <div class="block">Translates a Pig expression plans into relational algebra expressions.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>builder</code> - Relational algebra builder</dd>
 <dd><code>pigEx</code> - Pig expression plan</dd>
 <dd><code>inputCount</code> - Number of inputs</dd>
 <dd><code>inputOrdinal</code> - Input ordinal</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Relational algebra expressions</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code>org.apache.pig.impl.logicalLayer.FrontendException</code> - Exception during processing Pig operators</dd>
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                               org.apache.pig.newplan.logical.expression.LogicalExpressionPlan&nbsp;pigEx)
                        throws org.apache.pig.impl.logicalLayer.FrontendException</pre>
 <div class="block">Translates a Pig expression plans into relational algebra expressions.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>builder</code> - Relational algebra builder</dd>
 <dd><code>pigEx</code> - Pig expression plan</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Relational algebra expressions</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code>org.apache.pig.impl.logicalLayer.FrontendException</code> - Exception during processing Pig operators</dd>
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 <dl>
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 <dd><code>numOps</code> - number of operands</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
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 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code>visit</code>&nbsp;in class&nbsp;<code>org.apache.pig.newplan.logical.expression.LogicalExpressionVisitor</code></dd>
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 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code>visit</code>&nbsp;in class&nbsp;<code>org.apache.pig.newplan.logical.expression.LogicalExpressionVisitor</code></dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
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 <div class="block">Replaces Pig regular expressions with SQL regular expressions in a string.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>rexNode</code> - The string literal</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>New string literal with Pig regular expressions replaced by SQL regular expressions</dd>
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