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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.rex</a></div>
<h1 title="Interface RexVisitor" class="title">Interface RexVisitor&lt;R&gt;</h1>
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<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>R</code> - Return type</dd>
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<dl>
<dt>All Known Implementing Classes:</dt>
<dd><code><a href="../rel/rules/ProjectCorrelateTransposeRule.RexFieldAccessReplacer.html" title="class in org.apache.calcite.rel.rules">ProjectCorrelateTransposeRule.RexFieldAccessReplacer</a></code>, <code><a href="../rel/rules/ReduceDecimalsRule.DecimalShuttle.html" title="class in org.apache.calcite.rel.rules">ReduceDecimalsRule.DecimalShuttle</a></code>, <code><a href="../rel/rules/ReduceExpressionsRule.CaseShuttle.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.CaseShuttle</a></code>, <code><a href="../rel/rules/ReduceExpressionsRule.ReducibleExprLocator.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.ReducibleExprLocator</a></code>, <code><a href="../rel/rules/ReduceExpressionsRule.RexReplacer.html" title="class in org.apache.calcite.rel.rules">ReduceExpressionsRule.RexReplacer</a></code>, <code><a href="../plan/RelOptUtil.InputFinder.html" title="class in org.apache.calcite.plan">RelOptUtil.InputFinder</a></code>, <code><a href="../plan/RelOptUtil.InputReferencedVisitor.html" title="class in org.apache.calcite.plan">RelOptUtil.InputReferencedVisitor</a></code>, <code><a href="../plan/RelOptUtil.RexInputConverter.html" title="class in org.apache.calcite.plan">RelOptUtil.RexInputConverter</a></code>, <code><a href="../plan/RelOptUtil.VariableUsedVisitor.html" title="class in org.apache.calcite.plan">RelOptUtil.VariableUsedVisitor</a></code>, <code><a href="RexChecker.html" title="class in org.apache.calcite.rex">RexChecker</a></code>, <code><a href="RexInterpreter.html" title="class in org.apache.calcite.rex">RexInterpreter</a></code>, <code><a href="RexPermutationShuttle.html" title="class in org.apache.calcite.rex">RexPermutationShuttle</a></code>, <code><a href="RexPermuteInputsShuttle.html" title="class in org.apache.calcite.rex">RexPermuteInputsShuttle</a></code>, <code><a href="RexShuttle.html" title="class in org.apache.calcite.rex">RexShuttle</a></code>, <code><a href="../adapter/enumerable/RexToLixTranslator.html" title="class in org.apache.calcite.adapter.enumerable">RexToLixTranslator</a></code>, <code><a href="RexUtil.ExprSimplifier.html" title="class in org.apache.calcite.rex">RexUtil.ExprSimplifier</a></code>, <code><a href="RexUtil.FieldAccessFinder.html" title="class in org.apache.calcite.rex">RexUtil.FieldAccessFinder</a></code>, <code><a href="RexUtil.FixNullabilityShuttle.html" title="class in org.apache.calcite.rex">RexUtil.FixNullabilityShuttle</a></code>, <code><a href="RexUtil.RexFinder.html" title="class in org.apache.calcite.rex">RexUtil.RexFinder</a></code>, <code><a href="RexUtil.SubQueryFinder.html" title="class in org.apache.calcite.rex">RexUtil.SubQueryFinder</a></code>, <code><a href="RexVisitorImpl.html" title="class in org.apache.calcite.rex">RexVisitorImpl</a></code></dd>
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<hr>
<pre>public interface <span class="typeNameLabel">RexVisitor&lt;R&gt;</span></pre>
<div class="block">Visitor pattern for traversing a tree of <a href="RexNode.html" title="class in org.apache.calcite.rex"><code>RexNode</code></a> objects.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../util/Glossary.html#VISITOR_PATTERN"><code>Glossary.VISITOR_PATTERN</code></a>,
<a href="RexShuttle.html" title="class in org.apache.calcite.rex"><code>RexShuttle</code></a>,
<a href="RexVisitorImpl.html" title="class in org.apache.calcite.rex"><code>RexVisitorImpl</code></a></dd>
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<h2>Method Summary</h2>
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<div role="tablist" aria-orientation="horizontal"><button role="tab" aria-selected="true" aria-controls="memberSummary_tabpanel" tabindex="0" onkeydown="switchTab(event)" id="t0" class="activeTableTab">All Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t2" class="tableTab" onclick="show(2);">Instance Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t3" class="tableTab" onclick="show(4);">Abstract Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t5" class="tableTab" onclick="show(16);">Default Methods</button></div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
</tr>
</thead>
<tbody>
<tr class="altColor" id="i0">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitCall(org.apache.calcite.rex.RexCall)">visitCall</a></span>&#8203;(<a href="RexCall.html" title="class in org.apache.calcite.rex">RexCall</a>&nbsp;call)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor" id="i1">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitCorrelVariable(org.apache.calcite.rex.RexCorrelVariable)">visitCorrelVariable</a></span>&#8203;(<a href="RexCorrelVariable.html" title="class in org.apache.calcite.rex">RexCorrelVariable</a>&nbsp;correlVariable)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor" id="i2">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitDynamicParam(org.apache.calcite.rex.RexDynamicParam)">visitDynamicParam</a></span>&#8203;(<a href="RexDynamicParam.html" title="class in org.apache.calcite.rex">RexDynamicParam</a>&nbsp;dynamicParam)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor" id="i3">
<td class="colFirst"><code>default void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitEach(java.lang.Iterable)">visitEach</a></span>&#8203;(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;? extends <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;&nbsp;exprs)</code></th>
<td class="colLast">
<div class="block">Visits a list of expressions.</div>
</td>
</tr>
<tr class="altColor" id="i4">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitFieldAccess(org.apache.calcite.rex.RexFieldAccess)">visitFieldAccess</a></span>&#8203;(<a href="RexFieldAccess.html" title="class in org.apache.calcite.rex">RexFieldAccess</a>&nbsp;fieldAccess)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor" id="i5">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitInputRef(org.apache.calcite.rex.RexInputRef)">visitInputRef</a></span>&#8203;(<a href="RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a>&nbsp;inputRef)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor" id="i6">
<td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a>&lt;<a href="RexVisitor.html" title="type parameter in RexVisitor">R</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitList(java.lang.Iterable)">visitList</a></span>&#8203;(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;? extends <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;&nbsp;exprs)</code></th>
<td class="colLast">
<div class="block">Visits a list and returns a list of the results.</div>
</td>
</tr>
<tr class="rowColor" id="i7">
<td class="colFirst"><code>default void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitList(java.lang.Iterable,java.util.List)">visitList</a></span>&#8203;(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;? extends <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;&nbsp;exprs,
<a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a>&lt;<a href="RexVisitor.html" title="type parameter in RexVisitor">R</a>&gt;&nbsp;out)</code></th>
<td class="colLast">
<div class="block">Visits a list and writes the results to another list.</div>
</td>
</tr>
<tr class="altColor" id="i8">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitLiteral(org.apache.calcite.rex.RexLiteral)">visitLiteral</a></span>&#8203;(<a href="RexLiteral.html" title="class in org.apache.calcite.rex">RexLiteral</a>&nbsp;literal)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor" id="i9">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitLocalRef(org.apache.calcite.rex.RexLocalRef)">visitLocalRef</a></span>&#8203;(<a href="RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a>&nbsp;localRef)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor" id="i10">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitOver(org.apache.calcite.rex.RexOver)">visitOver</a></span>&#8203;(<a href="RexOver.html" title="class in org.apache.calcite.rex">RexOver</a>&nbsp;over)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor" id="i11">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitPatternFieldRef(org.apache.calcite.rex.RexPatternFieldRef)">visitPatternFieldRef</a></span>&#8203;(<a href="RexPatternFieldRef.html" title="class in org.apache.calcite.rex">RexPatternFieldRef</a>&nbsp;fieldRef)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor" id="i12">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitRangeRef(org.apache.calcite.rex.RexRangeRef)">visitRangeRef</a></span>&#8203;(<a href="RexRangeRef.html" title="class in org.apache.calcite.rex">RexRangeRef</a>&nbsp;rangeRef)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor" id="i13">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitSubQuery(org.apache.calcite.rex.RexSubQuery)">visitSubQuery</a></span>&#8203;(<a href="RexSubQuery.html" title="class in org.apache.calcite.rex">RexSubQuery</a>&nbsp;subQuery)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor" id="i14">
<td class="colFirst"><code><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#visitTableInputRef(org.apache.calcite.rex.RexTableInputRef)">visitTableInputRef</a></span>&#8203;(<a href="RexTableInputRef.html" title="class in org.apache.calcite.rex">RexTableInputRef</a>&nbsp;fieldRef)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
</tbody>
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<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitInputRef</span>&#8203;(<span class="arguments"><a href="RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a>&nbsp;inputRef)</span></div>
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<h3><a id="visitLocalRef(org.apache.calcite.rex.RexLocalRef)">visitLocalRef</a></h3>
<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitLocalRef</span>&#8203;(<span class="arguments"><a href="RexLocalRef.html" title="class in org.apache.calcite.rex">RexLocalRef</a>&nbsp;localRef)</span></div>
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<h3><a id="visitLiteral(org.apache.calcite.rex.RexLiteral)">visitLiteral</a></h3>
<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitLiteral</span>&#8203;(<span class="arguments"><a href="RexLiteral.html" title="class in org.apache.calcite.rex">RexLiteral</a>&nbsp;literal)</span></div>
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<h3><a id="visitCall(org.apache.calcite.rex.RexCall)">visitCall</a></h3>
<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitCall</span>&#8203;(<span class="arguments"><a href="RexCall.html" title="class in org.apache.calcite.rex">RexCall</a>&nbsp;call)</span></div>
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<h3><a id="visitOver(org.apache.calcite.rex.RexOver)">visitOver</a></h3>
<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitOver</span>&#8203;(<span class="arguments"><a href="RexOver.html" title="class in org.apache.calcite.rex">RexOver</a>&nbsp;over)</span></div>
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<h3><a id="visitCorrelVariable(org.apache.calcite.rex.RexCorrelVariable)">visitCorrelVariable</a></h3>
<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitCorrelVariable</span>&#8203;(<span class="arguments"><a href="RexCorrelVariable.html" title="class in org.apache.calcite.rex">RexCorrelVariable</a>&nbsp;correlVariable)</span></div>
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<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitDynamicParam</span>&#8203;(<span class="arguments"><a href="RexDynamicParam.html" title="class in org.apache.calcite.rex">RexDynamicParam</a>&nbsp;dynamicParam)</span></div>
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<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitRangeRef</span>&#8203;(<span class="arguments"><a href="RexRangeRef.html" title="class in org.apache.calcite.rex">RexRangeRef</a>&nbsp;rangeRef)</span></div>
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<h3><a id="visitFieldAccess(org.apache.calcite.rex.RexFieldAccess)">visitFieldAccess</a></h3>
<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitFieldAccess</span>&#8203;(<span class="arguments"><a href="RexFieldAccess.html" title="class in org.apache.calcite.rex">RexFieldAccess</a>&nbsp;fieldAccess)</span></div>
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<h3><a id="visitSubQuery(org.apache.calcite.rex.RexSubQuery)">visitSubQuery</a></h3>
<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitSubQuery</span>&#8203;(<span class="arguments"><a href="RexSubQuery.html" title="class in org.apache.calcite.rex">RexSubQuery</a>&nbsp;subQuery)</span></div>
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<h3><a id="visitTableInputRef(org.apache.calcite.rex.RexTableInputRef)">visitTableInputRef</a></h3>
<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitTableInputRef</span>&#8203;(<span class="arguments"><a href="RexTableInputRef.html" title="class in org.apache.calcite.rex">RexTableInputRef</a>&nbsp;fieldRef)</span></div>
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<h3><a id="visitPatternFieldRef(org.apache.calcite.rex.RexPatternFieldRef)">visitPatternFieldRef</a></h3>
<div class="memberSignature"><span class="returnType"><a href="RexVisitor.html" title="type parameter in RexVisitor">R</a></span>&nbsp;<span class="memberName">visitPatternFieldRef</span>&#8203;(<span class="arguments"><a href="RexPatternFieldRef.html" title="class in org.apache.calcite.rex">RexPatternFieldRef</a>&nbsp;fieldRef)</span></div>
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<h3><a id="visitList(java.lang.Iterable,java.util.List)">visitList</a></h3>
<div class="memberSignature"><span class="modifiers">default</span>&nbsp;<span class="returnType">void</span>&nbsp;<span class="memberName">visitList</span>&#8203;(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;? extends <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;&nbsp;exprs,
<a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a>&lt;<a href="RexVisitor.html" title="type parameter in RexVisitor">R</a>&gt;&nbsp;out)</span></div>
<div class="block">Visits a list and writes the results to another list.</div>
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<h3><a id="visitList(java.lang.Iterable)">visitList</a></h3>
<div class="memberSignature"><span class="modifiers">default</span>&nbsp;<span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a>&lt;<a href="RexVisitor.html" title="type parameter in RexVisitor">R</a>&gt;</span>&nbsp;<span class="memberName">visitList</span>&#8203;(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;? extends <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;&nbsp;exprs)</span></div>
<div class="block">Visits a list and returns a list of the results.
The resulting list is immutable and does not contain nulls.</div>
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<h3><a id="visitEach(java.lang.Iterable)">visitEach</a></h3>
<div class="memberSignature"><span class="modifiers">default</span>&nbsp;<span class="returnType">void</span>&nbsp;<span class="memberName">visitEach</span>&#8203;(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Iterable</a>&lt;? extends <a href="RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;&nbsp;exprs)</span></div>
<div class="block">Visits a list of expressions.</div>
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