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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.plan</a></div>
<h2 title="Interface RelOptNode" class="title">Interface RelOptNode</h2>
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<dt>All Known Subinterfaces:</dt>
<dd><code><a href="../interpreter/BindableRel.html" title="interface in org.apache.calcite.interpreter">BindableRel</a></code>, <code><a href="../adapter/cassandra/CassandraRel.html" title="interface in org.apache.calcite.adapter.cassandra">CassandraRel</a></code>, <code><a href="../rel/convert/Converter.html" title="interface in org.apache.calcite.rel.convert">Converter</a></code>, <code><a href="../adapter/elasticsearch/ElasticsearchRel.html" title="interface in org.apache.calcite.adapter.elasticsearch">ElasticsearchRel</a></code>, <code><a href="../adapter/enumerable/EnumerableRel.html" title="interface in org.apache.calcite.adapter.enumerable">EnumerableRel</a></code>, <code><a href="../adapter/geode/rel/GeodeRel.html" title="interface in org.apache.calcite.adapter.geode.rel">GeodeRel</a></code>, <code><a href="../interpreter/InterpretableRel.html" title="interface in org.apache.calcite.interpreter">InterpretableRel</a></code>, <code><a href="../adapter/jdbc/JdbcRel.html" title="interface in org.apache.calcite.adapter.jdbc">JdbcRel</a></code>, <code><a href="../adapter/mongodb/MongoRel.html" title="interface in org.apache.calcite.adapter.mongodb">MongoRel</a></code>, <code><a href="../adapter/pig/PigRel.html" title="interface in org.apache.calcite.adapter.pig">PigRel</a></code>, <code><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code>, <code><a href="../sql2rel/RelStructuredTypeFlattener.SelfFlatteningRel.html" title="interface in org.apache.calcite.sql2rel">RelStructuredTypeFlattener.SelfFlatteningRel</a></code>, <code><a href="../adapter/spark/SparkRel.html" title="interface in org.apache.calcite.adapter.spark">SparkRel</a></code></dd>
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<dl>
<dt>All Known Implementing Classes:</dt>
<dd><code><a href="volcano/AbstractConverter.html" title="class in org.apache.calcite.plan.volcano">AbstractConverter</a></code>, <code><a href="../rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code>, <code><a href="../rel/core/Aggregate.html" title="class in org.apache.calcite.rel.core">Aggregate</a></code>, <code><a href="../interpreter/Bindables.BindableAggregate.html" title="class in org.apache.calcite.interpreter">Bindables.BindableAggregate</a></code>, <code><a href="../interpreter/Bindables.BindableFilter.html" title="class in org.apache.calcite.interpreter">Bindables.BindableFilter</a></code>, <code><a href="../interpreter/Bindables.BindableJoin.html" title="class in org.apache.calcite.interpreter">Bindables.BindableJoin</a></code>, <code><a href="../interpreter/Bindables.BindableMatch.html" title="class in org.apache.calcite.interpreter">Bindables.BindableMatch</a></code>, <code><a href="../interpreter/Bindables.BindableProject.html" title="class in org.apache.calcite.interpreter">Bindables.BindableProject</a></code>, <code><a href="../interpreter/Bindables.BindableSort.html" title="class in org.apache.calcite.interpreter">Bindables.BindableSort</a></code>, <code><a href="../interpreter/Bindables.BindableTableScan.html" title="class in org.apache.calcite.interpreter">Bindables.BindableTableScan</a></code>, <code><a href="../interpreter/Bindables.BindableUnion.html" title="class in org.apache.calcite.interpreter">Bindables.BindableUnion</a></code>, <code><a href="../interpreter/Bindables.BindableValues.html" title="class in org.apache.calcite.interpreter">Bindables.BindableValues</a></code>, <code><a href="../interpreter/Bindables.BindableWindow.html" title="class in org.apache.calcite.interpreter">Bindables.BindableWindow</a></code>, <code><a href="../rel/BiRel.html" title="class in org.apache.calcite.rel">BiRel</a></code>, <code><a href="../rel/core/Calc.html" title="class in org.apache.calcite.rel.core">Calc</a></code>, <code><a href="../adapter/cassandra/CassandraFilter.html" title="class in org.apache.calcite.adapter.cassandra">CassandraFilter</a></code>, <code><a href="../adapter/cassandra/CassandraLimit.html" title="class in org.apache.calcite.adapter.cassandra">CassandraLimit</a></code>, <code><a href="../adapter/cassandra/CassandraProject.html" title="class in org.apache.calcite.adapter.cassandra">CassandraProject</a></code>, <code><a href="../adapter/cassandra/CassandraSort.html" title="class in org.apache.calcite.adapter.cassandra">CassandraSort</a></code>, <code><a href="../adapter/cassandra/CassandraTableScan.html" title="class in org.apache.calcite.adapter.cassandra">CassandraTableScan</a></code>, <code><a href="../adapter/cassandra/CassandraToEnumerableConverter.html" title="class in org.apache.calcite.adapter.cassandra">CassandraToEnumerableConverter</a></code>, <code><a href="../rel/stream/Chi.html" title="class in org.apache.calcite.rel.stream">Chi</a></code>, <code><a href="../rel/core/Collect.html" title="class in org.apache.calcite.rel.core">Collect</a></code>, <code><a href="../rel/convert/ConverterImpl.html" title="class in org.apache.calcite.rel.convert">ConverterImpl</a></code>, <code><a href="../rel/core/Correlate.html" title="class in org.apache.calcite.rel.core">Correlate</a></code>, <code><a href="../adapter/csv/CsvTableScan.html" title="class in org.apache.calcite.adapter.csv">CsvTableScan</a></code>, <code><a href="../rel/stream/Delta.html" title="class in org.apache.calcite.rel.stream">Delta</a></code>, <code><a href="../adapter/druid/DruidQuery.html" title="class in org.apache.calcite.adapter.druid">DruidQuery</a></code>, <code><a href="../adapter/elasticsearch/ElasticsearchAggregate.html" title="class in org.apache.calcite.adapter.elasticsearch">ElasticsearchAggregate</a></code>, <code><a href="../adapter/elasticsearch/ElasticsearchFilter.html" title="class in org.apache.calcite.adapter.elasticsearch">ElasticsearchFilter</a></code>, <code><a href="../adapter/elasticsearch/ElasticsearchProject.html" title="class in org.apache.calcite.adapter.elasticsearch">ElasticsearchProject</a></code>, <code><a href="../adapter/elasticsearch/ElasticsearchSort.html" title="class in org.apache.calcite.adapter.elasticsearch">ElasticsearchSort</a></code>, <code><a href="../adapter/elasticsearch/ElasticsearchTableScan.html" title="class in org.apache.calcite.adapter.elasticsearch">ElasticsearchTableScan</a></code>, <code><a href="../adapter/elasticsearch/ElasticsearchToEnumerableConverter.html" title="class in org.apache.calcite.adapter.elasticsearch">ElasticsearchToEnumerableConverter</a></code>, <code><a href="../adapter/enumerable/EnumerableAggregate.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableAggregate</a></code>, <code><a href="../adapter/enumerable/EnumerableBatchNestedLoopJoin.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableBatchNestedLoopJoin</a></code>, <code><a href="../adapter/enumerable/EnumerableBindable.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableBindable</a></code>, <code><a href="../adapter/enumerable/EnumerableCalc.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableCalc</a></code>, <code><a href="../adapter/enumerable/EnumerableCollect.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableCollect</a></code>, <code><a href="../adapter/enumerable/EnumerableCorrelate.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableCorrelate</a></code>, <code><a href="../adapter/enumerable/EnumerableFilter.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableFilter</a></code>, <code><a href="../adapter/enumerable/EnumerableHashJoin.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableHashJoin</a></code>, <code><a href="../adapter/enumerable/EnumerableInterpretable.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableInterpretable</a></code>, <code><a href="../adapter/enumerable/EnumerableInterpreter.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableInterpreter</a></code>, <code><a href="../adapter/enumerable/EnumerableIntersect.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableIntersect</a></code>, <code><a href="../adapter/enumerable/EnumerableLimit.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableLimit</a></code>, <code><a href="../adapter/enumerable/EnumerableMatch.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableMatch</a></code>, <code><a href="../adapter/enumerable/EnumerableMergeJoin.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableMergeJoin</a></code>, <code><a href="../adapter/enumerable/EnumerableMinus.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableMinus</a></code>, <code><a href="../adapter/enumerable/EnumerableNestedLoopJoin.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableNestedLoopJoin</a></code>, <code><a href="../adapter/enumerable/EnumerableProject.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableProject</a></code>, <code><a href="../adapter/enumerable/EnumerableRepeatUnion.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableRepeatUnion</a></code>, <code><a href="../adapter/enumerable/EnumerableSort.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableSort</a></code>, <code><a href="../adapter/enumerable/EnumerableTableFunctionScan.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableTableFunctionScan</a></code>, <code><a href="../adapter/enumerable/EnumerableTableModify.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableTableModify</a></code>, <code><a href="../adapter/enumerable/EnumerableTableScan.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableTableScan</a></code>, <code><a href="../adapter/enumerable/EnumerableTableSpool.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableTableSpool</a></code>, <code><a href="../adapter/spark/EnumerableToSparkConverter.html" title="class in org.apache.calcite.adapter.spark">EnumerableToSparkConverter</a></code>, <code><a href="../adapter/enumerable/EnumerableUncollect.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableUncollect</a></code>, <code><a href="../adapter/enumerable/EnumerableUnion.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableUnion</a></code>, <code><a href="../adapter/enumerable/EnumerableValues.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableValues</a></code>, <code><a href="../adapter/enumerable/EnumerableWindow.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableWindow</a></code>, <code><a href="../rel/core/EquiJoin.html" title="class in org.apache.calcite.rel.core">EquiJoin</a></code>, <code><a href="../rel/rules/EquiJoin.html" title="class in org.apache.calcite.rel.rules">EquiJoin</a></code>, <code><a href="../rel/core/Exchange.html" title="class in org.apache.calcite.rel.core">Exchange</a></code>, <code><a href="../adapter/file/FileTableScan.html" title="class in org.apache.calcite.adapter.file">FileTableScan</a></code>, <code><a href="../rel/core/Filter.html" title="class in org.apache.calcite.rel.core">Filter</a></code>, <code><a href="../adapter/geode/rel/GeodeAggregate.html" title="class in org.apache.calcite.adapter.geode.rel">GeodeAggregate</a></code>, <code><a href="../adapter/geode/rel/GeodeFilter.html" title="class in org.apache.calcite.adapter.geode.rel">GeodeFilter</a></code>, <code><a href="../adapter/geode/rel/GeodeProject.html" title="class in org.apache.calcite.adapter.geode.rel">GeodeProject</a></code>, <code><a href="../adapter/geode/rel/GeodeSort.html" title="class in org.apache.calcite.adapter.geode.rel">GeodeSort</a></code>, <code><a href="../adapter/geode/rel/GeodeTableScan.html" title="class in org.apache.calcite.adapter.geode.rel">GeodeTableScan</a></code>, <code><a href="../adapter/geode/rel/GeodeToEnumerableConverter.html" title="class in org.apache.calcite.adapter.geode.rel">GeodeToEnumerableConverter</a></code>, <code><a href="hep/HepRelVertex.html" title="class in org.apache.calcite.plan.hep">HepRelVertex</a></code>, <code><a href="../interpreter/InterpretableConverter.html" title="class in org.apache.calcite.interpreter">InterpretableConverter</a></code>, <code><a href="../rel/core/Intersect.html" title="class in org.apache.calcite.rel.core">Intersect</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcAggregate.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcAggregate</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcCalc.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcCalc</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcFilter.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcFilter</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcIntersect.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcIntersect</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcJoin.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcJoin</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcMinus.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcMinus</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcProject.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcProject</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcSort.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcSort</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcTableModify.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcTableModify</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcUnion.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcUnion</a></code>, <code><a href="../adapter/jdbc/JdbcRules.JdbcValues.html" title="class in org.apache.calcite.adapter.jdbc">JdbcRules.JdbcValues</a></code>, <code><a href="../adapter/jdbc/JdbcTableScan.html" title="class in org.apache.calcite.adapter.jdbc">JdbcTableScan</a></code>, <code><a href="../adapter/jdbc/JdbcToEnumerableConverter.html" title="class in org.apache.calcite.adapter.jdbc">JdbcToEnumerableConverter</a></code>, <code><a href="../adapter/spark/JdbcToSparkConverter.html" title="class in org.apache.calcite.adapter.spark">JdbcToSparkConverter</a></code>, <code><a href="../rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a></code>, <code><a href="../rel/logical/LogicalAggregate.html" title="class in org.apache.calcite.rel.logical">LogicalAggregate</a></code>, <code><a href="../rel/logical/LogicalCalc.html" title="class in org.apache.calcite.rel.logical">LogicalCalc</a></code>, <code><a href="../rel/stream/LogicalChi.html" title="class in org.apache.calcite.rel.stream">LogicalChi</a></code>, <code><a href="../rel/logical/LogicalCorrelate.html" title="class in org.apache.calcite.rel.logical">LogicalCorrelate</a></code>, <code><a href="../rel/stream/LogicalDelta.html" title="class in org.apache.calcite.rel.stream">LogicalDelta</a></code>, <code><a href="../rel/logical/LogicalExchange.html" title="class in org.apache.calcite.rel.logical">LogicalExchange</a></code>, <code><a href="../rel/logical/LogicalFilter.html" title="class in org.apache.calcite.rel.logical">LogicalFilter</a></code>, <code><a href="../rel/logical/LogicalIntersect.html" title="class in org.apache.calcite.rel.logical">LogicalIntersect</a></code>, <code><a href="../rel/logical/LogicalJoin.html" title="class in org.apache.calcite.rel.logical">LogicalJoin</a></code>, <code><a href="../rel/logical/LogicalMatch.html" title="class in org.apache.calcite.rel.logical">LogicalMatch</a></code>, <code><a href="../rel/logical/LogicalMinus.html" title="class in org.apache.calcite.rel.logical">LogicalMinus</a></code>, <code><a href="../rel/logical/LogicalProject.html" title="class in org.apache.calcite.rel.logical">LogicalProject</a></code>, <code><a href="../rel/logical/LogicalRepeatUnion.html" title="class in org.apache.calcite.rel.logical">LogicalRepeatUnion</a></code>, <code><a href="../rel/logical/LogicalSnapshot.html" title="class in org.apache.calcite.rel.logical">LogicalSnapshot</a></code>, <code><a href="../rel/logical/LogicalSort.html" title="class in org.apache.calcite.rel.logical">LogicalSort</a></code>, <code><a href="../rel/logical/LogicalSortExchange.html" title="class in org.apache.calcite.rel.logical">LogicalSortExchange</a></code>, <code><a href="../rel/logical/LogicalTableFunctionScan.html" title="class in org.apache.calcite.rel.logical">LogicalTableFunctionScan</a></code>, <code><a href="../rel/logical/LogicalTableModify.html" title="class in org.apache.calcite.rel.logical">LogicalTableModify</a></code>, <code><a href="../rel/logical/LogicalTableScan.html" title="class in org.apache.calcite.rel.logical">LogicalTableScan</a></code>, <code><a href="../rel/logical/LogicalTableSpool.html" title="class in org.apache.calcite.rel.logical">LogicalTableSpool</a></code>, <code><a href="../rel/logical/LogicalUnion.html" title="class in org.apache.calcite.rel.logical">LogicalUnion</a></code>, <code><a href="../rel/logical/LogicalValues.html" title="class in org.apache.calcite.rel.logical">LogicalValues</a></code>, <code><a href="../rel/logical/LogicalWindow.html" title="class in org.apache.calcite.rel.logical">LogicalWindow</a></code>, <code><a href="../rel/core/Match.html" title="class in org.apache.calcite.rel.core">Match</a></code>, <code><a href="../rel/core/Minus.html" title="class in org.apache.calcite.rel.core">Minus</a></code>, <code><a href="../adapter/mongodb/MongoAggregate.html" title="class in org.apache.calcite.adapter.mongodb">MongoAggregate</a></code>, <code><a href="../adapter/mongodb/MongoFilter.html" title="class in org.apache.calcite.adapter.mongodb">MongoFilter</a></code>, <code><a href="../adapter/mongodb/MongoProject.html" title="class in org.apache.calcite.adapter.mongodb">MongoProject</a></code>, <code><a href="../adapter/mongodb/MongoSort.html" title="class in org.apache.calcite.adapter.mongodb">MongoSort</a></code>, <code><a href="../adapter/mongodb/MongoTableScan.html" title="class in org.apache.calcite.adapter.mongodb">MongoTableScan</a></code>, <code><a href="../adapter/mongodb/MongoToEnumerableConverter.html" title="class in org.apache.calcite.adapter.mongodb">MongoToEnumerableConverter</a></code>, <code><a href="../rel/rules/MultiJoin.html" title="class in org.apache.calcite.rel.rules">MultiJoin</a></code>, <code><a href="../rel/convert/NoneConverter.html" title="class in org.apache.calcite.rel.convert">NoneConverter</a></code>, <code><a href="../adapter/pig/PigAggregate.html" title="class in org.apache.calcite.adapter.pig">PigAggregate</a></code>, <code><a href="../adapter/pig/PigFilter.html" title="class in org.apache.calcite.adapter.pig">PigFilter</a></code>, <code><a href="../adapter/pig/PigJoin.html" title="class in org.apache.calcite.adapter.pig">PigJoin</a></code>, <code><a href="../adapter/pig/PigProject.html" title="class in org.apache.calcite.adapter.pig">PigProject</a></code>, <code><a href="../adapter/pig/PigTableScan.html" title="class in org.apache.calcite.adapter.pig">PigTableScan</a></code>, <code><a href="../adapter/pig/PigToEnumerableConverter.html" title="class in org.apache.calcite.adapter.pig">PigToEnumerableConverter</a></code>, <code><a href="../rel/core/Project.html" title="class in org.apache.calcite.rel.core">Project</a></code>, <code><a href="volcano/RelSubset.html" title="class in org.apache.calcite.plan.volcano">RelSubset</a></code>, <code><a href="../rel/core/RepeatUnion.html" title="class in org.apache.calcite.rel.core">RepeatUnion</a></code>, <code><a href="../rel/core/Sample.html" title="class in org.apache.calcite.rel.core">Sample</a></code>, <code><a href="../rel/core/SetOp.html" title="class in org.apache.calcite.rel.core">SetOp</a></code>, <code><a href="../rel/SingleRel.html" title="class in org.apache.calcite.rel">SingleRel</a></code>, <code><a href="../rel/core/Snapshot.html" title="class in org.apache.calcite.rel.core">Snapshot</a></code>, <code><a href="../rel/core/Sort.html" title="class in org.apache.calcite.rel.core">Sort</a></code>, <code><a href="../rel/core/SortExchange.html" title="class in org.apache.calcite.rel.core">SortExchange</a></code>, <code><a href="../adapter/spark/SparkRules.SparkCalc.html" title="class in org.apache.calcite.adapter.spark">SparkRules.SparkCalc</a></code>, <code><a href="../adapter/spark/SparkRules.SparkValues.html" title="class in org.apache.calcite.adapter.spark">SparkRules.SparkValues</a></code>, <code><a href="../adapter/spark/SparkToEnumerableConverter.html" title="class in org.apache.calcite.adapter.spark">SparkToEnumerableConverter</a></code>, <code><a href="../adapter/splunk/SplunkTableScan.html" title="class in org.apache.calcite.adapter.splunk">SplunkTableScan</a></code>, <code><a href="../rel/core/Spool.html" title="class in org.apache.calcite.rel.core">Spool</a></code>, <code><a href="../schema/impl/StarTable.StarTableScan.html" title="class in org.apache.calcite.schema.impl">StarTable.StarTableScan</a></code>, <code><a href="../rel/core/TableFunctionScan.html" title="class in org.apache.calcite.rel.core">TableFunctionScan</a></code>, <code><a href="../rel/core/TableModify.html" title="class in org.apache.calcite.rel.core">TableModify</a></code>, <code><a href="../rel/core/TableScan.html" title="class in org.apache.calcite.rel.core">TableScan</a></code>, <code><a href="../rel/core/TableSpool.html" title="class in org.apache.calcite.rel.core">TableSpool</a></code>, <code><a href="../rel/core/Uncollect.html" title="class in org.apache.calcite.rel.core">Uncollect</a></code>, <code><a href="../rel/core/Union.html" title="class in org.apache.calcite.rel.core">Union</a></code>, <code><a href="../rel/core/Values.html" title="class in org.apache.calcite.rel.core">Values</a></code>, <code><a href="../rel/core/Window.html" title="class in org.apache.calcite.rel.core">Window</a></code></dd>
</dl>
<hr>
<pre>public interface <span class="typeNameLabel">RelOptNode</span></pre>
<div class="block">Node in a planner.</div>
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<h3>Method Summary</h3>
<table class="memberSummary">
<caption><span id="t0" class="activeTableTab"><span>All Methods</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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract 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><a href="RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getCluster()">getCluster</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the cluster this relational expression belongs to.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDescription()">getDescription</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a string which describes the relational expression and, unlike
<a href="#getDigest()"><code>getDigest()</code></a>, also includes the identity.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDigest()">getDigest</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a string which concisely describes the definition of this
relational expression.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getId()">getId</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the ID of this relational expression, unique among all relational
expressions created since the server was started.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>java.util.List&lt;? extends <a href="RelOptNode.html" title="interface in org.apache.calcite.plan">RelOptNode</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getInputs()">getInputs</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns an array of this relational expression's inputs.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getRowType()">getRowType</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTraitSet()">getTraitSet</a></span>()</code></th>
<td class="colLast">
<div class="block">Retrieves this RelNode's traits.</div>
</td>
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<h3>Method Detail</h3>
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<h4>getId</h4>
<pre class="methodSignature">int&nbsp;getId()</pre>
<div class="block">Returns the ID of this relational expression, unique among all relational
expressions created since the server was started.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Unique ID</dd>
</dl>
</li>
</ul>
<a id="getDigest()">
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</a>
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<h4>getDigest</h4>
<pre class="methodSignature">java.lang.String&nbsp;getDigest()</pre>
<div class="block">Returns a string which concisely describes the definition of this
relational expression. Two relational expressions are equivalent if
their digests and <a href="#getRowType()"><code>getRowType()</code></a> are the same.
<p>The digest does not contain the relational expression's identity --
that would prevent similar relational expressions from ever comparing
equal -- but does include the identity of children (on the assumption
that children have already been normalized).
<p>If you want a descriptive string which contains the identity, call
<code>Object.toString()</code>, which always returns "rel#{id}:{digest}".</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Digest of this <code>RelNode</code></dd>
</dl>
</li>
</ul>
<a id="getTraitSet()">
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<h4>getTraitSet</h4>
<pre class="methodSignature"><a href="RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;getTraitSet()</pre>
<div class="block">Retrieves this RelNode's traits. Note that although the RelTraitSet
returned is modifiable, it <b>must not</b> be modified during
optimization. It is legal to modify the traits of a RelNode before or
after optimization, although doing so could render a tree of RelNodes
unimplementable. If a RelNode's traits need to be modified during
optimization, clone the RelNode and change the clone's traits.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>this RelNode's trait set</dd>
</dl>
</li>
</ul>
<a id="getRowType()">
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<h4>getRowType</h4>
<pre class="methodSignature"><a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;getRowType()</pre>
</li>
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</a>
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<h4>getDescription</h4>
<pre class="methodSignature">java.lang.String&nbsp;getDescription()</pre>
<div class="block">Returns a string which describes the relational expression and, unlike
<a href="#getDigest()"><code>getDigest()</code></a>, also includes the identity. Typically returns
"rel#{id}:{digest}".</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>String which describes the relational expression and, unlike
<a href="#getDigest()"><code>getDigest()</code></a>, also includes the identity</dd>
</dl>
</li>
</ul>
<a id="getInputs()">
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<h4>getInputs</h4>
<pre class="methodSignature">java.util.List&lt;? extends <a href="RelOptNode.html" title="interface in org.apache.calcite.plan">RelOptNode</a>&gt;&nbsp;getInputs()</pre>
<div class="block">Returns an array of this relational expression's inputs. If there are no
inputs, returns an empty list, not <code>null</code>.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Array of this relational expression's inputs</dd>
</dl>
</li>
</ul>
<a id="getCluster()">
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<h4>getCluster</h4>
<pre class="methodSignature"><a href="RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;getCluster()</pre>
<div class="block">Returns the cluster this relational expression belongs to.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>cluster</dd>
</dl>
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