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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.rel.core</a></div>
<h2 title="Class SemiJoin" class="title">Class SemiJoin</h2>
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<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li><a href="../AbstractRelNode.html" title="class in org.apache.calcite.rel">org.apache.calcite.rel.AbstractRelNode</a></li>
<li>
<ul class="inheritance">
<li><a href="../BiRel.html" title="class in org.apache.calcite.rel">org.apache.calcite.rel.BiRel</a></li>
<li>
<ul class="inheritance">
<li><a href="Join.html" title="class in org.apache.calcite.rel.core">org.apache.calcite.rel.core.Join</a></li>
<li>
<ul class="inheritance">
<li><a href="EquiJoin.html" title="class in org.apache.calcite.rel.core">org.apache.calcite.rel.core.EquiJoin</a></li>
<li>
<ul class="inheritance">
<li>org.apache.calcite.rel.core.SemiJoin</li>
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<dt>All Implemented Interfaces:</dt>
<dd><code>java.lang.Cloneable</code>, <code><a href="../../plan/RelOptNode.html" title="interface in org.apache.calcite.plan">RelOptNode</a></code>, <code><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><code><a href="../../adapter/enumerable/EnumerableSemiJoin.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableSemiJoin</a></code></dd>
</dl>
<hr>
<pre>@Deprecated
public class <span class="typeNameLabel">SemiJoin</span>
extends <a href="EquiJoin.html" title="class in org.apache.calcite.rel.core">EquiJoin</a></pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span>
<div class="deprecationComment">This class is deprecated, please use
<a href="../logical/LogicalJoin.html" title="class in org.apache.calcite.rel.logical"><code>LogicalJoin</code></a> with join type <a href="JoinRelType.html#SEMI"><code>JoinRelType.SEMI</code></a>
instead.</div>
</div>
<div class="block">Relational expression that joins two relational expressions according to some
condition, but outputs only columns from the left input, and eliminates
duplicates.
<p>The effect is something like the SQL <code>IN</code> operator.</div>
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<h3>Nested classes/interfaces inherited from interface&nbsp;org.apache.calcite.rel.<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></h3>
<code><a href="../RelNode.Context.html" title="interface in org.apache.calcite.rel">RelNode.Context</a></code></li>
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<h3>Fields inherited from class&nbsp;org.apache.calcite.rel.core.<a href="EquiJoin.html" title="class in org.apache.calcite.rel.core">EquiJoin</a></h3>
<code><a href="EquiJoin.html#leftKeys">leftKeys</a>, <a href="EquiJoin.html#rightKeys">rightKeys</a></code></li>
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<h3>Fields inherited from class&nbsp;org.apache.calcite.rel.core.<a href="Join.html" title="class in org.apache.calcite.rel.core">Join</a></h3>
<code><a href="Join.html#condition">condition</a>, <a href="Join.html#joinInfo">joinInfo</a>, <a href="Join.html#joinType">joinType</a>, <a href="Join.html#variablesSet">variablesSet</a></code></li>
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<code><a href="../BiRel.html#left">left</a>, <a href="../BiRel.html#right">right</a></code></li>
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<code><a href="../AbstractRelNode.html#digest">digest</a>, <a href="../AbstractRelNode.html#id">id</a>, <a href="../AbstractRelNode.html#rowType">rowType</a>, <a href="../AbstractRelNode.html#traitSet">traitSet</a></code></li>
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<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.plan.RelOptCluster,org.apache.calcite.plan.RelTraitSet,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rex.RexNode,org.apache.calcite.util.ImmutableIntList,org.apache.calcite.util.ImmutableIntList)">SemiJoin</a></span>&#8203;(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;cluster,
<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;traitSet,
<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;left,
<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;right,
<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition,
<a href="../../util/ImmutableIntList.html" title="class in org.apache.calcite.util">ImmutableIntList</a>&nbsp;leftKeys,
<a href="../../util/ImmutableIntList.html" title="class in org.apache.calcite.util">ImmutableIntList</a>&nbsp;rightKeys)</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block">Creates a SemiJoin.</div>
</td>
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<h3>Method Summary</h3>
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<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><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code><a href="../../plan/RelOptCost.html" title="interface in org.apache.calcite.plan">RelOptCost</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#computeSelfCost(org.apache.calcite.plan.RelOptPlanner,org.apache.calcite.rel.metadata.RelMetadataQuery)">computeSelfCost</a></span>&#8203;(<a href="../../plan/RelOptPlanner.html" title="interface in org.apache.calcite.plan">RelOptPlanner</a>&nbsp;planner,
<a href="../metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq)</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block">Returns the cost of this plan (not including children).</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="SemiJoin.html" title="class in org.apache.calcite.rel.core">SemiJoin</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#copy(org.apache.calcite.plan.RelTraitSet,org.apache.calcite.rex.RexNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.core.JoinRelType,boolean)">copy</a></span>&#8203;(<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;traitSet,
<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition,
<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;left,
<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;right,
<a href="JoinRelType.html" title="enum in org.apache.calcite.rel.core">JoinRelType</a>&nbsp;joinType,
boolean&nbsp;semiJoinDone)</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block">Creates a copy of this join, overriding condition, system fields and
inputs.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static <a href="SemiJoin.html" title="class in org.apache.calcite.rel.core">SemiJoin</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#create(org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rex.RexNode,org.apache.calcite.util.ImmutableIntList,org.apache.calcite.util.ImmutableIntList)">create</a></span>&#8203;(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;left,
<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;right,
<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition,
<a href="../../util/ImmutableIntList.html" title="class in org.apache.calcite.util">ImmutableIntList</a>&nbsp;leftKeys,
<a href="../../util/ImmutableIntList.html" title="class in org.apache.calcite.util">ImmutableIntList</a>&nbsp;rightKeys)</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block">Creates a SemiJoin.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../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="#deriveRowType()">deriveRowType</a></span>()</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>double</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery)">estimateRowCount</a></span>&#8203;(<a href="../metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq)</code></th>
<td class="colLast">
<div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block">Returns an estimate of the number of rows this relational expression will
return.</div>
</td>
</tr>
</table>
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<h3>Methods inherited from class&nbsp;org.apache.calcite.rel.core.<a href="EquiJoin.html" title="class in org.apache.calcite.rel.core">EquiJoin</a></h3>
<code><a href="EquiJoin.html#getLeftKeys()">getLeftKeys</a>, <a href="EquiJoin.html#getRightKeys()">getRightKeys</a></code></li>
</ul>
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<h3>Methods inherited from class&nbsp;org.apache.calcite.rel.core.<a href="Join.html" title="class in org.apache.calcite.rel.core">Join</a></h3>
<code><a href="Join.html#accept(org.apache.calcite.rex.RexShuttle)">accept</a>, <a href="Join.html#analyzeCondition()">analyzeCondition</a>, <a href="Join.html#copy(org.apache.calcite.plan.RelTraitSet,java.util.List)">copy</a>, <a href="Join.html#createJoinType(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,java.util.List,java.util.List)">createJoinType</a>, <a href="Join.html#deriveJoinRowType(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.JoinRelType,org.apache.calcite.rel.type.RelDataTypeFactory,java.util.List,java.util.List)">deriveJoinRowType</a>, <a href="Join.html#estimateJoinedRows(org.apache.calcite.rel.core.Join,org.apache.calcite.rex.RexNode)">estimateJoinedRows</a>, <a href="Join.html#explainTerms(org.apache.calcite.rel.RelWriter)">explainTerms</a>, <a href="Join.html#getChildExps()">getChildExps</a>, <a href="Join.html#getCondition()">getCondition</a>, <a href="Join.html#getJoinType()">getJoinType</a>, <a href="Join.html#getSystemFieldList()">getSystemFieldList</a>, <a href="Join.html#getVariablesSet()">getVariablesSet</a>, <a href="Join.html#isSemiJoin()">isSemiJoin</a>, <a href="Join.html#isSemiJoinDone()">isSemiJoinDone</a>, <a href="Join.html#isValid(org.apache.calcite.util.Litmus,org.apache.calcite.rel.RelNode.Context)">isValid</a></code></li>
</ul>
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<h3>Methods inherited from class&nbsp;org.apache.calcite.rel.<a href="../BiRel.html" title="class in org.apache.calcite.rel">BiRel</a></h3>
<code><a href="../BiRel.html#childrenAccept(org.apache.calcite.rel.RelVisitor)">childrenAccept</a>, <a href="../BiRel.html#getInputs()">getInputs</a>, <a href="../BiRel.html#getLeft()">getLeft</a>, <a href="../BiRel.html#getRight()">getRight</a>, <a href="../BiRel.html#replaceInput(int,org.apache.calcite.rel.RelNode)">replaceInput</a></code></li>
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<h3>Methods inherited from class&nbsp;org.apache.calcite.rel.<a href="../AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></h3>
<code><a href="../AbstractRelNode.html#accept(org.apache.calcite.rel.RelShuttle)">accept</a>, <a href="../AbstractRelNode.html#collectVariablesSet(java.util.Set)">collectVariablesSet</a>, <a href="../AbstractRelNode.html#collectVariablesUsed(java.util.Set)">collectVariablesUsed</a>, <a href="../AbstractRelNode.html#computeDigest()">computeDigest</a>, <a href="../AbstractRelNode.html#computeSelfCost(org.apache.calcite.plan.RelOptPlanner)">computeSelfCost</a>, <a href="../AbstractRelNode.html#explain(org.apache.calcite.rel.RelWriter)">explain</a>, <a href="../AbstractRelNode.html#getCluster()">getCluster</a>, <a href="../AbstractRelNode.html#getCollationList()">getCollationList</a>, <a href="../AbstractRelNode.html#getConvention()">getConvention</a>, <a href="../AbstractRelNode.html#getCorrelVariable()">getCorrelVariable</a>, <a href="../AbstractRelNode.html#getDescription()">getDescription</a>, <a href="../AbstractRelNode.html#getDigest()">getDigest</a>, <a href="../AbstractRelNode.html#getExpectedInputRowType(int)">getExpectedInputRowType</a>, <a href="../AbstractRelNode.html#getId()">getId</a>, <a href="../AbstractRelNode.html#getInput(int)">getInput</a>, <a href="../AbstractRelNode.html#getQuery()">getQuery</a>, <a href="../AbstractRelNode.html#getRelTypeName()">getRelTypeName</a>, <a href="../AbstractRelNode.html#getRows()">getRows</a>, <a href="../AbstractRelNode.html#getRowType()">getRowType</a>, <a href="../AbstractRelNode.html#getTable()">getTable</a>, <a href="../AbstractRelNode.html#getTraitSet()">getTraitSet</a>, <a href="../AbstractRelNode.html#getVariablesStopped()">getVariablesStopped</a>, <a href="../AbstractRelNode.html#isDistinct()">isDistinct</a>, <a href="../AbstractRelNode.html#isKey(org.apache.calcite.util.ImmutableBitSet)">isKey</a>, <a href="../AbstractRelNode.html#isValid(boolean)">isValid</a>, <a href="../AbstractRelNode.html#metadata(java.lang.Class,org.apache.calcite.rel.metadata.RelMetadataQuery)">metadata</a>, <a href="../AbstractRelNode.html#onRegister(org.apache.calcite.plan.RelOptPlanner)">onRegister</a>, <a href="../AbstractRelNode.html#recomputeDigest()">recomputeDigest</a>, <a href="../AbstractRelNode.html#register(org.apache.calcite.plan.RelOptPlanner)">register</a>, <a href="../AbstractRelNode.html#sole(java.util.List)">sole</a>, <a href="../AbstractRelNode.html#toString()">toString</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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<h3>Constructor Detail</h3>
<a id="&lt;init&gt;(org.apache.calcite.plan.RelOptCluster,org.apache.calcite.plan.RelTraitSet,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rex.RexNode,org.apache.calcite.util.ImmutableIntList,org.apache.calcite.util.ImmutableIntList)">
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<h4>SemiJoin</h4>
<pre>public&nbsp;SemiJoin&#8203;(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;cluster,
<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;traitSet,
<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;left,
<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;right,
<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition,
<a href="../../util/ImmutableIntList.html" title="class in org.apache.calcite.util">ImmutableIntList</a>&nbsp;leftKeys,
<a href="../../util/ImmutableIntList.html" title="class in org.apache.calcite.util">ImmutableIntList</a>&nbsp;rightKeys)</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block">Creates a SemiJoin.
<p>Use <a href="#create(org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rex.RexNode,org.apache.calcite.util.ImmutableIntList,org.apache.calcite.util.ImmutableIntList)"><code>create(org.apache.calcite.rel.RelNode, org.apache.calcite.rel.RelNode, org.apache.calcite.rex.RexNode, org.apache.calcite.util.ImmutableIntList, org.apache.calcite.util.ImmutableIntList)</code></a> unless you know what you're doing.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>cluster</code> - cluster that join belongs to</dd>
<dd><code>traitSet</code> - Trait set</dd>
<dd><code>left</code> - left join input</dd>
<dd><code>right</code> - right join input</dd>
<dd><code>condition</code> - join condition</dd>
<dd><code>leftKeys</code> - left keys of the semijoin</dd>
<dd><code>rightKeys</code> - right keys of the semijoin</dd>
</dl>
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<h3>Method Detail</h3>
<a id="create(org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rex.RexNode,org.apache.calcite.util.ImmutableIntList,org.apache.calcite.util.ImmutableIntList)">
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<h4>create</h4>
<pre class="methodSignature">public static&nbsp;<a href="SemiJoin.html" title="class in org.apache.calcite.rel.core">SemiJoin</a>&nbsp;create&#8203;(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;left,
<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;right,
<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition,
<a href="../../util/ImmutableIntList.html" title="class in org.apache.calcite.util">ImmutableIntList</a>&nbsp;leftKeys,
<a href="../../util/ImmutableIntList.html" title="class in org.apache.calcite.util">ImmutableIntList</a>&nbsp;rightKeys)</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block">Creates a SemiJoin.</div>
</li>
</ul>
<a id="copy(org.apache.calcite.plan.RelTraitSet,org.apache.calcite.rex.RexNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.core.JoinRelType,boolean)">
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<h4>copy</h4>
<pre class="methodSignature">public&nbsp;<a href="SemiJoin.html" title="class in org.apache.calcite.rel.core">SemiJoin</a>&nbsp;copy&#8203;(<a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a>&nbsp;traitSet,
<a href="../../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition,
<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;left,
<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;right,
<a href="JoinRelType.html" title="enum in org.apache.calcite.rel.core">JoinRelType</a>&nbsp;joinType,
boolean&nbsp;semiJoinDone)</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="Join.html#copy(org.apache.calcite.plan.RelTraitSet,org.apache.calcite.rex.RexNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.core.JoinRelType,boolean)">Join</a></code></span></div>
<div class="block">Creates a copy of this join, overriding condition, system fields and
inputs.
<p>General contract as <a href="../RelNode.html#copy(org.apache.calcite.plan.RelTraitSet,java.util.List)"><code>RelNode.copy(org.apache.calcite.plan.RelTraitSet, java.util.List&lt;org.apache.calcite.rel.RelNode&gt;)</code></a>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="Join.html#copy(org.apache.calcite.plan.RelTraitSet,org.apache.calcite.rex.RexNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.core.JoinRelType,boolean)">copy</a></code>&nbsp;in class&nbsp;<code><a href="Join.html" title="class in org.apache.calcite.rel.core">Join</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>traitSet</code> - Traits</dd>
<dd><code>condition</code> - Condition</dd>
<dd><code>left</code> - Left input</dd>
<dd><code>right</code> - Right input</dd>
<dd><code>joinType</code> - Join type</dd>
<dd><code>semiJoinDone</code> - Whether this join has been translated to a
semi-join</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Copy of this join</dd>
</dl>
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<h4>computeSelfCost</h4>
<pre class="methodSignature">public&nbsp;<a href="../../plan/RelOptCost.html" title="interface in org.apache.calcite.plan">RelOptCost</a>&nbsp;computeSelfCost&#8203;(<a href="../../plan/RelOptPlanner.html" title="interface in org.apache.calcite.plan">RelOptPlanner</a>&nbsp;planner,
<a href="../metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq)</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../RelNode.html#computeSelfCost(org.apache.calcite.plan.RelOptPlanner,org.apache.calcite.rel.metadata.RelMetadataQuery)">RelNode</a></code></span></div>
<div class="block">Returns the cost of this plan (not including children). The base
implementation throws an error; derived classes should override.
<p>NOTE jvs 29-Mar-2006: Don't call this method directly. Instead, use
<a href="../metadata/RelMetadataQuery.html#getNonCumulativeCost(org.apache.calcite.rel.RelNode)"><code>RelMetadataQuery.getNonCumulativeCost(org.apache.calcite.rel.RelNode)</code></a>, which gives plugins a
chance to override the rel's default ideas about cost.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../RelNode.html#computeSelfCost(org.apache.calcite.plan.RelOptPlanner,org.apache.calcite.rel.metadata.RelMetadataQuery)">computeSelfCost</a></code>&nbsp;in interface&nbsp;<code><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="Join.html#computeSelfCost(org.apache.calcite.plan.RelOptPlanner,org.apache.calcite.rel.metadata.RelMetadataQuery)">computeSelfCost</a></code>&nbsp;in class&nbsp;<code><a href="Join.html" title="class in org.apache.calcite.rel.core">Join</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>planner</code> - Planner for cost calculation</dd>
<dd><code>mq</code> - Metadata query</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Cost of this plan (not including children)</dd>
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<h4>estimateRowCount</h4>
<pre class="methodSignature">public&nbsp;double&nbsp;estimateRowCount&#8203;(<a href="../metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq)</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../RelNode.html#estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery)">RelNode</a></code></span></div>
<div class="block">Returns an estimate of the number of rows this relational expression will
return.
<p>NOTE jvs 29-Mar-2006: Don't call this method directly. Instead, use
<a href="../metadata/RelMetadataQuery.html#getRowCount(org.apache.calcite.rel.RelNode)"><code>RelMetadataQuery.getRowCount(org.apache.calcite.rel.RelNode)</code></a>, which gives plugins a chance to
override the rel's default ideas about row count.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../RelNode.html#estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery)">estimateRowCount</a></code>&nbsp;in interface&nbsp;<code><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="Join.html#estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery)">estimateRowCount</a></code>&nbsp;in class&nbsp;<code><a href="Join.html" title="class in org.apache.calcite.rel.core">Join</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>mq</code> - Metadata query</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Estimate of the number of rows this relational expression will
return</dd>
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<h4>deriveRowType</h4>
<pre class="methodSignature">public&nbsp;<a href="../type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;deriveRowType()</pre>
<div class="deprecationBlock"><span class="deprecatedLabel">Deprecated.</span></div>
<div class="block">
<p>In the case of semi-join, the row type consists of columns from left
input only.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="Join.html#deriveRowType()">deriveRowType</a></code>&nbsp;in class&nbsp;<code><a href="Join.html" title="class in org.apache.calcite.rel.core">Join</a></code></dd>
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