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<div class="subTitle">org.apache.calcite.rel.core</div>
<h2 title="类 Join" class="title">类 Join</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">java.lang.Object</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">org.apache.calcite.rel.AbstractRelNode</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../org/apache/calcite/rel/BiRel.html" title="org.apache.calcite.rel中的类">org.apache.calcite.rel.BiRel</a></li>
<li>
<ul class="inheritance">
<li>org.apache.calcite.rel.core.Join</li>
</ul>
</li>
</ul>
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</ul>
<div class="description">
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<dl>
<dt>所有已实现的接口:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html?is-external=true" title="java.lang中的类或接口">Cloneable</a>, <a href="../../../../../org/apache/calcite/plan/RelOptNode.html" title="org.apache.calcite.plan中的接口">RelOptNode</a>, <a href="../../../../../org/apache/calcite/rel/hint/Hintable.html" title="org.apache.calcite.rel.hint中的接口">Hintable</a>, <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></dd>
</dl>
<dl>
<dt>直接已知子类:</dt>
<dd><a href="../../../../../org/apache/calcite/interpreter/Bindables.BindableJoin.html" title="org.apache.calcite.interpreter中的类">Bindables.BindableJoin</a>, <a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableBatchNestedLoopJoin.html" title="org.apache.calcite.adapter.enumerable中的类">EnumerableBatchNestedLoopJoin</a>, <a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableHashJoin.html" title="org.apache.calcite.adapter.enumerable中的类">EnumerableHashJoin</a>, <a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableMergeJoin.html" title="org.apache.calcite.adapter.enumerable中的类">EnumerableMergeJoin</a>, <a href="../../../../../org/apache/calcite/adapter/enumerable/EnumerableNestedLoopJoin.html" title="org.apache.calcite.adapter.enumerable中的类">EnumerableNestedLoopJoin</a>, <a href="../../../../../org/apache/calcite/rel/core/EquiJoin.html" title="org.apache.calcite.rel.core中的类">EquiJoin</a>, <a href="../../../../../org/apache/calcite/adapter/jdbc/JdbcRules.JdbcJoin.html" title="org.apache.calcite.adapter.jdbc中的类">JdbcRules.JdbcJoin</a>, <a href="../../../../../org/apache/calcite/rel/logical/LogicalJoin.html" title="org.apache.calcite.rel.logical中的类">LogicalJoin</a>, <a href="../../../../../org/apache/calcite/adapter/pig/PigJoin.html" title="org.apache.calcite.adapter.pig中的类">PigJoin</a></dd>
</dl>
<hr>
<br>
<pre>public abstract class <span class="typeNameLabel">Join</span>
extends <a href="../../../../../org/apache/calcite/rel/BiRel.html" title="org.apache.calcite.rel中的类">BiRel</a>
implements <a href="../../../../../org/apache/calcite/rel/hint/Hintable.html" title="org.apache.calcite.rel.hint中的接口">Hintable</a></pre>
<div class="block">Relational expression that combines two relational expressions according to
some condition.
<p>Each output row has columns from the left and right inputs.
The set of output rows is a subset of the cartesian product of the two
inputs; precisely which subset depends on the join condition.</div>
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<h3>嵌套类概要</h3>
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<h3>从接口继承的嵌套类/接口&nbsp;org.apache.calcite.rel.<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></h3>
<code><a href="../../../../../org/apache/calcite/rel/RelNode.Context.html" title="org.apache.calcite.rel中的接口">RelNode.Context</a></code></li>
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<h3>字段概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="字段概要表, 列表字段和解释">
<caption><span>字段</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">限定符和类型</th>
<th class="colLast" scope="col">字段和说明</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#condition">condition</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected com.google.common.collect.ImmutableList&lt;<a href="../../../../../org/apache/calcite/rel/hint/RelHint.html" title="org.apache.calcite.rel.hint中的类">RelHint</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#hints">hints</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="../../../../../org/apache/calcite/rel/core/JoinInfo.html" title="org.apache.calcite.rel.core中的类">JoinInfo</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#joinInfo">joinInfo</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#joinType">joinType</a></span></code>
<div class="block">Values must be of enumeration <a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举"><code>JoinRelType</code></a>, except that
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html#RIGHT"><code>JoinRelType.RIGHT</code></a> is disallowed.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected com.google.common.collect.ImmutableSet&lt;<a href="../../../../../org/apache/calcite/rel/core/CorrelationId.html" title="org.apache.calcite.rel.core中的类">CorrelationId</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#variablesSet">variablesSet</a></span></code>&nbsp;</td>
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<h3>从类继承的字段&nbsp;org.apache.calcite.rel.<a href="../../../../../org/apache/calcite/rel/BiRel.html" title="org.apache.calcite.rel中的类">BiRel</a></h3>
<code><a href="../../../../../org/apache/calcite/rel/BiRel.html#left">left</a>, <a href="../../../../../org/apache/calcite/rel/BiRel.html#right">right</a></code></li>
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<h3>从类继承的字段&nbsp;org.apache.calcite.rel.<a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></h3>
<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#digest">digest</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#id">id</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#rowType">rowType</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#traitSet">traitSet</a></code></li>
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<h3>构造器概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="构造器概要表, 列表构造器和解释">
<caption><span>构造器</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">限定符</th>
<th class="colLast" scope="col">构造器和说明</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#Join-org.apache.calcite.plan.RelOptCluster-org.apache.calcite.plan.RelTraitSet-java.util.List-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.RelNode-org.apache.calcite.rex.RexNode-java.util.Set-org.apache.calcite.rel.core.JoinRelType-">Join</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptCluster.html" title="org.apache.calcite.plan中的类">RelOptCluster</a>&nbsp;cluster,
<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;traitSet,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rel/hint/RelHint.html" title="org.apache.calcite.rel.hint中的类">RelHint</a>&gt;&nbsp;hints,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;left,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;right,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;condition,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a>&lt;<a href="../../../../../org/apache/calcite/rel/core/CorrelationId.html" title="org.apache.calcite.rel.core中的类">CorrelationId</a>&gt;&nbsp;variablesSet,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;joinType)</code>
<div class="block">Creates a Join.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#Join-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.rel.core.JoinRelType-java.util.Set-">Join</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptCluster.html" title="org.apache.calcite.plan中的类">RelOptCluster</a>&nbsp;cluster,
<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;traitSet,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;left,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;right,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;condition,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;joinType,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&gt;&nbsp;variablesStopped)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#Join-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-java.util.Set-org.apache.calcite.rel.core.JoinRelType-">Join</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptCluster.html" title="org.apache.calcite.plan中的类">RelOptCluster</a>&nbsp;cluster,
<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;traitSet,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;left,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;right,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;condition,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a>&lt;<a href="../../../../../org/apache/calcite/rel/core/CorrelationId.html" title="org.apache.calcite.rel.core中的类">CorrelationId</a>&gt;&nbsp;variablesSet,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;joinType)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
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<h3>方法概要</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释">
<caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">静态方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">抽象方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">已过时的方法</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">限定符和类型</th>
<th class="colLast" scope="col">方法和说明</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#accept-org.apache.calcite.rex.RexShuttle-">accept</a></span>(<a href="../../../../../org/apache/calcite/rex/RexShuttle.html" title="org.apache.calcite.rex中的类">RexShuttle</a>&nbsp;shuttle)</code>
<div class="block">Accepts a visit from a shuttle.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/core/JoinInfo.html" title="org.apache.calcite.rel.core中的类">JoinInfo</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#analyzeCondition--">analyzeCondition</a></span>()</code>
<div class="block">Analyzes the join condition.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#computeSelfCost-org.apache.calcite.plan.RelOptPlanner-org.apache.calcite.rel.metadata.RelMetadataQuery-">computeSelfCost</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptPlanner.html" title="org.apache.calcite.plan中的接口">RelOptPlanner</a>&nbsp;planner,
<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="org.apache.calcite.rel.metadata中的类">RelMetadataQuery</a>&nbsp;mq)</code>
<div class="block">Returns the cost of this plan (not including children).</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/core/Join.html" title="org.apache.calcite.rel.core中的类">Join</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#copy-org.apache.calcite.plan.RelTraitSet-java.util.List-">copy</a></span>(<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;traitSet,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&gt;&nbsp;inputs)</code>
<div class="block">Creates a copy of this relational expression, perhaps changing traits and
inputs.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>abstract <a href="../../../../../org/apache/calcite/rel/core/Join.html" title="org.apache.calcite.rel.core中的类">Join</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/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></span>(<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;traitSet,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;conditionExpr,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;left,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;right,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;joinType,
boolean&nbsp;semiJoinDone)</code>
<div class="block">Creates a copy of this join, overriding condition, system fields and
inputs.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/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></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a>&nbsp;typeFactory,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;leftType,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;rightType,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&gt;&nbsp;fieldNameList,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeField.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeField</a>&gt;&nbsp;systemFieldList)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/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></span>(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;leftType,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;rightType,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;joinType,
<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a>&nbsp;typeFactory,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&gt;&nbsp;fieldNameList,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeField.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeField</a>&gt;&nbsp;systemFieldList)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>protected <a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#deriveRowType--">deriveRowType</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#estimateJoinedRows-org.apache.calcite.rel.core.Join-org.apache.calcite.rex.RexNode-">estimateJoinedRows</a></span>(<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="org.apache.calcite.rel.core中的类">Join</a>&nbsp;joinRel,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;condition)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;
<div class="block"><span class="deprecationComment">Use <a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#getJoinRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.core.Join-org.apache.calcite.rex.RexNode-"><code>RelMdUtil.getJoinRowCount(RelMetadataQuery, Join, RexNode)</code></a>.</span></div>
</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#estimateRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-">estimateRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="org.apache.calcite.rel.metadata中的类">RelMetadataQuery</a>&nbsp;mq)</code>
<div class="block">Returns an estimate of the number of rows this relational expression will
return.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/RelWriter.html" title="org.apache.calcite.rel中的接口">RelWriter</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#explainTerms-org.apache.calcite.rel.RelWriter-">explainTerms</a></span>(<a href="../../../../../org/apache/calcite/rel/RelWriter.html" title="org.apache.calcite.rel中的接口">RelWriter</a>&nbsp;pw)</code>
<div class="block">Describes the inputs and attributes of this relational expression.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#getChildExps--">getChildExps</a></span>()</code>
<div class="block">Returns a list of this relational expression's child expressions.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#getCondition--">getCondition</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>com.google.common.collect.ImmutableList&lt;<a href="../../../../../org/apache/calcite/rel/hint/RelHint.html" title="org.apache.calcite.rel.hint中的类">RelHint</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#getHints--">getHints</a></span>()</code>
<div class="block">Returns the hints of this relational expressions as an immutable list.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#getJoinType--">getJoinType</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeField.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeField</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#getSystemFieldList--">getSystemFieldList</a></span>()</code>
<div class="block">Returns a list of system fields that will be prefixed to
output row type.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a>&lt;<a href="../../../../../org/apache/calcite/rel/core/CorrelationId.html" title="org.apache.calcite.rel.core中的类">CorrelationId</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#getVariablesSet--">getVariablesSet</a></span>()</code>
<div class="block">Returns the variables that are set in this relational
expression but also used and therefore not available to parents of this
relational expression.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#isSemiJoin--">isSemiJoin</a></span>()</code>
<div class="block">Returns whether this Join is a semijoin.</div>
</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#isSemiJoinDone--">isSemiJoinDone</a></span>()</code>
<div class="block">Returns whether this LogicalJoin has already spawned a
<code>SemiJoin</code> via
<a href="../../../../../org/apache/calcite/rel/rules/JoinAddRedundantSemiJoinRule.html" title="org.apache.calcite.rel.rules中的类"><code>JoinAddRedundantSemiJoinRule</code></a>.</div>
</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/core/Join.html#isValid-org.apache.calcite.util.Litmus-org.apache.calcite.rel.RelNode.Context-">isValid</a></span>(<a href="../../../../../org/apache/calcite/util/Litmus.html" title="org.apache.calcite.util中的接口">Litmus</a>&nbsp;litmus,
<a href="../../../../../org/apache/calcite/rel/RelNode.Context.html" title="org.apache.calcite.rel中的接口">RelNode.Context</a>&nbsp;context)</code>
<div class="block">Returns whether this relational expression is valid.</div>
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<h3>从类继承的方法&nbsp;org.apache.calcite.rel.<a href="../../../../../org/apache/calcite/rel/BiRel.html" title="org.apache.calcite.rel中的类">BiRel</a></h3>
<code><a href="../../../../../org/apache/calcite/rel/BiRel.html#childrenAccept-org.apache.calcite.rel.RelVisitor-">childrenAccept</a>, <a href="../../../../../org/apache/calcite/rel/BiRel.html#getInputs--">getInputs</a>, <a href="../../../../../org/apache/calcite/rel/BiRel.html#getLeft--">getLeft</a>, <a href="../../../../../org/apache/calcite/rel/BiRel.html#getRight--">getRight</a>, <a href="../../../../../org/apache/calcite/rel/BiRel.html#replaceInput-int-org.apache.calcite.rel.RelNode-">replaceInput</a></code></li>
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<h3>从类继承的方法&nbsp;org.apache.calcite.rel.<a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></h3>
<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#accept-org.apache.calcite.rel.RelShuttle-">accept</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#collectVariablesSet-java.util.Set-">collectVariablesSet</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#collectVariablesUsed-java.util.Set-">collectVariablesUsed</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#computeDigest--">computeDigest</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#computeSelfCost-org.apache.calcite.plan.RelOptPlanner-">computeSelfCost</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#equals-java.lang.Object-">equals</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#explain-org.apache.calcite.rel.RelWriter-">explain</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getCluster--">getCluster</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getCollationList--">getCollationList</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getConvention--">getConvention</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getCorrelVariable--">getCorrelVariable</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getDescription--">getDescription</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getDigest--">getDigest</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getExpectedInputRowType-int-">getExpectedInputRowType</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getId--">getId</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getInput-int-">getInput</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getQuery--">getQuery</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getRelTypeName--">getRelTypeName</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getRows--">getRows</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getRowType--">getRowType</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getTable--">getTable</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getTraitSet--">getTraitSet</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getVariablesStopped--">getVariablesStopped</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#hashCode--">hashCode</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#isDistinct--">isDistinct</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#isKey-org.apache.calcite.util.ImmutableBitSet-">isKey</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#isValid-boolean-">isValid</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#metadata-java.lang.Class-org.apache.calcite.rel.metadata.RelMetadataQuery-">metadata</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#onRegister-org.apache.calcite.plan.RelOptPlanner-">onRegister</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#recomputeDigest--">recomputeDigest</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#register-org.apache.calcite.plan.RelOptPlanner-">register</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#sole-java.util.List-">sole</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#toString--">toString</a></code></li>
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<h3>从类继承的方法&nbsp;java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li>
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<h3>从接口继承的方法&nbsp;org.apache.calcite.rel.hint.<a href="../../../../../org/apache/calcite/rel/hint/Hintable.html" title="org.apache.calcite.rel.hint中的接口">Hintable</a></h3>
<code><a href="../../../../../org/apache/calcite/rel/hint/Hintable.html#attachHints-java.util.List-">attachHints</a>, <a href="../../../../../org/apache/calcite/rel/hint/Hintable.html#withHints-java.util.List-">withHints</a></code></li>
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<h3>字段详细资料</h3>
<a name="condition">
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<h4>condition</h4>
<pre>protected final&nbsp;<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> condition</pre>
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<a name="variablesSet">
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<h4>variablesSet</h4>
<pre>protected final&nbsp;com.google.common.collect.ImmutableSet&lt;<a href="../../../../../org/apache/calcite/rel/core/CorrelationId.html" title="org.apache.calcite.rel.core中的类">CorrelationId</a>&gt; variablesSet</pre>
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<h4>hints</h4>
<pre>protected final&nbsp;com.google.common.collect.ImmutableList&lt;<a href="../../../../../org/apache/calcite/rel/hint/RelHint.html" title="org.apache.calcite.rel.hint中的类">RelHint</a>&gt; hints</pre>
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<pre>protected final&nbsp;<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a> joinType</pre>
<div class="block">Values must be of enumeration <a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举"><code>JoinRelType</code></a>, except that
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html#RIGHT"><code>JoinRelType.RIGHT</code></a> is disallowed.</div>
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<h4>joinInfo</h4>
<pre>protected final&nbsp;<a href="../../../../../org/apache/calcite/rel/core/JoinInfo.html" title="org.apache.calcite.rel.core中的类">JoinInfo</a> joinInfo</pre>
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<h3>构造器详细资料</h3>
<a name="Join-org.apache.calcite.plan.RelOptCluster-org.apache.calcite.plan.RelTraitSet-java.util.List-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.RelNode-org.apache.calcite.rex.RexNode-java.util.Set-org.apache.calcite.rel.core.JoinRelType-">
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<h4>Join</h4>
<pre>protected&nbsp;Join(<a href="../../../../../org/apache/calcite/plan/RelOptCluster.html" title="org.apache.calcite.plan中的类">RelOptCluster</a>&nbsp;cluster,
<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;traitSet,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rel/hint/RelHint.html" title="org.apache.calcite.rel.hint中的类">RelHint</a>&gt;&nbsp;hints,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;left,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;right,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;condition,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a>&lt;<a href="../../../../../org/apache/calcite/rel/core/CorrelationId.html" title="org.apache.calcite.rel.core中的类">CorrelationId</a>&gt;&nbsp;variablesSet,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;joinType)</pre>
<div class="block">Creates a Join.
<p>Note: We plan to change the <code>variablesStopped</code> parameter to
<code>Set&amp;lt;CorrelationId&amp;gt; variablesSet</code>
<a href="../../../../../org/apache/calcite/util/Bug.html#upgrade-java.lang.String-"><code>before version 2.0</code></a>,
because <a href="../../../../../org/apache/calcite/rel/core/Join.html#getVariablesSet--"><code>getVariablesSet()</code></a>
is preferred over <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getVariablesStopped--"><code>AbstractRelNode.getVariablesStopped()</code></a>.
This constructor is not deprecated, for now, because maintaining overloaded
constructors in multiple sub-classes would be onerous.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>cluster</code> - Cluster</dd>
<dd><code>traitSet</code> - Trait set</dd>
<dd><code>hints</code> - Hints</dd>
<dd><code>left</code> - Left input</dd>
<dd><code>right</code> - Right input</dd>
<dd><code>condition</code> - Join condition</dd>
<dd><code>joinType</code> - Join type</dd>
<dd><code>variablesSet</code> - Set variables that are set by the
LHS and used by the RHS and are not available to
nodes above this Join in the tree</dd>
</dl>
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protected&nbsp;Join(<a href="../../../../../org/apache/calcite/plan/RelOptCluster.html" title="org.apache.calcite.plan中的类">RelOptCluster</a>&nbsp;cluster,
<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;traitSet,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;left,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;right,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;condition,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a>&lt;<a href="../../../../../org/apache/calcite/rel/core/CorrelationId.html" title="org.apache.calcite.rel.core中的类">CorrelationId</a>&gt;&nbsp;variablesSet,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;joinType)</pre>
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protected&nbsp;Join(<a href="../../../../../org/apache/calcite/plan/RelOptCluster.html" title="org.apache.calcite.plan中的类">RelOptCluster</a>&nbsp;cluster,
<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;traitSet,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;left,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;right,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;condition,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;joinType,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&gt;&nbsp;variablesStopped)</pre>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&gt;&nbsp;getChildExps()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/RelNode.html#getChildExps--">RelNode</a></code></span></div>
<div class="block">Returns a list of this relational expression's child expressions.
(These are scalar expressions, and so do not include the relational
inputs that are returned by <a href="../../../../../org/apache/calcite/rel/RelNode.html#getInputs--"><code>RelNode.getInputs()</code></a>.
<p>The caller should treat the list as unmodifiable; typical
implementations will return an immutable list. If there are no
child expressions, returns an empty list, not <code>null</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#getChildExps--">getChildExps</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getChildExps--">getChildExps</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>List of this relational expression's child expressions</dd>
<dt><span class="seeLabel">另请参阅:</span></dt>
<dd><a href="../../../../../org/apache/calcite/rel/RelNode.html#accept-org.apache.calcite.rex.RexShuttle-"><code>RelNode.accept(org.apache.calcite.rex.RexShuttle)</code></a></dd>
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<pre>public&nbsp;<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;accept(<a href="../../../../../org/apache/calcite/rex/RexShuttle.html" title="org.apache.calcite.rex中的类">RexShuttle</a>&nbsp;shuttle)</pre>
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<div class="block">Accepts a visit from a shuttle. If the shuttle updates expression, then
a copy of the relation should be created. This new relation might have
a different row-type.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#accept-org.apache.calcite.rex.RexShuttle-">accept</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#accept-org.apache.calcite.rex.RexShuttle-">accept</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>shuttle</code> - Shuttle</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>A copy of this node incorporating changes made by the shuttle to
this node's children</dd>
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<pre>public&nbsp;<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;getCondition()</pre>
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<pre>public&nbsp;<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;getJoinType()</pre>
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<pre>public&nbsp;boolean&nbsp;isValid(<a href="../../../../../org/apache/calcite/util/Litmus.html" title="org.apache.calcite.util中的接口">Litmus</a>&nbsp;litmus,
<a href="../../../../../org/apache/calcite/rel/RelNode.Context.html" title="org.apache.calcite.rel中的接口">RelNode.Context</a>&nbsp;context)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/RelNode.html#isValid-org.apache.calcite.util.Litmus-org.apache.calcite.rel.RelNode.Context-">RelNode</a></code></span></div>
<div class="block">Returns whether this relational expression is valid.
<p>If assertions are enabled, this method is typically called with <code>
litmus</code> = <code>THROW</code>, as follows:
<blockquote>
<pre>assert rel.isValid(Litmus.THROW)</pre>
</blockquote>
<p>This signals that the method can throw an <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AssertionError.html?is-external=true" title="java.lang中的类或接口"><code>AssertionError</code></a> if it
is not valid.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#isValid-org.apache.calcite.util.Litmus-org.apache.calcite.rel.RelNode.Context-">isValid</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#isValid-org.apache.calcite.util.Litmus-org.apache.calcite.rel.RelNode.Context-">isValid</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>litmus</code> - What to do if invalid</dd>
<dd><code>context</code> - Context for validity checking</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Whether relational expression is valid</dd>
</dl>
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<pre>public&nbsp;<a href="../../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a>&nbsp;computeSelfCost(<a href="../../../../../org/apache/calcite/plan/RelOptPlanner.html" title="org.apache.calcite.plan中的接口">RelOptPlanner</a>&nbsp;planner,
<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="org.apache.calcite.rel.metadata中的类">RelMetadataQuery</a>&nbsp;mq)</pre>
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<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="../../../../../org/apache/calcite/rel/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>
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<dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#computeSelfCost-org.apache.calcite.plan.RelOptPlanner-org.apache.calcite.rel.metadata.RelMetadataQuery-">computeSelfCost</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#computeSelfCost-org.apache.calcite.plan.RelOptPlanner-org.apache.calcite.rel.metadata.RelMetadataQuery-">computeSelfCost</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>planner</code> - Planner for cost calculation</dd>
<dd><code>mq</code> - Metadata query</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Cost of this plan (not including children)</dd>
</dl>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a>
public static&nbsp;double&nbsp;estimateJoinedRows(<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="org.apache.calcite.rel.core中的类">Join</a>&nbsp;joinRel,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;condition)</pre>
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<pre>public&nbsp;double&nbsp;estimateRowCount(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="org.apache.calcite.rel.metadata中的类">RelMetadataQuery</a>&nbsp;mq)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/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="../../../../../org/apache/calcite/rel/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">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#estimateRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-">estimateRowCount</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#estimateRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-">estimateRowCount</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>mq</code> - Metadata query</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Estimate of the number of rows this relational expression will
return</dd>
</dl>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a>&lt;<a href="../../../../../org/apache/calcite/rel/core/CorrelationId.html" title="org.apache.calcite.rel.core中的类">CorrelationId</a>&gt;&nbsp;getVariablesSet()</pre>
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<div class="block">Returns the variables that are set in this relational
expression but also used and therefore not available to parents of this
relational expression.
<p>Note: only <a href="../../../../../org/apache/calcite/rel/core/Correlate.html" title="org.apache.calcite.rel.core中的类"><code>Correlate</code></a> should set
variables.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#getVariablesSet--">getVariablesSet</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getVariablesSet--">getVariablesSet</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></code></dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Names of variables which are set in this relational
expression</dd>
</dl>
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<pre>public&nbsp;<a href="../../../../../org/apache/calcite/rel/RelWriter.html" title="org.apache.calcite.rel中的接口">RelWriter</a>&nbsp;explainTerms(<a href="../../../../../org/apache/calcite/rel/RelWriter.html" title="org.apache.calcite.rel中的接口">RelWriter</a>&nbsp;pw)</pre>
<div class="block"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#explainTerms-org.apache.calcite.rel.RelWriter-">AbstractRelNode</a></code></span></div>
<div class="block">Describes the inputs and attributes of this relational expression.
Each node should call <code>super.explainTerms</code>, then call the
<a href="../../../../../org/apache/calcite/rel/RelWriter.html#input-java.lang.String-org.apache.calcite.rel.RelNode-"><code>RelWriter.input(String, RelNode)</code></a>
and
<a href="../../../../../org/apache/calcite/rel/externalize/RelWriterImpl.html#item-java.lang.String-java.lang.Object-"><code>RelWriterImpl.item(String, Object)</code></a>
methods for each input and attribute.</div>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/BiRel.html#explainTerms-org.apache.calcite.rel.RelWriter-">explainTerms</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/BiRel.html" title="org.apache.calcite.rel中的类">BiRel</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>pw</code> - Plan writer</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Plan writer for fluent-explain pattern</dd>
</dl>
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<pre>protected&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;deriveRowType()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#deriveRowType--">deriveRowType</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></code></dd>
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<pre>public&nbsp;boolean&nbsp;isSemiJoinDone()</pre>
<div class="block">Returns whether this LogicalJoin has already spawned a
<code>SemiJoin</code> via
<a href="../../../../../org/apache/calcite/rel/rules/JoinAddRedundantSemiJoinRule.html" title="org.apache.calcite.rel.rules中的类"><code>JoinAddRedundantSemiJoinRule</code></a>.
<p>The base implementation returns false.</p></div>
<dl>
<dt><span class="returnLabel">返回:</span></dt>
<dd>whether this join has already spawned a semi join</dd>
</dl>
</li>
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<pre>public&nbsp;boolean&nbsp;isSemiJoin()</pre>
<div class="block">Returns whether this Join is a semijoin.</div>
<dl>
<dt><span class="returnLabel">返回:</span></dt>
<dd>true if this Join's join type is semi.</dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeField.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeField</a>&gt;&nbsp;getSystemFieldList()</pre>
<div class="block">Returns a list of system fields that will be prefixed to
output row type.</div>
<dl>
<dt><span class="returnLabel">返回:</span></dt>
<dd>list of system fields</dd>
</dl>
</li>
</ul>
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public static&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;deriveJoinRowType(<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;leftType,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;rightType,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;joinType,
<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a>&nbsp;typeFactory,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&gt;&nbsp;fieldNameList,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeField.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeField</a>&gt;&nbsp;systemFieldList)</pre>
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<pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="java.lang中的类或接口">@Deprecated</a>
public static&nbsp;<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;createJoinType(<a href="../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a>&nbsp;typeFactory,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;leftType,
<a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;rightType,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&gt;&nbsp;fieldNameList,
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<pre>public final&nbsp;<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="org.apache.calcite.rel.core中的类">Join</a>&nbsp;copy(<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;traitSet,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a>&lt;<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&gt;&nbsp;inputs)</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/RelNode.html#copy-org.apache.calcite.plan.RelTraitSet-java.util.List-">RelNode</a></code></span></div>
<div class="block">Creates a copy of this relational expression, perhaps changing traits and
inputs.
<p>Sub-classes with other important attributes are encouraged to create
variants of this method with more parameters.</p></div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#copy-org.apache.calcite.plan.RelTraitSet-java.util.List-">copy</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a></code></dd>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#copy-org.apache.calcite.plan.RelTraitSet-java.util.List-">copy</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="org.apache.calcite.rel中的类">AbstractRelNode</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>traitSet</code> - Trait set</dd>
<dd><code>inputs</code> - Inputs</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Copy of this relational expression, substituting traits and
inputs</dd>
</dl>
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<pre>public abstract&nbsp;<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="org.apache.calcite.rel.core中的类">Join</a>&nbsp;copy(<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="org.apache.calcite.plan中的类">RelTraitSet</a>&nbsp;traitSet,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>&nbsp;conditionExpr,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;left,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;right,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="org.apache.calcite.rel.core中的枚举">JoinRelType</a>&nbsp;joinType,
boolean&nbsp;semiJoinDone)</pre>
<div class="block">Creates a copy of this join, overriding condition, system fields and
inputs.
<p>General contract as <a href="../../../../../org/apache/calcite/rel/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="paramLabel">参数:</span></dt>
<dd><code>traitSet</code> - Traits</dd>
<dd><code>conditionExpr</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">返回:</span></dt>
<dd>Copy of this join</dd>
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<pre>public&nbsp;<a href="../../../../../org/apache/calcite/rel/core/JoinInfo.html" title="org.apache.calcite.rel.core中的类">JoinInfo</a>&nbsp;analyzeCondition()</pre>
<div class="block">Analyzes the join condition.</div>
<dl>
<dt><span class="returnLabel">返回:</span></dt>
<dd>Analyzed join condition</dd>
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<h4>getHints</h4>
<pre>public&nbsp;com.google.common.collect.ImmutableList&lt;<a href="../../../../../org/apache/calcite/rel/hint/RelHint.html" title="org.apache.calcite.rel.hint中的类">RelHint</a>&gt;&nbsp;getHints()</pre>
<div class="block"><span class="descfrmTypeLabel">从接口复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/hint/Hintable.html#getHints--">Hintable</a></code></span></div>
<div class="block">Returns the hints of this relational expressions as an immutable list.</div>
<dl>
<dt><span class="overrideSpecifyLabel">指定者:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/hint/Hintable.html#getHints--">getHints</a></code>&nbsp;在接口中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/hint/Hintable.html" title="org.apache.calcite.rel.hint中的接口">Hintable</a></code></dd>
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