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<div class="subTitle">org.apache.calcite.rel.rules</div>
<h2 title="类 MultiJoinProjectTransposeRule" class="title">类 MultiJoinProjectTransposeRule</h2>
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<li><a href="../../../../../org/apache/calcite/plan/RelOptRule.html" title="org.apache.calcite.plan中的类">org.apache.calcite.plan.RelOptRule</a></li>
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<ul class="inheritance">
<li><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">org.apache.calcite.rel.rules.JoinProjectTransposeRule</a></li>
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<ul class="inheritance">
<li>org.apache.calcite.rel.rules.MultiJoinProjectTransposeRule</li>
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<pre>public class <span class="typeNameLabel">MultiJoinProjectTransposeRule</span>
extends <a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">JoinProjectTransposeRule</a></pre>
<div class="block">MultiJoinProjectTransposeRule implements the rule for pulling
<a href="../../../../../org/apache/calcite/rel/logical/LogicalProject.html" title="org.apache.calcite.rel.logical中的类"><code>LogicalProject</code></a>s that are on top of a
<a href="../../../../../org/apache/calcite/rel/rules/MultiJoin.html" title="org.apache.calcite.rel.rules中的类"><code>MultiJoin</code></a> and beneath a
<a href="../../../../../org/apache/calcite/rel/logical/LogicalJoin.html" title="org.apache.calcite.rel.logical中的类"><code>LogicalJoin</code></a> so the
<a href="../../../../../org/apache/calcite/rel/logical/LogicalProject.html" title="org.apache.calcite.rel.logical中的类"><code>LogicalProject</code></a> appears above the
<a href="../../../../../org/apache/calcite/rel/logical/LogicalJoin.html" title="org.apache.calcite.rel.logical中的类"><code>LogicalJoin</code></a>.
<p>In the process of doing
so, also save away information about the respective fields that are
referenced in the expressions in the
<a href="../../../../../org/apache/calcite/rel/logical/LogicalProject.html" title="org.apache.calcite.rel.logical中的类"><code>LogicalProject</code></a> we're pulling up, as
well as the join condition, in the resultant <a href="../../../../../org/apache/calcite/rel/rules/MultiJoin.html" title="org.apache.calcite.rel.rules中的类"><code>MultiJoin</code></a>s
<p>For example, if we have the following sub-query:
<blockquote><pre>
(select X.x1, Y.y1 from X, Y
where X.x2 = Y.y2 and X.x3 = 1 and Y.y3 = 2)</pre></blockquote>
<p>The <a href="../../../../../org/apache/calcite/rel/rules/MultiJoin.html" title="org.apache.calcite.rel.rules中的类"><code>MultiJoin</code></a> associated with (X, Y) associates x1 with X and
y1 with Y. Although x3 and y3 need to be read due to the filters, they are
not required after the row scan has completed and therefore are not saved.
The join fields, x2 and y2, are also tracked separately.
<p>Note that by only pulling up projects that are on top of
<a href="../../../../../org/apache/calcite/rel/rules/MultiJoin.html" title="org.apache.calcite.rel.rules中的类"><code>MultiJoin</code></a>s, we preserve projections on top of row scans.
<p>See the superclass for details on restrictions regarding which
<a href="../../../../../org/apache/calcite/rel/logical/LogicalProject.html" title="org.apache.calcite.rel.logical中的类"><code>LogicalProject</code></a>s cannot be pulled.</div>
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<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>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">MultiJoinProjectTransposeRule</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html#MULTI_BOTH_PROJECT">MULTI_BOTH_PROJECT</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">MultiJoinProjectTransposeRule</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html#MULTI_LEFT_PROJECT">MULTI_LEFT_PROJECT</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">MultiJoinProjectTransposeRule</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html#MULTI_RIGHT_PROJECT">MULTI_RIGHT_PROJECT</a></span></code>&nbsp;</td>
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<h3>从类继承的字段&nbsp;org.apache.calcite.rel.rules.<a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">JoinProjectTransposeRule</a></h3>
<code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#BOTH_PROJECT">BOTH_PROJECT</a>, <a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#BOTH_PROJECT_INCLUDE_OUTER">BOTH_PROJECT_INCLUDE_OUTER</a>, <a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#LEFT_PROJECT">LEFT_PROJECT</a>, <a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#LEFT_PROJECT_INCLUDE_OUTER">LEFT_PROJECT_INCLUDE_OUTER</a>, <a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#RIGHT_PROJECT">RIGHT_PROJECT</a>, <a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#RIGHT_PROJECT_INCLUDE_OUTER">RIGHT_PROJECT_INCLUDE_OUTER</a></code></li>
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<code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#description">description</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operands">operands</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#relBuilderFactory">relBuilderFactory</a></code></li>
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<h3>构造器概要</h3>
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<caption><span>构造器</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colOne" scope="col">构造器和说明</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html#MultiJoinProjectTransposeRule-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.tools.RelBuilderFactory-java.lang.String-">MultiJoinProjectTransposeRule</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptRuleOperand.html" title="org.apache.calcite.plan中的类">RelOptRuleOperand</a>&nbsp;operand,
<a href="../../../../../org/apache/calcite/tools/RelBuilderFactory.html" title="org.apache.calcite.tools中的接口">RelBuilderFactory</a>&nbsp;relBuilderFactory,
<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>&nbsp;description)</code>
<div class="block">Creates a MultiJoinProjectTransposeRule.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html#MultiJoinProjectTransposeRule-org.apache.calcite.plan.RelOptRuleOperand-java.lang.String-">MultiJoinProjectTransposeRule</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptRuleOperand.html" title="org.apache.calcite.plan中的类">RelOptRuleOperand</a>&nbsp;operand,
<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>&nbsp;description)</code>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
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<h3>方法概要</h3>
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<caption><span id="t0" class="activeTableTab"><span>所有方法</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="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</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>
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<td class="colFirst"><code>protected <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/rules/MultiJoinProjectTransposeRule.html#getProjectChild-org.apache.calcite.plan.RelOptRuleCall-org.apache.calcite.rel.core.Project-boolean-">getProjectChild</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="org.apache.calcite.plan中的类">RelOptRuleCall</a>&nbsp;call,
<a href="../../../../../org/apache/calcite/rel/core/Project.html" title="org.apache.calcite.rel.core中的类">Project</a>&nbsp;project,
boolean&nbsp;leftChild)</code>
<div class="block">Returns the child of the project that will be used as input into the new
LogicalJoin once the projects are pulled above the LogicalJoin.</div>
</td>
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<td class="colFirst"><code>protected <a href="../../../../../org/apache/calcite/rel/core/Project.html" title="org.apache.calcite.rel.core中的类">Project</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html#getRightChild-org.apache.calcite.plan.RelOptRuleCall-">getRightChild</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="org.apache.calcite.plan中的类">RelOptRuleCall</a>&nbsp;call)</code>&nbsp;</td>
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<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html#hasLeftChild-org.apache.calcite.plan.RelOptRuleCall-">hasLeftChild</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="org.apache.calcite.plan中的类">RelOptRuleCall</a>&nbsp;call)</code>&nbsp;</td>
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<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html#hasRightChild-org.apache.calcite.plan.RelOptRuleCall-">hasRightChild</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="org.apache.calcite.plan中的类">RelOptRuleCall</a>&nbsp;call)</code>&nbsp;</td>
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<code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#createProjectExprs-org.apache.calcite.rel.core.Project-org.apache.calcite.rel.RelNode-int-org.apache.calcite.rex.RexBuilder-java.util.List-java.util.List-">createProjectExprs</a>, <a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#onMatch-org.apache.calcite.plan.RelOptRuleCall-">onMatch</a></code></li>
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<code><a href="../../../../../org/apache/calcite/plan/RelOptRule.html#any--">any</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convert-org.apache.calcite.rel.RelNode-org.apache.calcite.plan.RelTrait-">convert</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convert-org.apache.calcite.rel.RelNode-org.apache.calcite.plan.RelTraitSet-">convert</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convertList-java.util.List-org.apache.calcite.plan.RelTrait-">convertList</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convertOperand-java.lang.Class-java.util.function.Predicate-org.apache.calcite.plan.RelTrait-">convertOperand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#convertOperand-java.lang.Class-com.google.common.base.Predicate-org.apache.calcite.plan.RelTrait-">convertOperand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#equals-java.lang.Object-">equals</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#equals-org.apache.calcite.plan.RelOptRule-">equals</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOperand--">getOperand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOperands--">getOperands</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOutConvention--">getOutConvention</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#getOutTrait--">getOutTrait</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#hashCode--">hashCode</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#matches-org.apache.calcite.plan.RelOptRuleCall-">matches</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#none--">none</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelOptRuleOperandChildren-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelTrait-com.google.common.base.Predicate-org.apache.calcite.plan.RelOptRuleOperandChildren-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelTrait-com.google.common.base.Predicate-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operand-java.lang.Class-org.apache.calcite.plan.RelTrait-org.apache.calcite.plan.RelOptRuleOperandChildren-">operand</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operandJ-java.lang.Class-org.apache.calcite.plan.RelTrait-java.util.function.Predicate-org.apache.calcite.plan.RelOptRuleOperandChildren-">operandJ</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#operandJ-java.lang.Class-org.apache.calcite.plan.RelTrait-java.util.function.Predicate-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">operandJ</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#some-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">some</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#toString--">toString</a>, <a href="../../../../../org/apache/calcite/plan/RelOptRule.html#unordered-org.apache.calcite.plan.RelOptRuleOperand-org.apache.calcite.plan.RelOptRuleOperand...-">unordered</a></code></li>
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<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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<pre>public static final&nbsp;<a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">MultiJoinProjectTransposeRule</a> MULTI_BOTH_PROJECT</pre>
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<h4>MULTI_LEFT_PROJECT</h4>
<pre>public static final&nbsp;<a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">MultiJoinProjectTransposeRule</a> MULTI_LEFT_PROJECT</pre>
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<pre>public static final&nbsp;<a href="../../../../../org/apache/calcite/rel/rules/MultiJoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">MultiJoinProjectTransposeRule</a> MULTI_RIGHT_PROJECT</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&nbsp;MultiJoinProjectTransposeRule(<a href="../../../../../org/apache/calcite/plan/RelOptRuleOperand.html" title="org.apache.calcite.plan中的类">RelOptRuleOperand</a>&nbsp;operand,
<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>&nbsp;description)</pre>
<div class="block"><span class="deprecatedLabel">已过时。</span>&nbsp;</div>
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<pre>public&nbsp;MultiJoinProjectTransposeRule(<a href="../../../../../org/apache/calcite/plan/RelOptRuleOperand.html" title="org.apache.calcite.plan中的类">RelOptRuleOperand</a>&nbsp;operand,
<a href="../../../../../org/apache/calcite/tools/RelBuilderFactory.html" title="org.apache.calcite.tools中的接口">RelBuilderFactory</a>&nbsp;relBuilderFactory,
<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>&nbsp;description)</pre>
<div class="block">Creates a MultiJoinProjectTransposeRule.</div>
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<pre>protected&nbsp;boolean&nbsp;hasLeftChild(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="org.apache.calcite.plan中的类">RelOptRuleCall</a>&nbsp;call)</pre>
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<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#hasLeftChild-org.apache.calcite.plan.RelOptRuleCall-">hasLeftChild</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">JoinProjectTransposeRule</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>call</code> - RelOptRuleCall</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>true if the rule was invoked with a left project child</dd>
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<pre>protected&nbsp;boolean&nbsp;hasRightChild(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="org.apache.calcite.plan中的类">RelOptRuleCall</a>&nbsp;call)</pre>
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<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#hasRightChild-org.apache.calcite.plan.RelOptRuleCall-">hasRightChild</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">JoinProjectTransposeRule</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>call</code> - RelOptRuleCall</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>true if the rule was invoked with 2 children</dd>
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<pre>protected&nbsp;<a href="../../../../../org/apache/calcite/rel/core/Project.html" title="org.apache.calcite.rel.core中的类">Project</a>&nbsp;getRightChild(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="org.apache.calcite.plan中的类">RelOptRuleCall</a>&nbsp;call)</pre>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#getRightChild-org.apache.calcite.plan.RelOptRuleCall-">getRightChild</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">JoinProjectTransposeRule</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>call</code> - RelOptRuleCall</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>LogicalProject corresponding to the right child</dd>
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<pre>protected&nbsp;<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>&nbsp;getProjectChild(<a href="../../../../../org/apache/calcite/plan/RelOptRuleCall.html" title="org.apache.calcite.plan中的类">RelOptRuleCall</a>&nbsp;call,
<a href="../../../../../org/apache/calcite/rel/core/Project.html" title="org.apache.calcite.rel.core中的类">Project</a>&nbsp;project,
boolean&nbsp;leftChild)</pre>
<div class="block"><span class="descfrmTypeLabel">从类复制的说明:&nbsp;<code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#getProjectChild-org.apache.calcite.plan.RelOptRuleCall-org.apache.calcite.rel.core.Project-boolean-">JoinProjectTransposeRule</a></code></span></div>
<div class="block">Returns the child of the project that will be used as input into the new
LogicalJoin once the projects are pulled above the LogicalJoin.</div>
<dl>
<dt><span class="overrideSpecifyLabel">覆盖:</span></dt>
<dd><code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html#getProjectChild-org.apache.calcite.plan.RelOptRuleCall-org.apache.calcite.rel.core.Project-boolean-">getProjectChild</a></code>&nbsp;在类中&nbsp;<code><a href="../../../../../org/apache/calcite/rel/rules/JoinProjectTransposeRule.html" title="org.apache.calcite.rel.rules中的类">JoinProjectTransposeRule</a></code></dd>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>call</code> - RelOptRuleCall</dd>
<dd><code>project</code> - project RelNode</dd>
<dd><code>leftChild</code> - true if the project corresponds to the left projection</dd>
<dt><span class="returnLabel">返回:</span></dt>
<dd>child of the project that will be used as input into the new
LogicalJoin once the projects are pulled above the LogicalJoin</dd>
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