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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.rel.mutable</a></div>
<h2 title="Class MutableRel" class="title">Class MutableRel</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>org.apache.calcite.rel.mutable.MutableRel</li>
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<dt>Direct Known Subclasses:</dt>
<dd><code><a href="MutableBiRel.html" title="class in org.apache.calcite.rel.mutable">MutableBiRel</a></code>, <code><a href="MutableLeafRel.html" title="class in org.apache.calcite.rel.mutable">MutableLeafRel</a></code>, <code><a href="MutableMultiRel.html" title="class in org.apache.calcite.rel.mutable">MutableMultiRel</a></code>, <code><a href="MutableSingleRel.html" title="class in org.apache.calcite.rel.mutable">MutableSingleRel</a></code></dd>
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<pre>public abstract class <span class="typeNameLabel">MutableRel</span>
extends java.lang.Object</pre>
<div class="block">Mutable equivalent of <a href="../RelNode.html" title="interface in org.apache.calcite.rel"><code>RelNode</code></a>.
<p>Each node has mutable state, and keeps track of its parent and position
within parent.
It doesn't make sense to canonize <code>MutableRels</code>,
otherwise one node could end up with multiple parents.
It follows that <code>#hashCode</code> and <code>#equals</code> are less efficient
than their <code>RelNode</code> counterparts.
But, you don't need to copy a <code>MutableRel</code> in order to change it.
For this reason, you should use <code>MutableRel</code> for short-lived
operations, and transcribe back to <code>RelNode</code> when you are done.</p></div>
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<td class="colFirst"><code>private class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="MutableRel.MutableRelDumper.html" title="class in org.apache.calcite.rel.mutable">MutableRel.MutableRelDumper</a></span></code></th>
<td class="colLast">
<div class="block">Implementation of MutableVisitor that dumps the details
of a MutableRel tree.</div>
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<td class="colFirst"><code><a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#cluster">cluster</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>protected int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#ordinalInParent">ordinalInParent</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>protected static com.google.common.base.Equivalence&lt;java.util.List&lt;?&gt;&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#PAIRWISE_STRING_EQUIVALENCE">PAIRWISE_STRING_EQUIVALENCE</a></span></code></th>
<td class="colLast">
<div class="block">Equivalence that compares <code>Lists</code>s by the
<code>Object.toString()</code> of their elements.</div>
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<td class="colFirst"><code>protected <a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#parent">parent</a></span></code></th>
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<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="#rowType">rowType</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected static com.google.common.base.Equivalence&lt;java.lang.Object&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#STRING_EQUIVALENCE">STRING_EQUIVALENCE</a></span></code></th>
<td class="colLast">
<div class="block">Equivalence that compares objects by their <code>Object.toString()</code>
method.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>protected <a href="MutableRelType.html" title="enum in org.apache.calcite.rel.mutable">MutableRelType</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#type">type</a></span></code></th>
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<td class="colFirst"><code>protected </code></td>
<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.plan.RelOptCluster,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.mutable.MutableRelType)">MutableRel</a></span>&#8203;(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;cluster,
<a href="../type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;rowType,
<a href="MutableRelType.html" title="enum in org.apache.calcite.rel.mutable">MutableRelType</a>&nbsp;type)</code></th>
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<td class="colFirst"><code>abstract void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#childrenAccept(org.apache.calcite.rel.mutable.MutableRelVisitor)">childrenAccept</a></span>&#8203;(<a href="MutableRelVisitor.html" title="class in org.apache.calcite.rel.mutable">MutableRelVisitor</a>&nbsp;visitor)</code></th>
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<td class="colFirst"><code>abstract <a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#clone()">clone</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#deep()">deep</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<td class="colFirst"><code>abstract java.lang.StringBuilder</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#digest(java.lang.StringBuilder)">digest</a></span>&#8203;(java.lang.StringBuilder&nbsp;buf)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>abstract java.util.List&lt;<a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a>&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getInputs()">getInputs</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getParent()">getParent</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#replaceInParent(org.apache.calcite.rel.mutable.MutableRel)">replaceInParent</a></span>&#8203;(<a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a>&nbsp;child)</code></th>
<td class="colLast">
<div class="block">Replaces this <code>MutableRel</code> in its parent with another node at the
same position.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>abstract void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setInput(int,org.apache.calcite.rel.mutable.MutableRel)">setInput</a></span>&#8203;(int&nbsp;ordinalInParent,
<a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a>&nbsp;input)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#toString()">toString</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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<h4>STRING_EQUIVALENCE</h4>
<pre>protected static final&nbsp;com.google.common.base.Equivalence&lt;java.lang.Object&gt; STRING_EQUIVALENCE</pre>
<div class="block">Equivalence that compares objects by their <code>Object.toString()</code>
method.</div>
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<a id="PAIRWISE_STRING_EQUIVALENCE">
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<h4>PAIRWISE_STRING_EQUIVALENCE</h4>
<pre>protected static final&nbsp;com.google.common.base.Equivalence&lt;java.util.List&lt;?&gt;&gt; PAIRWISE_STRING_EQUIVALENCE</pre>
<div class="block">Equivalence that compares <code>Lists</code>s by the
<code>Object.toString()</code> of their elements.</div>
</li>
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<h4>cluster</h4>
<pre>public final&nbsp;<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a> cluster</pre>
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<h4>rowType</h4>
<pre>public final&nbsp;<a href="../type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> rowType</pre>
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<h4>type</h4>
<pre>protected final&nbsp;<a href="MutableRelType.html" title="enum in org.apache.calcite.rel.mutable">MutableRelType</a> type</pre>
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<h4>parent</h4>
<pre>protected&nbsp;<a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a> parent</pre>
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<h4>ordinalInParent</h4>
<pre>protected&nbsp;int ordinalInParent</pre>
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<h4>MutableRel</h4>
<pre>protected&nbsp;MutableRel&#8203;(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a>&nbsp;cluster,
<a href="../type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>&nbsp;rowType,
<a href="MutableRelType.html" title="enum in org.apache.calcite.rel.mutable">MutableRelType</a>&nbsp;type)</pre>
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<h4>getParent</h4>
<pre class="methodSignature">public&nbsp;<a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a>&nbsp;getParent()</pre>
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<h4>setInput</h4>
<pre class="methodSignature">public abstract&nbsp;void&nbsp;setInput&#8203;(int&nbsp;ordinalInParent,
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<h4>getInputs</h4>
<pre class="methodSignature">public abstract&nbsp;java.util.List&lt;<a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a>&gt;&nbsp;getInputs()</pre>
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<h4>clone</h4>
<pre class="methodSignature">public abstract&nbsp;<a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a>&nbsp;clone()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>clone</code>&nbsp;in class&nbsp;<code>java.lang.Object</code></dd>
</dl>
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</ul>
<a id="childrenAccept(org.apache.calcite.rel.mutable.MutableRelVisitor)">
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<h4>childrenAccept</h4>
<pre class="methodSignature">public abstract&nbsp;void&nbsp;childrenAccept&#8203;(<a href="MutableRelVisitor.html" title="class in org.apache.calcite.rel.mutable">MutableRelVisitor</a>&nbsp;visitor)</pre>
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<a id="replaceInParent(org.apache.calcite.rel.mutable.MutableRel)">
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<h4>replaceInParent</h4>
<pre class="methodSignature">public&nbsp;<a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a>&nbsp;replaceInParent&#8203;(<a href="MutableRel.html" title="class in org.apache.calcite.rel.mutable">MutableRel</a>&nbsp;child)</pre>
<div class="block">Replaces this <code>MutableRel</code> in its parent with another node at the
same position.
<p>Before the method, <code>child</code> must be an orphan (have null parent)
and after this method, this <code>MutableRel</code> is an orphan.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>The parent</dd>
</dl>
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</ul>
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<h4>digest</h4>
<pre class="methodSignature">public abstract&nbsp;java.lang.StringBuilder&nbsp;digest&#8203;(java.lang.StringBuilder&nbsp;buf)</pre>
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<h4>deep</h4>
<pre class="methodSignature">public final&nbsp;java.lang.String&nbsp;deep()</pre>
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<h4>toString</h4>
<pre class="methodSignature">public final&nbsp;java.lang.String&nbsp;toString()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code>toString</code>&nbsp;in class&nbsp;<code>java.lang.Object</code></dd>
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