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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.plan.volcano</a></div>
<h2 title="Class VolcanoRuleMatch" class="title">Class VolcanoRuleMatch</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li><a href="../RelOptRuleCall.html" title="class in org.apache.calcite.plan">org.apache.calcite.plan.RelOptRuleCall</a></li>
<li>
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<li><a href="VolcanoRuleCall.html" title="class in org.apache.calcite.plan.volcano">org.apache.calcite.plan.volcano.VolcanoRuleCall</a></li>
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<li>org.apache.calcite.plan.volcano.VolcanoRuleMatch</li>
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<pre>class <span class="typeNameLabel">VolcanoRuleMatch</span>
extends <a href="VolcanoRuleCall.html" title="class in org.apache.calcite.plan.volcano">VolcanoRuleCall</a></pre>
<div class="block">A match of a rule to a particular set of target relational expressions,
frozen in time.</div>
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<td class="colFirst"><code>private double</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#cachedImportance">cachedImportance</a></span></code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#digest">digest</a></span></code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private <a href="RelSet.html" title="class in org.apache.calcite.plan.volcano">RelSet</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#targetSet">targetSet</a></span></code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private <a href="RelSubset.html" title="class in org.apache.calcite.plan.volcano">RelSubset</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#targetSubset">targetSubset</a></span></code></th>
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<h3>Fields inherited from class&nbsp;org.apache.calcite.plan.volcano.<a href="VolcanoRuleCall.html" title="class in org.apache.calcite.plan.volcano">VolcanoRuleCall</a></h3>
<code><a href="VolcanoRuleCall.html#volcanoPlanner">volcanoPlanner</a></code></li>
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<code><a href="../RelOptRuleCall.html#id">id</a>, <a href="../RelOptRuleCall.html#LOGGER">LOGGER</a>, <a href="../RelOptRuleCall.html#nodeInputs">nodeInputs</a>, <a href="../RelOptRuleCall.html#operand0">operand0</a>, <a href="../RelOptRuleCall.html#rels">rels</a>, <a href="../RelOptRuleCall.html#rule">rule</a></code></li>
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<th class="colFirst" scope="col">Constructor</th>
<th class="colLast" scope="col">Description</th>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.plan.volcano.VolcanoPlanner,org.apache.calcite.plan.RelOptRuleOperand,org.apache.calcite.rel.RelNode%5B%5D,java.util.Map)">VolcanoRuleMatch</a></span>&#8203;(<a href="VolcanoPlanner.html" title="class in org.apache.calcite.plan.volcano">VolcanoPlanner</a>&nbsp;volcanoPlanner,
<a href="../RelOptRuleOperand.html" title="class in org.apache.calcite.plan">RelOptRuleOperand</a>&nbsp;operand0,
<a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>[]&nbsp;rels,
java.util.Map&lt;<a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>,&#8203;java.util.List&lt;<a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&gt;&gt;&nbsp;nodeInputs)</code></th>
<td class="colLast">
<div class="block">Creates a <code>VolcanoRuleMatch</code>.</div>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><code>private static &lt;E&gt;&nbsp;boolean</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#allNotNull(E%5B%5D,org.apache.calcite.util.Litmus)">allNotNull</a></span>&#8203;(E[]&nbsp;es,
<a href="../../util/Litmus.html" title="interface in org.apache.calcite.util">Litmus</a>&nbsp;litmus)</code></th>
<td class="colLast">
<div class="block">Returns whether all elements of a given array are not-null;
fails if any are null.</div>
</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>(package private) void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#clearCachedImportance()">clearCachedImportance</a></span>()</code></th>
<td class="colLast">
<div class="block">Clears the cached importance value of this rule match.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>private java.lang.String</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#computeDigest()">computeDigest</a></span>()</code></th>
<td class="colLast">
<div class="block">Computes a string describing this rule match.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>(package private) double</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#computeImportance()">computeImportance</a></span>()</code></th>
<td class="colLast">
<div class="block">Computes the importance of this rule match.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>(package private) double</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getImportance()">getImportance</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns the importance of this rule.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>private <a href="RelSubset.html" title="class in org.apache.calcite.plan.volcano">RelSubset</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#guessSubset()">guessSubset</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a guess as to which subset (that is equivalence class of
relational expressions combined with a set of physical traits) the result
of this rule will belong to.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#recomputeDigest()">recomputeDigest</a></span>()</code></th>
<td class="colLast">
<div class="block">Recomputes the digest of this VolcanoRuleMatch.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<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;org.apache.calcite.plan.volcano.<a href="VolcanoRuleCall.html" title="class in org.apache.calcite.plan.volcano">VolcanoRuleCall</a></h3>
<code><a href="VolcanoRuleCall.html#match(org.apache.calcite.rel.RelNode)">match</a>, <a href="VolcanoRuleCall.html#onMatch()">onMatch</a>, <a href="VolcanoRuleCall.html#transformTo(org.apache.calcite.rel.RelNode,java.util.Map)">transformTo</a></code></li>
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<code><a href="../RelOptRuleCall.html#builder()">builder</a>, <a href="../RelOptRuleCall.html#getChildRels(org.apache.calcite.rel.RelNode)">getChildRels</a>, <a href="../RelOptRuleCall.html#getMetadataQuery()">getMetadataQuery</a>, <a href="../RelOptRuleCall.html#getOperand0()">getOperand0</a>, <a href="../RelOptRuleCall.html#getParents()">getParents</a>, <a href="../RelOptRuleCall.html#getPlanner()">getPlanner</a>, <a href="../RelOptRuleCall.html#getRelList()">getRelList</a>, <a href="../RelOptRuleCall.html#getRels()">getRels</a>, <a href="../RelOptRuleCall.html#getRule()">getRule</a>, <a href="../RelOptRuleCall.html#rel(int)">rel</a>, <a href="../RelOptRuleCall.html#setChildRels(org.apache.calcite.rel.RelNode,java.util.List)">setChildRels</a>, <a href="../RelOptRuleCall.html#transformTo(org.apache.calcite.rel.RelNode)">transformTo</a></code></li>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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<h4>targetSet</h4>
<pre>private final&nbsp;<a href="RelSet.html" title="class in org.apache.calcite.plan.volcano">RelSet</a> targetSet</pre>
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<h4>targetSubset</h4>
<pre>private&nbsp;<a href="RelSubset.html" title="class in org.apache.calcite.plan.volcano">RelSubset</a> targetSubset</pre>
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<pre>private&nbsp;java.lang.String digest</pre>
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<h4>cachedImportance</h4>
<pre>private&nbsp;double cachedImportance</pre>
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<h3>Constructor Detail</h3>
<a id="&lt;init&gt;(org.apache.calcite.plan.volcano.VolcanoPlanner,org.apache.calcite.plan.RelOptRuleOperand,org.apache.calcite.rel.RelNode[],java.util.Map)">
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<h4>VolcanoRuleMatch</h4>
<pre>VolcanoRuleMatch&#8203;(<a href="VolcanoPlanner.html" title="class in org.apache.calcite.plan.volcano">VolcanoPlanner</a>&nbsp;volcanoPlanner,
<a href="../RelOptRuleOperand.html" title="class in org.apache.calcite.plan">RelOptRuleOperand</a>&nbsp;operand0,
<a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>[]&nbsp;rels,
java.util.Map&lt;<a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>,&#8203;java.util.List&lt;<a href="../../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&gt;&gt;&nbsp;nodeInputs)</pre>
<div class="block">Creates a <code>VolcanoRuleMatch</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>operand0</code> - Primary operand</dd>
<dd><code>rels</code> - List of targets; copied by the constructor, so the client
can modify it later</dd>
<dd><code>nodeInputs</code> - Map from relational expressions to their inputs</dd>
</dl>
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<h4>toString</h4>
<pre class="methodSignature">public&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>
</dl>
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<h4>clearCachedImportance</h4>
<pre class="methodSignature">void&nbsp;clearCachedImportance()</pre>
<div class="block">Clears the cached importance value of this rule match. The importance
will be re-calculated next time <a href="#getImportance()"><code>getImportance()</code></a> is called.</div>
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<h4>getImportance</h4>
<pre class="methodSignature">double&nbsp;getImportance()</pre>
<div class="block">Returns the importance of this rule.
<p>Calls <a href="#computeImportance()"><code>computeImportance()</code></a> the first time, thereafter uses a
cached value until <a href="#clearCachedImportance()"><code>clearCachedImportance()</code></a> is called.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>importance of this rule; a value between 0 and 1</dd>
</dl>
</li>
</ul>
<a id="computeImportance()">
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<h4>computeImportance</h4>
<pre class="methodSignature">double&nbsp;computeImportance()</pre>
<div class="block">Computes the importance of this rule match.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>importance of this rule match</dd>
</dl>
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<h4>computeDigest</h4>
<pre class="methodSignature">private&nbsp;java.lang.String&nbsp;computeDigest()</pre>
<div class="block">Computes a string describing this rule match. Two rule matches are
equivalent if and only if their digests are the same.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>description of this rule match</dd>
</dl>
</li>
</ul>
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<h4>recomputeDigest</h4>
<pre class="methodSignature">public&nbsp;void&nbsp;recomputeDigest()</pre>
<div class="block">Recomputes the digest of this VolcanoRuleMatch. It is necessary when sets
have merged since the match was created.</div>
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<h4>guessSubset</h4>
<pre class="methodSignature">private&nbsp;<a href="RelSubset.html" title="class in org.apache.calcite.plan.volcano">RelSubset</a>&nbsp;guessSubset()</pre>
<div class="block">Returns a guess as to which subset (that is equivalence class of
relational expressions combined with a set of physical traits) the result
of this rule will belong to.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>expected subset, or null if we cannot guess</dd>
</dl>
</li>
</ul>
<a id="allNotNull(java.lang.Object[],org.apache.calcite.util.Litmus)">
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<h4>allNotNull</h4>
<pre class="methodSignature">private static&nbsp;&lt;E&gt;&nbsp;boolean&nbsp;allNotNull&#8203;(E[]&nbsp;es,
<a href="../../util/Litmus.html" title="interface in org.apache.calcite.util">Litmus</a>&nbsp;litmus)</pre>
<div class="block">Returns whether all elements of a given array are not-null;
fails if any are null.</div>
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