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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.profile</a></div>
<h2 title="Class ProfilerImpl" class="title">Class ProfilerImpl</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>org.apache.calcite.profile.ProfilerImpl</li>
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<dt>All Implemented Interfaces:</dt>
<dd><code><a href="Profiler.html" title="interface in org.apache.calcite.profile">Profiler</a></code></dd>
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<pre>public class <span class="typeNameLabel">ProfilerImpl</span>
extends java.lang.Object
implements <a href="Profiler.html" title="interface in org.apache.calcite.profile">Profiler</a></pre>
<div class="block">Implementation of <a href="Profiler.html" title="interface in org.apache.calcite.profile"><code>Profiler</code></a> that only investigates "interesting"
combinations of columns.</div>
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<th class="colSecond" scope="col">Class</th>
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</tr>
<tr class="altColor">
<td class="colFirst"><code>static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ProfilerImpl.Builder.html" title="class in org.apache.calcite.profile">ProfilerImpl.Builder</a></span></code></th>
<td class="colLast">
<div class="block">Builds a <a href="ProfilerImpl.html" title="class in org.apache.calcite.profile"><code>ProfilerImpl</code></a>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>(package private) static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ProfilerImpl.Collector.html" title="class in org.apache.calcite.profile">ProfilerImpl.Collector</a></span></code></th>
<td class="colLast">
<div class="block">Collects values of a column or columns.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code>(package private) static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ProfilerImpl.CompositeCollector.html" title="class in org.apache.calcite.profile">ProfilerImpl.CompositeCollector</a></span></code></th>
<td class="colLast">
<div class="block">Collector that collects two or more column values in a tree set.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>(package private) static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ProfilerImpl.HllCollector.html" title="class in org.apache.calcite.profile">ProfilerImpl.HllCollector</a></span></code></th>
<td class="colLast">
<div class="block">Collector that collects two or more column values into a HyperLogLog
sketch.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code>(package private) static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ProfilerImpl.HllCompositeCollector.html" title="class in org.apache.calcite.profile">ProfilerImpl.HllCompositeCollector</a></span></code></th>
<td class="colLast">
<div class="block">Collector that collects two or more column values into a HyperLogLog
sketch.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>(package private) static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ProfilerImpl.HllSingletonCollector.html" title="class in org.apache.calcite.profile">ProfilerImpl.HllSingletonCollector</a></span></code></th>
<td class="colLast">
<div class="block">Collector that collects one column value into a HyperLogLog sketch.</div>
</td>
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<td class="colFirst"><code>(package private) class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ProfilerImpl.Run.html" title="class in org.apache.calcite.profile">ProfilerImpl.Run</a></span></code></th>
<td class="colLast">
<div class="block">A run of the profiler.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>(package private) static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ProfilerImpl.SingletonCollector.html" title="class in org.apache.calcite.profile">ProfilerImpl.SingletonCollector</a></span></code></th>
<td class="colLast">
<div class="block">Collector that collects values of a single column.</div>
</td>
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<td class="colFirst"><code>(package private) static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ProfilerImpl.Space.html" title="class in org.apache.calcite.profile">ProfilerImpl.Space</a></span></code></th>
<td class="colLast">
<div class="block">Work space for a particular combination of columns.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>(package private) static class&nbsp;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ProfilerImpl.SurpriseQueue.html" title="class in org.apache.calcite.profile">ProfilerImpl.SurpriseQueue</a></span></code></th>
<td class="colLast">
<div class="block">A priority queue of the last N surprise values.</div>
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<h3>Nested classes/interfaces inherited from interface&nbsp;org.apache.calcite.profile.<a href="Profiler.html" title="interface in org.apache.calcite.profile">Profiler</a></h3>
<code><a href="Profiler.Column.html" title="class in org.apache.calcite.profile">Profiler.Column</a>, <a href="Profiler.Distribution.html" title="class in org.apache.calcite.profile">Profiler.Distribution</a>, <a href="Profiler.FunctionalDependency.html" title="class in org.apache.calcite.profile">Profiler.FunctionalDependency</a>, <a href="Profiler.Profile.html" title="class in org.apache.calcite.profile">Profiler.Profile</a>, <a href="Profiler.RowCount.html" title="class in org.apache.calcite.profile">Profiler.RowCount</a>, <a href="Profiler.Statistic.html" title="interface in org.apache.calcite.profile">Profiler.Statistic</a>, <a href="Profiler.Unique.html" title="class in org.apache.calcite.profile">Profiler.Unique</a></code></li>
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<td class="colFirst"><code>private int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#combinationsPerPass">combinationsPerPass</a></span></code></th>
<td class="colLast">
<div class="block">The number of combinations to consider per pass.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private int</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#interestingCount">interestingCount</a></span></code></th>
<td class="colLast">
<div class="block">The minimum number of combinations considered "interesting".</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code>private java.util.function.Predicate&lt;<a href="../util/Pair.html" title="class in org.apache.calcite.util">Pair</a>&lt;<a href="ProfilerImpl.Space.html" title="class in org.apache.calcite.profile">ProfilerImpl.Space</a>,&#8203;<a href="Profiler.Column.html" title="class in org.apache.calcite.profile">Profiler.Column</a>&gt;&gt;</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#predicate">predicate</a></span></code></th>
<td class="colLast">
<div class="block">Whether a successor is considered interesting enough to analyze.</div>
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<th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(int,int,java.util.function.Predicate)">ProfilerImpl</a></span>&#8203;(int&nbsp;combinationsPerPass,
int&nbsp;interestingCount,
java.util.function.Predicate&lt;<a href="../util/Pair.html" title="class in org.apache.calcite.util">Pair</a>&lt;<a href="ProfilerImpl.Space.html" title="class in org.apache.calcite.profile">ProfilerImpl.Space</a>,&#8203;<a href="Profiler.Column.html" title="class in org.apache.calcite.profile">Profiler.Column</a>&gt;&gt;&nbsp;predicate)</code></th>
<td class="colLast">
<div class="block">Creates a <code>ProfilerImpl</code>.</div>
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<td class="colFirst"><code>static <a href="ProfilerImpl.Builder.html" title="class in org.apache.calcite.profile">ProfilerImpl.Builder</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#builder()">builder</a></span>()</code></th>
<td class="colLast">&nbsp;</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="Profiler.Profile.html" title="class in org.apache.calcite.profile">Profiler.Profile</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#profile(java.lang.Iterable,java.util.List,java.util.Collection)">profile</a></span>&#8203;(java.lang.Iterable&lt;java.util.List&lt;java.lang.Comparable&gt;&gt;&nbsp;rows,
java.util.List&lt;<a href="Profiler.Column.html" title="class in org.apache.calcite.profile">Profiler.Column</a>&gt;&nbsp;columns,
java.util.Collection&lt;<a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&gt;&nbsp;initialGroups)</code></th>
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<div class="block">Creates a profile of a data set.</div>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>combinationsPerPass</h4>
<pre>private final&nbsp;int combinationsPerPass</pre>
<div class="block">The number of combinations to consider per pass.
The number is determined by memory, but a value of 1,000 is typical.
You need 2KB memory per sketch, and one sketch for each combination.</div>
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<h4>interestingCount</h4>
<pre>private final&nbsp;int interestingCount</pre>
<div class="block">The minimum number of combinations considered "interesting". After that,
a combination is only considered "interesting" if its surprise is greater
than the median surprise.</div>
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<h4>predicate</h4>
<pre>private final&nbsp;java.util.function.Predicate&lt;<a href="../util/Pair.html" title="class in org.apache.calcite.util">Pair</a>&lt;<a href="ProfilerImpl.Space.html" title="class in org.apache.calcite.profile">ProfilerImpl.Space</a>,&#8203;<a href="Profiler.Column.html" title="class in org.apache.calcite.profile">Profiler.Column</a>&gt;&gt; predicate</pre>
<div class="block">Whether a successor is considered interesting enough to analyze.</div>
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<h4>ProfilerImpl</h4>
<pre>ProfilerImpl&#8203;(int&nbsp;combinationsPerPass,
int&nbsp;interestingCount,
java.util.function.Predicate&lt;<a href="../util/Pair.html" title="class in org.apache.calcite.util">Pair</a>&lt;<a href="ProfilerImpl.Space.html" title="class in org.apache.calcite.profile">ProfilerImpl.Space</a>,&#8203;<a href="Profiler.Column.html" title="class in org.apache.calcite.profile">Profiler.Column</a>&gt;&gt;&nbsp;predicate)</pre>
<div class="block">Creates a <code>ProfilerImpl</code>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>combinationsPerPass</code> - Maximum number of columns (or combinations of
columns) to compute each pass</dd>
<dd><code>interestingCount</code> - Minimum number of combinations considered
interesting</dd>
<dd><code>predicate</code> - Whether a successor is considered interesting enough to
analyze</dd>
</dl>
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<h4>builder</h4>
<pre class="methodSignature">public static&nbsp;<a href="ProfilerImpl.Builder.html" title="class in org.apache.calcite.profile">ProfilerImpl.Builder</a>&nbsp;builder()</pre>
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<h4>profile</h4>
<pre class="methodSignature">public&nbsp;<a href="Profiler.Profile.html" title="class in org.apache.calcite.profile">Profiler.Profile</a>&nbsp;profile&#8203;(java.lang.Iterable&lt;java.util.List&lt;java.lang.Comparable&gt;&gt;&nbsp;rows,
java.util.List&lt;<a href="Profiler.Column.html" title="class in org.apache.calcite.profile">Profiler.Column</a>&gt;&nbsp;columns,
java.util.Collection&lt;<a href="../util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&gt;&nbsp;initialGroups)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="Profiler.html#profile(java.lang.Iterable,java.util.List,java.util.Collection)">Profiler</a></code></span></div>
<div class="block">Creates a profile of a data set.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="Profiler.html#profile(java.lang.Iterable,java.util.List,java.util.Collection)">profile</a></code>&nbsp;in interface&nbsp;<code><a href="Profiler.html" title="interface in org.apache.calcite.profile">Profiler</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rows</code> - List of rows. Can be iterated over more than once (maybe not
cheaply)</dd>
<dd><code>columns</code> - Column definitions</dd>
<dd><code>initialGroups</code> - List of combinations of columns that should be
profiled early, because they may be interesting</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A profile describing relationships within the data set</dd>
</dl>
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