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<div class="subTitle">org.apache.calcite.rel.metadata</div>
<h2 title="Class RelMdUtil" class="title">Class RelMdUtil</h2>
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<li>org.apache.calcite.rel.metadata.RelMdUtil</li>
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<pre>public class <span class="typeNameLabel">RelMdUtil</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre>
<div class="block">RelMdUtil provides utility methods used by the metadata provider methods.</div>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/sql/SqlFunction.html" title="class in org.apache.calcite.sql">SqlFunction</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#ARTIFICIAL_SELECTIVITY_FUNC">ARTIFICIAL_SELECTIVITY_FUNC</a></span></code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#addEpsilon-double-">addEpsilon</a></span>(double&nbsp;d)</code>
<div class="block">Add an epsilon to the value passed in.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#areColumnsDefinitelyUnique-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-">areColumnsDefinitelyUnique</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;colMask)</code>
<div class="block">Returns true if the columns represented in a bit mask are definitely
known to form a unique column set.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#areColumnsDefinitelyUnique-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-java.util.List-">areColumnsDefinitelyUnique</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a>&gt;&nbsp;columnRefs)</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#areColumnsDefinitelyUniqueWhenNullsFiltered-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-">areColumnsDefinitelyUniqueWhenNullsFiltered</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;colMask)</code>
<div class="block">Returns true if the columns represented in a bit mask are definitely
known to form a unique column set, when nulls have been filtered from
the columns.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#areColumnsDefinitelyUniqueWhenNullsFiltered-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-java.util.List-">areColumnsDefinitelyUniqueWhenNullsFiltered</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a>&gt;&nbsp;columnRefs)</code>&nbsp;</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#areColumnsUnique-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-java.util.List-">areColumnsUnique</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a>&gt;&nbsp;columnRefs)</code>&nbsp;</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#areColumnsUniqueWhenNullsFiltered-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-java.util.List-">areColumnsUniqueWhenNullsFiltered</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a>&gt;&nbsp;columnRefs)</code>&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#capInfinity-java.lang.Double-">capInfinity</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;d)</code>
<div class="block">Caps a double value at Double.MAX_VALUE if it's currently infinity</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#cardOfProjExpr-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.core.Project-org.apache.calcite.rex.RexNode-">cardOfProjExpr</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/core/Project.html" title="class in org.apache.calcite.rel.core">Project</a>&nbsp;rel,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;expr)</code>
<div class="block">Computes the cardinality of a particular expression from the projection
list.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#checkInputForCollationAndLimit-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.RelCollation-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexNode-">checkInputForCollationAndLimit</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;input,
<a href="../../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>&nbsp;collation,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;offset,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;fetch)</code>
<div class="block">Returns whether a relational expression is already sorted and has fewer
rows than the sum of offset and limit.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#clearCache-org.apache.calcite.rel.RelNode-">clearCache</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel)</code>
<div class="block">Removes cached metadata values for specified RelNode.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#computeSemiJoinSelectivity-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.core.Join-">computeSemiJoinSelectivity</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;factRel,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;dimRel,
<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a>&nbsp;rel)</code>
<div class="block">Computes the selectivity of a semijoin filter if it is applied on a fact
table.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#computeSemiJoinSelectivity-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.RelNode-java.util.List-java.util.List-">computeSemiJoinSelectivity</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;factRel,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;dimRel,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&nbsp;factKeyList,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&nbsp;dimKeyList)</code>
<div class="block">Computes the selectivity of a semijoin filter if it is applied on a fact
table.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#estimateFilteredRows-org.apache.calcite.rel.RelNode-org.apache.calcite.rex.RexNode-org.apache.calcite.rel.metadata.RelMetadataQuery-">estimateFilteredRows</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;child,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition,
<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq)</code>&nbsp;</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#estimateFilteredRows-org.apache.calcite.rel.RelNode-org.apache.calcite.rex.RexProgram-org.apache.calcite.rel.metadata.RelMetadataQuery-">estimateFilteredRows</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;child,
<a href="../../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a>&nbsp;program,
<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq)</code>&nbsp;</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#getJoinDistinctRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.core.JoinRelType-org.apache.calcite.util.ImmutableBitSet-org.apache.calcite.rex.RexNode-boolean-">getJoinDistinctRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;joinRel,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="enum in org.apache.calcite.rel.core">JoinRelType</a>&nbsp;joinType,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;predicate,
boolean&nbsp;useMaxNdv)</code>
<div class="block">Computes the number of distinct rows for a set of keys returned from a
join.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#getJoinPopulationSize-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-">getJoinPopulationSize</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;joinRel,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey)</code>
<div class="block">Computes the population size for a set of keys returned from a join</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><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-">getJoinRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a>&nbsp;join,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition)</code>
<div class="block">Returns an estimate of the number of rows returned by a <a href="../../../../../org/apache/calcite/rel/core/Join.html" title="class in org.apache.calcite.rel.core"><code>Join</code></a>.</div>
</td>
</tr>
<tr id="i18" class="altColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#getMinusRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.core.Minus-">getMinusRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/core/Minus.html" title="class in org.apache.calcite.rel.core">Minus</a>&nbsp;minus)</code>
<div class="block">Returns an estimate of the number of rows returned by a <a href="../../../../../org/apache/calcite/rel/core/Minus.html" title="class in org.apache.calcite.rel.core"><code>Minus</code></a>.</div>
</td>
</tr>
<tr id="i19" class="rowColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#getSelectivityValue-org.apache.calcite.rex.RexNode-">getSelectivityValue</a></span>(<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;artificialSelectivityFuncNode)</code>
<div class="block">Returns the selectivity value stored in a call.</div>
</td>
</tr>
<tr id="i20" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#getSemiJoinDistinctRowCount-org.apache.calcite.rel.core.Join-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.util.ImmutableBitSet-org.apache.calcite.rex.RexNode-">getSemiJoinDistinctRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a>&nbsp;semiJoinRel,
<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;predicate)</code>
<div class="block">Computes the number of distinct rows for a set of keys returned from a
semi-join</div>
</td>
</tr>
<tr id="i21" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#getSemiJoinRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.core.JoinRelType-org.apache.calcite.rex.RexNode-">getSemiJoinRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;left,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;right,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="enum in org.apache.calcite.rel.core">JoinRelType</a>&nbsp;joinType,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition)</code>
<div class="block">Returns an estimate of the number of rows returned by a semi-join.</div>
</td>
</tr>
<tr id="i22" class="altColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#getUnionAllRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.core.Union-">getUnionAllRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/core/Union.html" title="class in org.apache.calcite.rel.core">Union</a>&nbsp;rel)</code>
<div class="block">Returns an estimate of the number of rows returned by a <a href="../../../../../org/apache/calcite/rel/core/Union.html" title="class in org.apache.calcite.rel.core"><code>Union</code></a>
(before duplicates are eliminated).</div>
</td>
</tr>
<tr id="i23" class="rowColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#guessSelectivity-org.apache.calcite.rex.RexNode-">guessSelectivity</a></span>(<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;predicate)</code>
<div class="block">Returns default estimates for selectivities, in the absence of stats.</div>
</td>
</tr>
<tr id="i24" class="altColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#guessSelectivity-org.apache.calcite.rex.RexNode-boolean-">guessSelectivity</a></span>(<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;predicate,
boolean&nbsp;artificialOnly)</code>
<div class="block">Returns default estimates for selectivities, in the absence of stats.</div>
</td>
</tr>
<tr id="i25" class="rowColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#linear-int-int-int-double-double-">linear</a></span>(int&nbsp;x,
int&nbsp;minX,
int&nbsp;maxX,
double&nbsp;minY,
double&nbsp;maxY)</code>
<div class="block">Returns a point on a line.</div>
</td>
</tr>
<tr id="i26" class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#makeSemiJoinSelectivityRexNode-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.core.Join-">makeSemiJoinSelectivityRexNode</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a>&nbsp;rel)</code>
<div class="block">Creates a RexNode that stores a selectivity value corresponding to the
selectivity of a semijoin.</div>
</td>
</tr>
<tr id="i27" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#minusPreds-org.apache.calcite.rex.RexBuilder-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexNode-">minusPreds</a></span>(<a href="../../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a>&nbsp;rexBuilder,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;pred1,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;pred2)</code>
<div class="block">Takes the difference between two predicates, removing from the first any
predicates also in the second</div>
</td>
</tr>
<tr id="i28" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#numDistinctVals-java.lang.Double-java.lang.Double-">numDistinctVals</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;domainSize,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;numSelected)</code>
<div class="block">Returns the number of distinct values provided numSelected are selected
where there are domainSize distinct values.</div>
</td>
</tr>
<tr id="i29" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#setAggChildKeys-org.apache.calcite.util.ImmutableBitSet-org.apache.calcite.rel.core.Aggregate-org.apache.calcite.util.ImmutableBitSet.Builder-">setAggChildKeys</a></span>(<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey,
<a href="../../../../../org/apache/calcite/rel/core/Aggregate.html" title="class in org.apache.calcite.rel.core">Aggregate</a>&nbsp;aggRel,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.Builder.html" title="class in org.apache.calcite.util">ImmutableBitSet.Builder</a>&nbsp;childKey)</code>
<div class="block">Takes a bitmap representing a set of input references and extracts the
ones that reference the group by columns in an aggregate.</div>
</td>
</tr>
<tr id="i30" class="altColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#setLeftRightBitmaps-org.apache.calcite.util.ImmutableBitSet-org.apache.calcite.util.ImmutableBitSet.Builder-org.apache.calcite.util.ImmutableBitSet.Builder-int-">setLeftRightBitmaps</a></span>(<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.Builder.html" title="class in org.apache.calcite.util">ImmutableBitSet.Builder</a>&nbsp;leftMask,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.Builder.html" title="class in org.apache.calcite.util">ImmutableBitSet.Builder</a>&nbsp;rightMask,
int&nbsp;nFieldsOnLeft)</code>
<div class="block">Separates a bit-mask representing a join into masks representing the left
and right inputs into the join.</div>
</td>
</tr>
<tr id="i31" class="rowColor">
<td class="colFirst"><code>static void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#splitCols-java.util.List-org.apache.calcite.util.ImmutableBitSet-org.apache.calcite.util.ImmutableBitSet.Builder-org.apache.calcite.util.ImmutableBitSet.Builder-">splitCols</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;&nbsp;projExprs,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.Builder.html" title="class in org.apache.calcite.util">ImmutableBitSet.Builder</a>&nbsp;baseCols,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.Builder.html" title="class in org.apache.calcite.util">ImmutableBitSet.Builder</a>&nbsp;projCols)</code>
<div class="block">Forms two bitmaps by splitting the columns in a bitmap according to
whether or not the column references the child input or is an expression</div>
</td>
</tr>
<tr id="i32" class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#unionPreds-org.apache.calcite.rex.RexBuilder-org.apache.calcite.rex.RexNode-org.apache.calcite.rex.RexNode-">unionPreds</a></span>(<a href="../../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a>&nbsp;rexBuilder,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;pred1,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;pred2)</code>
<div class="block">AND's two predicates together, either of which may be null, removing
redundant filters.</div>
</td>
</tr>
<tr id="i33" class="rowColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#validatePercentage-java.lang.Double-">validatePercentage</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;result)</code>
<div class="block">Validate the <code>result</code> represents a percentage number,
e.g.</div>
</td>
</tr>
<tr id="i34" class="altColor">
<td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMdUtil.html#validateResult-java.lang.Double-">validateResult</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;result)</code>
<div class="block">Validates the <code>result</code> is valid.</div>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<pre>public static final&nbsp;<a href="../../../../../org/apache/calcite/sql/SqlFunction.html" title="class in org.apache.calcite.sql">SqlFunction</a> ARTIFICIAL_SELECTIVITY_FUNC</pre>
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<h4>makeSemiJoinSelectivityRexNode</h4>
<pre>public static&nbsp;<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;makeSemiJoinSelectivityRexNode(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a>&nbsp;rel)</pre>
<div class="block">Creates a RexNode that stores a selectivity value corresponding to the
selectivity of a semijoin. This can be added to a filter to simulate the
effect of the semijoin during costing, but should never appear in a real
plan since it has no physical implementation.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rel</code> - the semijoin of interest</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>constructed rexnode</dd>
</dl>
</li>
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<pre>public static&nbsp;double&nbsp;getSelectivityValue(<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;artificialSelectivityFuncNode)</pre>
<div class="block">Returns the selectivity value stored in a call.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>artificialSelectivityFuncNode</code> - Call containing the selectivity value</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>selectivity value</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;double&nbsp;computeSemiJoinSelectivity(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;factRel,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;dimRel,
<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a>&nbsp;rel)</pre>
<div class="block">Computes the selectivity of a semijoin filter if it is applied on a fact
table. The computation is based on the selectivity of the dimension
table/columns and the number of distinct values in the fact table
columns.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>factRel</code> - fact table participating in the semijoin</dd>
<dd><code>dimRel</code> - dimension table participating in the semijoin</dd>
<dd><code>rel</code> - semijoin rel</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>calculated selectivity</dd>
</dl>
</li>
</ul>
<a name="computeSemiJoinSelectivity-org.apache.calcite.rel.metadata.RelMetadataQuery-org.apache.calcite.rel.RelNode-org.apache.calcite.rel.RelNode-java.util.List-java.util.List-">
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<pre>public static&nbsp;double&nbsp;computeSemiJoinSelectivity(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;factRel,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;dimRel,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&nbsp;factKeyList,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&nbsp;dimKeyList)</pre>
<div class="block">Computes the selectivity of a semijoin filter if it is applied on a fact
table. The computation is based on the selectivity of the dimension
table/columns and the number of distinct values in the fact table
columns.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>factRel</code> - fact table participating in the semijoin</dd>
<dd><code>dimRel</code> - dimension table participating in the semijoin</dd>
<dd><code>factKeyList</code> - LHS keys used in the filter</dd>
<dd><code>dimKeyList</code> - RHS keys used in the filter</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>calculated selectivity</dd>
</dl>
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<pre>public static&nbsp;boolean&nbsp;areColumnsDefinitelyUnique(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;colMask)</pre>
<div class="block">Returns true if the columns represented in a bit mask are definitely
known to form a unique column set.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rel</code> - the relational expression that the column mask corresponds
to</dd>
<dd><code>colMask</code> - bit mask containing columns that will be tested for
uniqueness</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if bit mask represents a unique column set; false if not (or
if no metadata is available)</dd>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="class or interface in java.lang">Boolean</a>&nbsp;areColumnsUnique(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a>&gt;&nbsp;columnRefs)</pre>
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<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a>&gt;&nbsp;columnRefs)</pre>
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<pre>public static&nbsp;boolean&nbsp;areColumnsDefinitelyUniqueWhenNullsFiltered(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;colMask)</pre>
<div class="block">Returns true if the columns represented in a bit mask are definitely
known to form a unique column set, when nulls have been filtered from
the columns.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rel</code> - the relational expression that the column mask corresponds
to</dd>
<dd><code>colMask</code> - bit mask containing columns that will be tested for
uniqueness</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if bit mask represents a unique column set; false if not (or
if no metadata is available)</dd>
</dl>
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<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a>&gt;&nbsp;columnRefs)</pre>
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<pre>public static&nbsp;boolean&nbsp;areColumnsDefinitelyUniqueWhenNullsFiltered(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexInputRef.html" title="class in org.apache.calcite.rex">RexInputRef</a>&gt;&nbsp;columnRefs)</pre>
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<pre>public static&nbsp;void&nbsp;setLeftRightBitmaps(<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.Builder.html" title="class in org.apache.calcite.util">ImmutableBitSet.Builder</a>&nbsp;leftMask,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.Builder.html" title="class in org.apache.calcite.util">ImmutableBitSet.Builder</a>&nbsp;rightMask,
int&nbsp;nFieldsOnLeft)</pre>
<div class="block">Separates a bit-mask representing a join into masks representing the left
and right inputs into the join.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>groupKey</code> - original bit-mask</dd>
<dd><code>leftMask</code> - left bit-mask to be set</dd>
<dd><code>rightMask</code> - right bit-mask to be set</dd>
<dd><code>nFieldsOnLeft</code> - number of fields in the left input</dd>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;numDistinctVals(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;domainSize,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;numSelected)</pre>
<div class="block">Returns the number of distinct values provided numSelected are selected
where there are domainSize distinct values.
<p>Note that in the case where domainSize == numSelected, it's not true
that the return value should be domainSize. If you pick 100 random values
between 1 and 100, you'll most likely end up with fewer than 100 distinct
values, because you'll pick some values more than once.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>domainSize</code> - number of distinct values in the domain</dd>
<dd><code>numSelected</code> - number selected from the domain</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>number of distinct values for subset selected</dd>
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<pre>public static&nbsp;double&nbsp;capInfinity(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;d)</pre>
<div class="block">Caps a double value at Double.MAX_VALUE if it's currently infinity</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>d</code> - the Double object</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the double value if it's not infinity; else Double.MAX_VALUE</dd>
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<pre>public static&nbsp;double&nbsp;guessSelectivity(<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;predicate)</pre>
<div class="block">Returns default estimates for selectivities, in the absence of stats.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>predicate</code> - predicate for which selectivity will be computed; null
means true, so gives selectity of 1.0</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>estimated selectivity</dd>
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<pre>public static&nbsp;double&nbsp;guessSelectivity(<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;predicate,
boolean&nbsp;artificialOnly)</pre>
<div class="block">Returns default estimates for selectivities, in the absence of stats.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>predicate</code> - predicate for which selectivity will be computed;
null means true, so gives selectity of 1.0</dd>
<dd><code>artificialOnly</code> - return only the selectivity contribution from
artificial nodes</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>estimated selectivity</dd>
</dl>
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<pre>public static&nbsp;<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;unionPreds(<a href="../../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a>&nbsp;rexBuilder,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;pred1,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;pred2)</pre>
<div class="block">AND's two predicates together, either of which may be null, removing
redundant filters.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rexBuilder</code> - rexBuilder used to construct AND'd RexNode</dd>
<dd><code>pred1</code> - first predicate</dd>
<dd><code>pred2</code> - second predicate</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>AND'd predicate or individual predicates if one is null</dd>
</dl>
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<pre>public static&nbsp;<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;minusPreds(<a href="../../../../../org/apache/calcite/rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a>&nbsp;rexBuilder,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;pred1,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;pred2)</pre>
<div class="block">Takes the difference between two predicates, removing from the first any
predicates also in the second</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rexBuilder</code> - rexBuilder used to construct AND'd RexNode</dd>
<dd><code>pred1</code> - first predicate</dd>
<dd><code>pred2</code> - second predicate</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>MINUS'd predicate list</dd>
</dl>
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<pre>public static&nbsp;void&nbsp;setAggChildKeys(<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey,
<a href="../../../../../org/apache/calcite/rel/core/Aggregate.html" title="class in org.apache.calcite.rel.core">Aggregate</a>&nbsp;aggRel,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.Builder.html" title="class in org.apache.calcite.util">ImmutableBitSet.Builder</a>&nbsp;childKey)</pre>
<div class="block">Takes a bitmap representing a set of input references and extracts the
ones that reference the group by columns in an aggregate.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>groupKey</code> - the original bitmap</dd>
<dd><code>aggRel</code> - the aggregate</dd>
<dd><code>childKey</code> - sets bits from groupKey corresponding to group by columns</dd>
</dl>
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<pre>public static&nbsp;void&nbsp;splitCols(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&gt;&nbsp;projExprs,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.Builder.html" title="class in org.apache.calcite.util">ImmutableBitSet.Builder</a>&nbsp;baseCols,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.Builder.html" title="class in org.apache.calcite.util">ImmutableBitSet.Builder</a>&nbsp;projCols)</pre>
<div class="block">Forms two bitmaps by splitting the columns in a bitmap according to
whether or not the column references the child input or is an expression</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>projExprs</code> - Project expressions</dd>
<dd><code>groupKey</code> - Bitmap whose columns will be split</dd>
<dd><code>baseCols</code> - Bitmap representing columns from the child input</dd>
<dd><code>projCols</code> - Bitmap representing non-child columns</dd>
</dl>
</li>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;cardOfProjExpr(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/core/Project.html" title="class in org.apache.calcite.rel.core">Project</a>&nbsp;rel,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;expr)</pre>
<div class="block">Computes the cardinality of a particular expression from the projection
list.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rel</code> - RelNode corresponding to the project</dd>
<dd><code>expr</code> - projection expression</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>cardinality</dd>
</dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;getJoinPopulationSize(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;joinRel,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey)</pre>
<div class="block">Computes the population size for a set of keys returned from a join</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>joinRel</code> - the join rel</dd>
<dd><code>groupKey</code> - keys to compute the population for</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>computed population size</dd>
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<pre>public static&nbsp;double&nbsp;addEpsilon(double&nbsp;d)</pre>
<div class="block">Add an epsilon to the value passed in.</div>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;getSemiJoinDistinctRowCount(<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a>&nbsp;semiJoinRel,
<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;predicate)</pre>
<div class="block">Computes the number of distinct rows for a set of keys returned from a
semi-join</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>semiJoinRel</code> - RelNode representing the semi-join</dd>
<dd><code>mq</code> - metadata query</dd>
<dd><code>groupKey</code> - keys that the distinct row count will be computed for</dd>
<dd><code>predicate</code> - join predicate</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>number of distinct rows</dd>
</dl>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;getJoinDistinctRowCount(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;joinRel,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="enum in org.apache.calcite.rel.core">JoinRelType</a>&nbsp;joinType,
<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="class in org.apache.calcite.util">ImmutableBitSet</a>&nbsp;groupKey,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;predicate,
boolean&nbsp;useMaxNdv)</pre>
<div class="block">Computes the number of distinct rows for a set of keys returned from a
join. Also known as NDV (number of distinct values).</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>joinRel</code> - RelNode representing the join</dd>
<dd><code>joinType</code> - type of join</dd>
<dd><code>groupKey</code> - keys that the distinct row count will be computed for</dd>
<dd><code>predicate</code> - join predicate</dd>
<dd><code>useMaxNdv</code> - If true use formula <code>max(left NDV, right NDV)</code>,
otherwise use <code>left NDV * right NDV</code>.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>number of distinct rows</dd>
</dl>
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<pre>public static&nbsp;double&nbsp;getUnionAllRowCount(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/core/Union.html" title="class in org.apache.calcite.rel.core">Union</a>&nbsp;rel)</pre>
<div class="block">Returns an estimate of the number of rows returned by a <a href="../../../../../org/apache/calcite/rel/core/Union.html" title="class in org.apache.calcite.rel.core"><code>Union</code></a>
(before duplicates are eliminated).</div>
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<pre>public static&nbsp;double&nbsp;getMinusRowCount(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/core/Minus.html" title="class in org.apache.calcite.rel.core">Minus</a>&nbsp;minus)</pre>
<div class="block">Returns an estimate of the number of rows returned by a <a href="../../../../../org/apache/calcite/rel/core/Minus.html" title="class in org.apache.calcite.rel.core"><code>Minus</code></a>.</div>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;getJoinRowCount(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/core/Join.html" title="class in org.apache.calcite.rel.core">Join</a>&nbsp;join,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition)</pre>
<div class="block">Returns an estimate of the number of rows returned by a <a href="../../../../../org/apache/calcite/rel/core/Join.html" title="class in org.apache.calcite.rel.core"><code>Join</code></a>.</div>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;getSemiJoinRowCount(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;left,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;right,
<a href="../../../../../org/apache/calcite/rel/core/JoinRelType.html" title="enum in org.apache.calcite.rel.core">JoinRelType</a>&nbsp;joinType,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition)</pre>
<div class="block">Returns an estimate of the number of rows returned by a semi-join.</div>
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<pre>public static&nbsp;double&nbsp;estimateFilteredRows(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;child,
<a href="../../../../../org/apache/calcite/rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a>&nbsp;program,
<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq)</pre>
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<pre>public static&nbsp;double&nbsp;estimateFilteredRows(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;child,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;condition,
<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq)</pre>
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<pre>public static&nbsp;double&nbsp;linear(int&nbsp;x,
int&nbsp;minX,
int&nbsp;maxX,
double&nbsp;minY,
double&nbsp;maxY)</pre>
<div class="block">Returns a point on a line.
<p>The result is always a value between <code>minY</code> and <code>maxY</code>,
even if <code>x</code> is not between <code>minX</code> and <code>maxX</code>.
<p>Examples:<ul>
<li><code>linear(0, 0, 10, 100, 200</code>} returns 100 because 0 is minX
<li><code>linear(5, 0, 10, 100, 200</code>} returns 150 because 5 is
mid-way between minX and maxX
<li><code>linear(5, 0, 10, 100, 200</code>} returns 160
<li><code>linear(10, 0, 10, 100, 200</code>} returns 200 because 10 is maxX
<li><code>linear(-2, 0, 10, 100, 200</code>} returns 100 because -2 is
less than minX and is therefore treated as minX
<li><code>linear(12, 0, 10, 100, 200</code>} returns 100 because 12 is
greater than maxX and is therefore treated as maxX
</ul></div>
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<pre>public static&nbsp;boolean&nbsp;checkInputForCollationAndLimit(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a>&nbsp;mq,
<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;input,
<a href="../../../../../org/apache/calcite/rel/RelCollation.html" title="interface in org.apache.calcite.rel">RelCollation</a>&nbsp;collation,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;offset,
<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>&nbsp;fetch)</pre>
<div class="block">Returns whether a relational expression is already sorted and has fewer
rows than the sum of offset and limit.
<p>If this is the case, it is safe to push down a
<a href="../../../../../org/apache/calcite/rel/core/Sort.html" title="class in org.apache.calcite.rel.core"><code>Sort</code></a> with limit and optional offset.</div>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;validatePercentage(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;result)</pre>
<div class="block">Validate the <code>result</code> represents a percentage number,
e.g. the value interval is [0.0, 1.0].</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the <code>result</code> is a percentage number</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AssertionError.html?is-external=true" title="class or interface in java.lang">AssertionError</a></code> - if the validation fails</dd>
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<pre>public static&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;validateResult(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a>&nbsp;result)</pre>
<div class="block">Validates the <code>result</code> is valid.
<p>Never let the result go below 1, as it will result in incorrect
calculations if the row-count is used as the denominator in a
division expression. Also, cap the value at the max double value
to avoid calculations using infinity.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the corrected value from the <code>result</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AssertionError.html?is-external=true" title="class or interface in java.lang">AssertionError</a></code> - if the <code>result</code> is negative</dd>
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<pre>public static&nbsp;boolean&nbsp;clearCache(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>&nbsp;rel)</pre>
<div class="block">Removes cached metadata values for specified RelNode.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>rel</code> - RelNode whose cached metadata should be removed</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if cache for the provided RelNode was not empty</dd>
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