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| <div class="subTitle">org.apache.calcite.rel.metadata</div> |
| <h2 title="类 RelMetadataQuery" class="title">类 RelMetadataQuery</h2> |
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| <ul class="inheritance"> |
| <li><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html" title="org.apache.calcite.rel.metadata中的类">org.apache.calcite.rel.metadata.RelMetadataQueryBase</a></li> |
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| <pre>public class <span class="typeNameLabel">RelMetadataQuery</span> |
| extends <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html" title="org.apache.calcite.rel.metadata中的类">RelMetadataQueryBase</a></pre> |
| <div class="block">RelMetadataQuery provides a strongly-typed facade on top of |
| <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataProvider.html" title="org.apache.calcite.rel.metadata中的接口"><code>RelMetadataProvider</code></a> for the set of relational expression metadata |
| queries defined as standard within Calcite. The Javadoc on these methods |
| serves as their primary specification. |
| |
| <p>To add a new standard query <code>Xyz</code> to this interface, follow |
| these steps: |
| |
| <ol> |
| <li>Add a static method <code>getXyz</code> specification to this class. |
| <li>Add unit tests to <code>org.apache.calcite.test.RelMetadataTest</code>. |
| <li>Write a new provider class <code>RelMdXyz</code> in this package. Follow |
| the pattern from an existing class such as <a href="../../../../../org/apache/calcite/rel/metadata/RelMdColumnOrigins.html" title="org.apache.calcite.rel.metadata中的类"><code>RelMdColumnOrigins</code></a>, |
| overloading on all of the logical relational expressions to which the query |
| applies. |
| <li>Add a <code>SOURCE</code> static member, similar to |
| <a href="../../../../../org/apache/calcite/rel/metadata/RelMdColumnOrigins.html#SOURCE"><code>RelMdColumnOrigins.SOURCE</code></a>. |
| <li>Register the <code>SOURCE</code> object in <a href="../../../../../org/apache/calcite/rel/metadata/DefaultRelMetadataProvider.html" title="org.apache.calcite.rel.metadata中的类"><code>DefaultRelMetadataProvider</code></a>. |
| <li>Get unit tests working. |
| </ol> |
| |
| <p>Because relational expression metadata is extensible, extension projects |
| can define similar facades in order to specify access to custom metadata. |
| Please do not add queries here (nor on <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口"><code>RelNode</code></a>) which lack meaning |
| outside of your extension. |
| |
| <p>Besides adding new metadata queries, extension projects may need to add |
| custom providers for the standard queries in order to handle additional |
| relational expressions (either logical or physical). In either case, the |
| process is the same: write a reflective provider and chain it on to an |
| instance of <a href="../../../../../org/apache/calcite/rel/metadata/DefaultRelMetadataProvider.html" title="org.apache.calcite.rel.metadata中的类"><code>DefaultRelMetadataProvider</code></a>, pre-pending it to the default |
| providers. Then supply that instance to the planner via the appropriate |
| plugin mechanism.</div> |
| </li> |
| </ul> |
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| <h3>字段概要</h3> |
| <ul class="blockList"> |
| <li class="blockList"><a name="fields.inherited.from.class.org.apache.calcite.rel.metadata.RelMetadataQueryBase"> |
| <!-- --> |
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| <h3>从类继承的字段 org.apache.calcite.rel.metadata.<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html" title="org.apache.calcite.rel.metadata中的类">RelMetadataQueryBase</a></h3> |
| <code><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html#map">map</a>, <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html#metadataProvider">metadataProvider</a>, <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html#THREAD_PROVIDERS">THREAD_PROVIDERS</a></code></li> |
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| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| <h3>构造器概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="构造器概要表, 列表构造器和解释"> |
| <caption><span>构造器</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符</th> |
| <th class="colLast" scope="col">构造器和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#RelMetadataQuery--">RelMetadataQuery</a></span>()</code> |
| <div class="block">Creates the instance with <a href="../../../../../org/apache/calcite/rel/metadata/JaninoRelMetadataProvider.html" title="org.apache.calcite.rel.metadata中的类"><code>JaninoRelMetadataProvider</code></a> instance |
| from <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html#THREAD_PROVIDERS"><code>RelMetadataQueryBase.THREAD_PROVIDERS</code></a> and <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#EMPTY"><code>EMPTY</code></a> as a prototype.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| </a> |
| <h3>方法概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释"> |
| <caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">静态方法</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">方法和说明</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="java.lang中的类或接口">Boolean</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#areColumnsUnique-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-">areColumnsUnique</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a> columns)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.ColumnUniqueness.html#areColumnsUnique-org.apache.calcite.util.ImmutableBitSet-boolean-"><code>BuiltInMetadata.ColumnUniqueness.areColumnsUnique(ImmutableBitSet, boolean)</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="java.lang中的类或接口">Boolean</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#areColumnsUnique-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-boolean-">areColumnsUnique</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a> columns, |
| boolean ignoreNulls)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.ColumnUniqueness.html#areColumnsUnique-org.apache.calcite.util.ImmutableBitSet-boolean-"><code>BuiltInMetadata.ColumnUniqueness.areColumnsUnique(ImmutableBitSet, boolean)</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="java.lang中的类或接口">Boolean</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#areRowsUnique-org.apache.calcite.rel.RelNode-">areRowsUnique</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns whether the rows of a given relational expression are distinct.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>com.google.common.collect.ImmutableList<<a href="../../../../../org/apache/calcite/rel/RelCollation.html" title="org.apache.calcite.rel中的接口">RelCollation</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#collations-org.apache.calcite.rel.RelNode-">collations</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Collation.html#collations--"><code>BuiltInMetadata.Collation.collations()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#cumulativeMemoryWithinPhase-org.apache.calcite.rel.RelNode-">cumulativeMemoryWithinPhase</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Memory.html#cumulativeMemoryWithinPhase--"><code>BuiltInMetadata.Memory.cumulativeMemoryWithinPhase()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#cumulativeMemoryWithinPhaseSplit-org.apache.calcite.rel.RelNode-">cumulativeMemoryWithinPhaseSplit</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Memory.html#cumulativeMemoryWithinPhaseSplit--"><code>BuiltInMetadata.Memory.cumulativeMemoryWithinPhaseSplit()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/RelDistribution.html" title="org.apache.calcite.rel中的接口">RelDistribution</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#distribution-org.apache.calcite.rel.RelNode-">distribution</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Distribution.html#distribution--"><code>BuiltInMetadata.Distribution.distribution()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/plan/RelOptPredicateList.html" title="org.apache.calcite.plan中的类">RelOptPredicateList</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getAllPredicates-org.apache.calcite.rel.RelNode-">getAllPredicates</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.AllPredicates.html#getAllPredicates--"><code>BuiltInMetadata.AllPredicates.getAllPredicates()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getAverageColumnSizes-org.apache.calcite.rel.RelNode-">getAverageColumnSizes</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Size.html#averageColumnSizes--"><code>BuiltInMetadata.Size.averageColumnSizes()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getAverageColumnSizesNotNull-org.apache.calcite.rel.RelNode-">getAverageColumnSizesNotNull</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">As <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getAverageColumnSizes-org.apache.calcite.rel.RelNode-"><code>getAverageColumnSizes(org.apache.calcite.rel.RelNode)</code></a> but |
| never returns a null list, only ever a list of nulls.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getAverageRowSize-org.apache.calcite.rel.RelNode-">getAverageRowSize</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Size.html#averageRowSize--"><code>BuiltInMetadata.Size.averageRowSize()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/metadata/RelColumnOrigin.html" title="org.apache.calcite.rel.metadata中的类">RelColumnOrigin</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getColumnOrigin-org.apache.calcite.rel.RelNode-int-">getColumnOrigin</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| int column)</code> |
| <div class="block">Determines the origin of a column, provided the column maps to a single |
| column that isn't derived.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a><<a href="../../../../../org/apache/calcite/rel/metadata/RelColumnOrigin.html" title="org.apache.calcite.rel.metadata中的类">RelColumnOrigin</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getColumnOrigins-org.apache.calcite.rel.RelNode-int-">getColumnOrigins</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| int column)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.ColumnOrigin.html#getColumnOrigins-int-"><code>BuiltInMetadata.ColumnOrigin.getColumnOrigins(int)</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getCumulativeCost-org.apache.calcite.rel.RelNode-">getCumulativeCost</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.CumulativeCost.html#getCumulativeCost--"><code>BuiltInMetadata.CumulativeCost.getCumulativeCost()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getDistinctRowCount-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-org.apache.calcite.rex.RexNode-">getDistinctRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a> groupKey, |
| <a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> predicate)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.DistinctRowCount.html#getDistinctRowCount-org.apache.calcite.util.ImmutableBitSet-org.apache.calcite.rex.RexNode-"><code>BuiltInMetadata.DistinctRowCount.getDistinctRowCount(ImmutableBitSet, RexNode)</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/RelDistribution.html" title="org.apache.calcite.rel中的接口">RelDistribution</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getDistribution-org.apache.calcite.rel.RelNode-">getDistribution</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Distribution.html#distribution--"><code>BuiltInMetadata.Distribution.distribution()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a><<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getExpressionLineage-org.apache.calcite.rel.RelNode-org.apache.calcite.rex.RexNode-">getExpressionLineage</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> expression)</code> |
| <div class="block">Determines the origin of a column.</div> |
| </td> |
| </tr> |
| <tr id="i17" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getMaxRowCount-org.apache.calcite.rel.RelNode-">getMaxRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.MaxRowCount.html#getMaxRowCount--"><code>BuiltInMetadata.MaxRowCount.getMaxRowCount()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i18" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getMinRowCount-org.apache.calcite.rel.RelNode-">getMinRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.MinRowCount.html#getMinRowCount--"><code>BuiltInMetadata.MinRowCount.getMinRowCount()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i19" class="rowColor"> |
| <td class="colFirst"><code>com.google.common.collect.Multimap<<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a><? extends <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>>,<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getNodeTypes-org.apache.calcite.rel.RelNode-">getNodeTypes</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.NodeTypes.html#getNodeTypes--"><code>BuiltInMetadata.NodeTypes.getNodeTypes()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i20" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getNonCumulativeCost-org.apache.calcite.rel.RelNode-">getNonCumulativeCost</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.NonCumulativeCost.html#getNonCumulativeCost--"><code>BuiltInMetadata.NonCumulativeCost.getNonCumulativeCost()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i21" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getPercentageOriginalRows-org.apache.calcite.rel.RelNode-">getPercentageOriginalRows</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.PercentageOriginalRows.html#getPercentageOriginalRows--"><code>BuiltInMetadata.PercentageOriginalRows.getPercentageOriginalRows()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i22" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getPopulationSize-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-">getPopulationSize</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a> groupKey)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.PopulationSize.html#getPopulationSize-org.apache.calcite.util.ImmutableBitSet-"><code>BuiltInMetadata.PopulationSize.getPopulationSize(ImmutableBitSet)</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i23" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/plan/RelOptPredicateList.html" title="org.apache.calcite.plan中的类">RelOptPredicateList</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getPulledUpPredicates-org.apache.calcite.rel.RelNode-">getPulledUpPredicates</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Predicates.html#getPredicates--"><code>BuiltInMetadata.Predicates.getPredicates()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i24" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getRowCount-org.apache.calcite.rel.RelNode-">getRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.RowCount.html#getRowCount--"><code>BuiltInMetadata.RowCount.getRowCount()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i25" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getSelectivity-org.apache.calcite.rel.RelNode-org.apache.calcite.rex.RexNode-">getSelectivity</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> predicate)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Selectivity.html#getSelectivity-org.apache.calcite.rex.RexNode-"><code>BuiltInMetadata.Selectivity.getSelectivity(RexNode)</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i26" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getTableOrigin-org.apache.calcite.rel.RelNode-">getTableOrigin</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Determines the origin of a <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口"><code>RelNode</code></a>, provided it maps to a single |
| table, optionally with filtering and projection.</div> |
| </td> |
| </tr> |
| <tr id="i27" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a><<a href="../../../../../org/apache/calcite/rex/RexTableInputRef.RelTableRef.html" title="org.apache.calcite.rex中的类">RexTableInputRef.RelTableRef</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getTableReferences-org.apache.calcite.rel.RelNode-">getTableReferences</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Determines the tables used by a plan.</div> |
| </td> |
| </tr> |
| <tr id="i28" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a><<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getUniqueKeys-org.apache.calcite.rel.RelNode-">getUniqueKeys</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.UniqueKeys.html#getUniqueKeys-boolean-"><code>BuiltInMetadata.UniqueKeys.getUniqueKeys(boolean)</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i29" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a><<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getUniqueKeys-org.apache.calcite.rel.RelNode-boolean-">getUniqueKeys</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| boolean ignoreNulls)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.UniqueKeys.html#getUniqueKeys-boolean-"><code>BuiltInMetadata.UniqueKeys.getUniqueKeys(boolean)</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i30" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="org.apache.calcite.rel.metadata中的类">RelMetadataQuery</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#instance--">instance</a></span>()</code> |
| <div class="block">Returns an instance of RelMetadataQuery.</div> |
| </td> |
| </tr> |
| <tr id="i31" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="java.lang中的类或接口">Boolean</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#isPhaseTransition-org.apache.calcite.rel.RelNode-">isPhaseTransition</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Parallelism.html#isPhaseTransition--"><code>BuiltInMetadata.Parallelism.isPhaseTransition()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i32" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#isVisibleInExplain-org.apache.calcite.rel.RelNode-org.apache.calcite.sql.SqlExplainLevel-">isVisibleInExplain</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/sql/SqlExplainLevel.html" title="org.apache.calcite.sql中的枚举">SqlExplainLevel</a> explainLevel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.ExplainVisibility.html#isVisibleInExplain-org.apache.calcite.sql.SqlExplainLevel-"><code>BuiltInMetadata.ExplainVisibility.isVisibleInExplain(SqlExplainLevel)</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i33" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#memory-org.apache.calcite.rel.RelNode-">memory</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Memory.html#memory--"><code>BuiltInMetadata.Memory.memory()</code></a> |
| statistic.</div> |
| </td> |
| </tr> |
| <tr id="i34" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#splitCount-org.apache.calcite.rel.RelNode-">splitCount</a></span>(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</code> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Parallelism.html#splitCount--"><code>BuiltInMetadata.Parallelism.splitCount()</code></a> |
| statistic.</div> |
| </td> |
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| <h3>从类继承的方法 org.apache.calcite.rel.metadata.<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html" title="org.apache.calcite.rel.metadata中的类">RelMetadataQueryBase</a></h3> |
| <code><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html#clearCache-org.apache.calcite.rel.RelNode-">clearCache</a>, <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html#initialHandler-java.lang.Class-">initialHandler</a>, <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html#revise-java.lang.Class-org.apache.calcite.rel.metadata.MetadataDef-">revise</a></code></li> |
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| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li> |
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| <h3>构造器详细资料</h3> |
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| <h4>RelMetadataQuery</h4> |
| <pre>protected RelMetadataQuery()</pre> |
| <div class="block">Creates the instance with <a href="../../../../../org/apache/calcite/rel/metadata/JaninoRelMetadataProvider.html" title="org.apache.calcite.rel.metadata中的类"><code>JaninoRelMetadataProvider</code></a> instance |
| from <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQueryBase.html#THREAD_PROVIDERS"><code>RelMetadataQueryBase.THREAD_PROVIDERS</code></a> and <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#EMPTY"><code>EMPTY</code></a> as a prototype.</div> |
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| <h4>instance</h4> |
| <pre>public static <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="org.apache.calcite.rel.metadata中的类">RelMetadataQuery</a> instance()</pre> |
| <div class="block">Returns an instance of RelMetadataQuery. It ensures that cycles do not |
| occur while computing metadata.</div> |
| </li> |
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| <a name="getNodeTypes-org.apache.calcite.rel.RelNode-"> |
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| <h4>getNodeTypes</h4> |
| <pre>public com.google.common.collect.Multimap<<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a><? extends <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>>,<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>> getNodeTypes(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.NodeTypes.html#getNodeTypes--"><code>BuiltInMetadata.NodeTypes.getNodeTypes()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRowCount-org.apache.calcite.rel.RelNode-"> |
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| <h4>getRowCount</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> getRowCount(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.RowCount.html#getRowCount--"><code>BuiltInMetadata.RowCount.getRowCount()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>estimated row count, or null if no reliable estimate can be |
| determined</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getMaxRowCount-org.apache.calcite.rel.RelNode-"> |
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| <h4>getMaxRowCount</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> getMaxRowCount(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.MaxRowCount.html#getMaxRowCount--"><code>BuiltInMetadata.MaxRowCount.getMaxRowCount()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>max row count</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getMinRowCount-org.apache.calcite.rel.RelNode-"> |
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| <h4>getMinRowCount</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> getMinRowCount(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.MinRowCount.html#getMinRowCount--"><code>BuiltInMetadata.MinRowCount.getMinRowCount()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>max row count</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getCumulativeCost-org.apache.calcite.rel.RelNode-"> |
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| <h4>getCumulativeCost</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a> getCumulativeCost(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.CumulativeCost.html#getCumulativeCost--"><code>BuiltInMetadata.CumulativeCost.getCumulativeCost()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>estimated cost, or null if no reliable estimate can be determined</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getNonCumulativeCost-org.apache.calcite.rel.RelNode-"> |
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| <h4>getNonCumulativeCost</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/plan/RelOptCost.html" title="org.apache.calcite.plan中的接口">RelOptCost</a> getNonCumulativeCost(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.NonCumulativeCost.html#getNonCumulativeCost--"><code>BuiltInMetadata.NonCumulativeCost.getNonCumulativeCost()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>estimated cost, or null if no reliable estimate can be determined</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getPercentageOriginalRows-org.apache.calcite.rel.RelNode-"> |
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| <h4>getPercentageOriginalRows</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> getPercentageOriginalRows(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.PercentageOriginalRows.html#getPercentageOriginalRows--"><code>BuiltInMetadata.PercentageOriginalRows.getPercentageOriginalRows()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>estimated percentage (between 0.0 and 1.0), or null if no |
| reliable estimate can be determined</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getColumnOrigins-org.apache.calcite.rel.RelNode-int-"> |
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| <h4>getColumnOrigins</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a><<a href="../../../../../org/apache/calcite/rel/metadata/RelColumnOrigin.html" title="org.apache.calcite.rel.metadata中的类">RelColumnOrigin</a>> getColumnOrigins(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| int column)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.ColumnOrigin.html#getColumnOrigins-int-"><code>BuiltInMetadata.ColumnOrigin.getColumnOrigins(int)</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dd><code>column</code> - 0-based ordinal for output column of interest</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>set of origin columns, or null if this information cannot be |
| determined (whereas empty set indicates definitely no origin columns at |
| all)</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getColumnOrigin-org.apache.calcite.rel.RelNode-int-"> |
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| <h4>getColumnOrigin</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/rel/metadata/RelColumnOrigin.html" title="org.apache.calcite.rel.metadata中的类">RelColumnOrigin</a> getColumnOrigin(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| int column)</pre> |
| <div class="block">Determines the origin of a column, provided the column maps to a single |
| column that isn't derived.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the RelNode of the column</dd> |
| <dd><code>column</code> - the offset of the column whose origin we are trying to |
| determine</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>the origin of a column provided it's a simple column; otherwise, |
| returns null</dd> |
| <dt><span class="seeLabel">另请参阅:</span></dt> |
| <dd><a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getColumnOrigins-org.apache.calcite.rel.RelNode-int-"><code>getColumnOrigins(org.apache.calcite.rel.RelNode, int)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getExpressionLineage-org.apache.calcite.rel.RelNode-org.apache.calcite.rex.RexNode-"> |
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| <h4>getExpressionLineage</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a><<a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> getExpressionLineage(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> expression)</pre> |
| <div class="block">Determines the origin of a column.</div> |
| </li> |
| </ul> |
| <a name="getTableReferences-org.apache.calcite.rel.RelNode-"> |
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| <h4>getTableReferences</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a><<a href="../../../../../org/apache/calcite/rex/RexTableInputRef.RelTableRef.html" title="org.apache.calcite.rex中的类">RexTableInputRef.RelTableRef</a>> getTableReferences(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Determines the tables used by a plan.</div> |
| </li> |
| </ul> |
| <a name="getTableOrigin-org.apache.calcite.rel.RelNode-"> |
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| <h4>getTableOrigin</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a> getTableOrigin(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Determines the origin of a <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口"><code>RelNode</code></a>, provided it maps to a single |
| table, optionally with filtering and projection.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the RelNode</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>the table, if the RelNode is a simple table; otherwise null</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getSelectivity-org.apache.calcite.rel.RelNode-org.apache.calcite.rex.RexNode-"> |
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| <h4>getSelectivity</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> getSelectivity(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> predicate)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Selectivity.html#getSelectivity-org.apache.calcite.rex.RexNode-"><code>BuiltInMetadata.Selectivity.getSelectivity(RexNode)</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dd><code>predicate</code> - predicate whose selectivity is to be estimated against |
| <code>rel</code>'s output</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>estimated selectivity (between 0.0 and 1.0), or null if no |
| reliable estimate can be determined</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getUniqueKeys-org.apache.calcite.rel.RelNode-"> |
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| <h4>getUniqueKeys</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a><<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a>> getUniqueKeys(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.UniqueKeys.html#getUniqueKeys-boolean-"><code>BuiltInMetadata.UniqueKeys.getUniqueKeys(boolean)</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>set of keys, or null if this information cannot be determined |
| (whereas empty set indicates definitely no keys at all)</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getUniqueKeys-org.apache.calcite.rel.RelNode-boolean-"> |
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| <h4>getUniqueKeys</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="java.util中的类或接口">Set</a><<a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a>> getUniqueKeys(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| boolean ignoreNulls)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.UniqueKeys.html#getUniqueKeys-boolean-"><code>BuiltInMetadata.UniqueKeys.getUniqueKeys(boolean)</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dd><code>ignoreNulls</code> - if true, ignore null values when determining |
| whether the keys are unique</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>set of keys, or null if this information cannot be determined |
| (whereas empty set indicates definitely no keys at all)</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="areRowsUnique-org.apache.calcite.rel.RelNode-"> |
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| <h4>areRowsUnique</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="java.lang中的类或接口">Boolean</a> areRowsUnique(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns whether the rows of a given relational expression are distinct. |
| This is derived by applying the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.ColumnUniqueness.html#areColumnsUnique-org.apache.calcite.util.ImmutableBitSet-boolean-"><code>BuiltInMetadata.ColumnUniqueness.areColumnsUnique(org.apache.calcite.util.ImmutableBitSet, boolean)</code></a> |
| statistic over all columns.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>true or false depending on whether the rows are unique, or |
| null if not enough information is available to make that determination</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="areColumnsUnique-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-"> |
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| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="java.lang中的类或接口">Boolean</a> areColumnsUnique(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a> columns)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.ColumnUniqueness.html#areColumnsUnique-org.apache.calcite.util.ImmutableBitSet-boolean-"><code>BuiltInMetadata.ColumnUniqueness.areColumnsUnique(ImmutableBitSet, boolean)</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dd><code>columns</code> - column mask representing the subset of columns for which |
| uniqueness will be determined</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>true or false depending on whether the columns are unique, or |
| null if not enough information is available to make that determination</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="areColumnsUnique-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-boolean-"> |
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| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="java.lang中的类或接口">Boolean</a> areColumnsUnique(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a> columns, |
| boolean ignoreNulls)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.ColumnUniqueness.html#areColumnsUnique-org.apache.calcite.util.ImmutableBitSet-boolean-"><code>BuiltInMetadata.ColumnUniqueness.areColumnsUnique(ImmutableBitSet, boolean)</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dd><code>columns</code> - column mask representing the subset of columns for which |
| uniqueness will be determined</dd> |
| <dd><code>ignoreNulls</code> - if true, ignore null values when determining column |
| uniqueness</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>true or false depending on whether the columns are unique, or |
| null if not enough information is available to make that determination</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="collations-org.apache.calcite.rel.RelNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>collations</h4> |
| <pre>public com.google.common.collect.ImmutableList<<a href="../../../../../org/apache/calcite/rel/RelCollation.html" title="org.apache.calcite.rel中的接口">RelCollation</a>> collations(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Collation.html#collations--"><code>BuiltInMetadata.Collation.collations()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>List of sorted column combinations, or |
| null if not enough information is available to make that determination</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="distribution-org.apache.calcite.rel.RelNode-"> |
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| </a> |
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| <h4>distribution</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/rel/RelDistribution.html" title="org.apache.calcite.rel中的接口">RelDistribution</a> distribution(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Distribution.html#distribution--"><code>BuiltInMetadata.Distribution.distribution()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>List of sorted column combinations, or |
| null if not enough information is available to make that determination</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getPopulationSize-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-"> |
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| </a> |
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| <h4>getPopulationSize</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> getPopulationSize(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a> groupKey)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.PopulationSize.html#getPopulationSize-org.apache.calcite.util.ImmutableBitSet-"><code>BuiltInMetadata.PopulationSize.getPopulationSize(ImmutableBitSet)</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dd><code>groupKey</code> - column mask representing the subset of columns for which |
| the row count will be determined</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>distinct row count for the given groupKey, or null if no reliable |
| estimate can be determined</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getAverageRowSize-org.apache.calcite.rel.RelNode-"> |
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| </a> |
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| <h4>getAverageRowSize</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> getAverageRowSize(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Size.html#averageRowSize--"><code>BuiltInMetadata.Size.averageRowSize()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>average size of a row, in bytes, or null if not known</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getAverageColumnSizes-org.apache.calcite.rel.RelNode-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>getAverageColumnSizes</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>> getAverageColumnSizes(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Size.html#averageColumnSizes--"><code>BuiltInMetadata.Size.averageColumnSizes()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>a list containing, for each column, the average size of a column |
| value, in bytes. Each value or the entire list may be null if the |
| metadata is not available</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getAverageColumnSizesNotNull-org.apache.calcite.rel.RelNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getAverageColumnSizesNotNull</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a>> getAverageColumnSizesNotNull(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">As <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getAverageColumnSizes-org.apache.calcite.rel.RelNode-"><code>getAverageColumnSizes(org.apache.calcite.rel.RelNode)</code></a> but |
| never returns a null list, only ever a list of nulls.</div> |
| </li> |
| </ul> |
| <a name="isPhaseTransition-org.apache.calcite.rel.RelNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isPhaseTransition</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html?is-external=true" title="java.lang中的类或接口">Boolean</a> isPhaseTransition(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Parallelism.html#isPhaseTransition--"><code>BuiltInMetadata.Parallelism.isPhaseTransition()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>whether each physical operator implementing this relational |
| expression belongs to a different process than its inputs, or null if not |
| known</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="splitCount-org.apache.calcite.rel.RelNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>splitCount</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="java.lang中的类或接口">Integer</a> splitCount(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Parallelism.html#splitCount--"><code>BuiltInMetadata.Parallelism.splitCount()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>the number of distinct splits of the data, or null if not known</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="memory-org.apache.calcite.rel.RelNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>memory</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> memory(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Memory.html#memory--"><code>BuiltInMetadata.Memory.memory()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>the expected amount of memory, in bytes, required by a physical |
| operator implementing this relational expression, across all splits, |
| or null if not known</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="cumulativeMemoryWithinPhase-org.apache.calcite.rel.RelNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>cumulativeMemoryWithinPhase</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> cumulativeMemoryWithinPhase(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Memory.html#cumulativeMemoryWithinPhase--"><code>BuiltInMetadata.Memory.cumulativeMemoryWithinPhase()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>the cumulative amount of memory, in bytes, required by the |
| physical operator implementing this relational expression, and all other |
| operators within the same phase, across all splits, or null if not known</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="cumulativeMemoryWithinPhaseSplit-org.apache.calcite.rel.RelNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>cumulativeMemoryWithinPhaseSplit</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> cumulativeMemoryWithinPhaseSplit(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Memory.html#cumulativeMemoryWithinPhaseSplit--"><code>BuiltInMetadata.Memory.cumulativeMemoryWithinPhaseSplit()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>the expected cumulative amount of memory, in bytes, required by |
| the physical operator implementing this relational expression, and all |
| operators within the same phase, within each split, or null if not known</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getDistinctRowCount-org.apache.calcite.rel.RelNode-org.apache.calcite.util.ImmutableBitSet-org.apache.calcite.rex.RexNode-"> |
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| <h4>getDistinctRowCount</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="java.lang中的类或接口">Double</a> getDistinctRowCount(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/util/ImmutableBitSet.html" title="org.apache.calcite.util中的类">ImmutableBitSet</a> groupKey, |
| <a href="../../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> predicate)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.DistinctRowCount.html#getDistinctRowCount-org.apache.calcite.util.ImmutableBitSet-org.apache.calcite.rex.RexNode-"><code>BuiltInMetadata.DistinctRowCount.getDistinctRowCount(ImmutableBitSet, RexNode)</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dd><code>groupKey</code> - column mask representing group by columns</dd> |
| <dd><code>predicate</code> - pre-filtered predicates</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>distinct row count for groupKey, filtered by predicate, or null |
| if no reliable estimate can be determined</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getPulledUpPredicates-org.apache.calcite.rel.RelNode-"> |
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| <ul class="blockList"> |
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| <h4>getPulledUpPredicates</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/plan/RelOptPredicateList.html" title="org.apache.calcite.plan中的类">RelOptPredicateList</a> getPulledUpPredicates(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Predicates.html#getPredicates--"><code>BuiltInMetadata.Predicates.getPredicates()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>Predicates that can be pulled above this RelNode</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getAllPredicates-org.apache.calcite.rel.RelNode-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getAllPredicates</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/plan/RelOptPredicateList.html" title="org.apache.calcite.plan中的类">RelOptPredicateList</a> getAllPredicates(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.AllPredicates.html#getAllPredicates--"><code>BuiltInMetadata.AllPredicates.getAllPredicates()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>All predicates within and below this RelNode</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="isVisibleInExplain-org.apache.calcite.rel.RelNode-org.apache.calcite.sql.SqlExplainLevel-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isVisibleInExplain</h4> |
| <pre>public boolean isVisibleInExplain(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel, |
| <a href="../../../../../org/apache/calcite/sql/SqlExplainLevel.html" title="org.apache.calcite.sql中的枚举">SqlExplainLevel</a> explainLevel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.ExplainVisibility.html#isVisibleInExplain-org.apache.calcite.sql.SqlExplainLevel-"><code>BuiltInMetadata.ExplainVisibility.isVisibleInExplain(SqlExplainLevel)</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dd><code>explainLevel</code> - level of detail</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>true for visible, false for invisible; if no metadata is available, |
| defaults to true</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getDistribution-org.apache.calcite.rel.RelNode-"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getDistribution</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/rel/RelDistribution.html" title="org.apache.calcite.rel中的接口">RelDistribution</a> getDistribution(<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a> rel)</pre> |
| <div class="block">Returns the |
| <a href="../../../../../org/apache/calcite/rel/metadata/BuiltInMetadata.Distribution.html#distribution--"><code>BuiltInMetadata.Distribution.distribution()</code></a> |
| statistic.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>rel</code> - the relational expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>description of how the rows in the relational expression are |
| physically distributed</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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