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| <h2 title="Class HepRelVertex" class="title">Class HepRelVertex</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">org.apache.calcite.rel.AbstractRelNode</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.plan.hep.HepRelVertex</li> |
| </ul> |
| </li> |
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| </li> |
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| <div class="description"> |
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| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html?is-external=true" title="class or interface in java.lang">Cloneable</a>, <a href="../../../../../org/apache/calcite/plan/RelOptNode.html" title="interface in org.apache.calcite.plan">RelOptNode</a>, <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>public class <span class="typeNameLabel">HepRelVertex</span> |
| extends <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></pre> |
| <div class="block">HepRelVertex wraps a real <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel"><code>RelNode</code></a> as a vertex in a DAG representing |
| the entire query expression.</div> |
| </li> |
| </ul> |
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| <li class="blockList"><a name="nested.classes.inherited.from.class.org.apache.calcite.rel.RelNode"> |
| <!-- --> |
| </a> |
| <h3>Nested classes/interfaces inherited from interface org.apache.calcite.rel.<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></h3> |
| <code><a href="../../../../../org/apache/calcite/rel/RelNode.Context.html" title="interface in org.apache.calcite.rel">RelNode.Context</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| <!-- =========== FIELD SUMMARY =========== --> |
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| <h3>Field Summary</h3> |
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| <!-- --> |
| </a> |
| <h3>Fields inherited from class org.apache.calcite.rel.<a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></h3> |
| <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#digest">digest</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#id">id</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#rowType">rowType</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#traitSet">traitSet</a></code></li> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/plan/RelOptCost.html" title="interface in org.apache.calcite.plan">RelOptCost</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/hep/HepRelVertex.html#computeSelfCost-org.apache.calcite.plan.RelOptPlanner-org.apache.calcite.rel.metadata.RelMetadataQuery-">computeSelfCost</a></span>(<a href="../../../../../org/apache/calcite/plan/RelOptPlanner.html" title="interface in org.apache.calcite.plan">RelOptPlanner</a> planner, |
| <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a> mq)</code> |
| <div class="block">Returns the cost of this plan (not including children).</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/hep/HepRelVertex.html#copy-org.apache.calcite.plan.RelTraitSet-java.util.List-">copy</a></span>(<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a> traitSet, |
| <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><<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>> inputs)</code> |
| <div class="block">Creates a copy of this relational expression, perhaps changing traits and |
| inputs.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/hep/HepRelVertex.html#deriveRowType--">deriveRowType</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/hep/HepRelVertex.html#digestEquals-java.lang.Object-">digestEquals</a></span>(<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> obj)</code> |
| <div class="block">Equality check for RelNode digest.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/hep/HepRelVertex.html#digestHash--">digestHash</a></span>()</code> |
| <div class="block">Compute hash code for RelNode digest.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/hep/HepRelVertex.html#estimateRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-">estimateRowCount</a></span>(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a> mq)</code> |
| <div class="block">Returns an estimate of the number of rows this relational expression will |
| return.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/hep/HepRelVertex.html#explain-org.apache.calcite.rel.RelWriter-">explain</a></span>(<a href="../../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> pw)</code> |
| <div class="block">Describes the inputs and attributes of this relational expression.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/hep/HepRelVertex.html#getCurrentRel--">getCurrentRel</a></span>()</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/plan/hep/HepRelVertex.html#getDigest--">getDigest</a></span>()</code> |
| <div class="block">Returns a string which concisely describes the definition of this |
| relational expression.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
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| </a> |
| <h3>Methods inherited from class org.apache.calcite.rel.<a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></h3> |
| <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#accept-org.apache.calcite.rel.RelShuttle-">accept</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#accept-org.apache.calcite.rex.RexShuttle-">accept</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#childrenAccept-org.apache.calcite.rel.RelVisitor-">childrenAccept</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#collectVariablesSet-java.util.Set-">collectVariablesSet</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#collectVariablesUsed-java.util.Set-">collectVariablesUsed</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#computeSelfCost-org.apache.calcite.plan.RelOptPlanner-">computeSelfCost</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#equals-java.lang.Object-">equals</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#explainTerms-org.apache.calcite.rel.RelWriter-">explainTerms</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getChildExps--">getChildExps</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getCluster--">getCluster</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getCollationList--">getCollationList</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getConvention--">getConvention</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getCorrelVariable--">getCorrelVariable</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getDescription--">getDescription</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getExpectedInputRowType-int-">getExpectedInputRowType</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getId--">getId</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getInput-int-">getInput</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getInputs--">getInputs</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getQuery--">getQuery</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getRelDigest--">getRelDigest</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getRelTypeName--">getRelTypeName</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getRows--">getRows</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getRowType--">getRowType</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getTable--">getTable</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getTraitSet--">getTraitSet</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getVariablesSet--">getVariablesSet</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getVariablesStopped--">getVariablesStopped</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#hashCode--">hashCode</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#isDistinct--">isDistinct</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#isEnforcer--">isEnforcer</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#isKey-org.apache.calcite.util.ImmutableBitSet-">isKey</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#isValid-boolean-">isValid</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#isValid-org.apache.calcite.util.Litmus-org.apache.calcite.rel.RelNode.Context-">isValid</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#metadata-java.lang.Class-org.apache.calcite.rel.metadata.RelMetadataQuery-">metadata</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#onRegister-org.apache.calcite.plan.RelOptPlanner-">onRegister</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#recomputeDigest--">recomputeDigest</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#register-org.apache.calcite.plan.RelOptPlanner-">register</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#replaceInput-int-org.apache.calcite.rel.RelNode-">replaceInput</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#sole-java.util.List-">sole</a>, <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#toString--">toString</a></code></li> |
| </ul> |
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| </a> |
| <h3>Methods inherited from class java.lang.<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></h3> |
| <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#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#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#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> |
| </ul> |
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| <!-- ============ METHOD DETAIL ========== --> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="explain-org.apache.calcite.rel.RelWriter-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>explain</h4> |
| <pre>public void explain(<a href="../../../../../org/apache/calcite/rel/RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> pw)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/calcite/rel/RelNode.html#explain-org.apache.calcite.rel.RelWriter-">RelNode</a></code></span></div> |
| <div class="block">Describes the inputs and attributes of this relational expression. |
| Each node should call <code>super.explain</code>, then call the |
| <a href="../../../../../org/apache/calcite/rel/RelWriter.html#input-java.lang.String-org.apache.calcite.rel.RelNode-"><code>RelWriter.input(String, RelNode)</code></a> |
| and |
| <a href="../../../../../org/apache/calcite/rel/externalize/RelWriterImpl.html#item-java.lang.String-java.lang.Object-"><code>RelWriterImpl.item(String, Object)</code></a> |
| methods for each input and attribute.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#explain-org.apache.calcite.rel.RelWriter-">explain</a></code> in interface <code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#explain-org.apache.calcite.rel.RelWriter-">explain</a></code> in class <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>pw</code> - Plan writer</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="copy-org.apache.calcite.plan.RelTraitSet-java.util.List-"> |
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| </a> |
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| <h4>copy</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> copy(<a href="../../../../../org/apache/calcite/plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a> traitSet, |
| <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><<a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>> inputs)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/calcite/rel/RelNode.html#copy-org.apache.calcite.plan.RelTraitSet-java.util.List-">RelNode</a></code></span></div> |
| <div class="block">Creates a copy of this relational expression, perhaps changing traits and |
| inputs. |
| |
| <p>Sub-classes with other important attributes are encouraged to create |
| variants of this method with more parameters.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#copy-org.apache.calcite.plan.RelTraitSet-java.util.List-">copy</a></code> in interface <code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#copy-org.apache.calcite.plan.RelTraitSet-java.util.List-">copy</a></code> in class <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>traitSet</code> - Trait set</dd> |
| <dd><code>inputs</code> - Inputs</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Copy of this relational expression, substituting traits and |
| inputs</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="computeSelfCost-org.apache.calcite.plan.RelOptPlanner-org.apache.calcite.rel.metadata.RelMetadataQuery-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>computeSelfCost</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/plan/RelOptCost.html" title="interface in org.apache.calcite.plan">RelOptCost</a> computeSelfCost(<a href="../../../../../org/apache/calcite/plan/RelOptPlanner.html" title="interface in org.apache.calcite.plan">RelOptPlanner</a> planner, |
| <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a> mq)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/calcite/rel/RelNode.html#computeSelfCost-org.apache.calcite.plan.RelOptPlanner-org.apache.calcite.rel.metadata.RelMetadataQuery-">RelNode</a></code></span></div> |
| <div class="block">Returns the cost of this plan (not including children). The base |
| implementation throws an error; derived classes should override. |
| |
| <p>NOTE jvs 29-Mar-2006: Don't call this method directly. Instead, use |
| <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getNonCumulativeCost-org.apache.calcite.rel.RelNode-"><code>RelMetadataQuery.getNonCumulativeCost(org.apache.calcite.rel.RelNode)</code></a>, which gives plugins a |
| chance to override the rel's default ideas about cost.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#computeSelfCost-org.apache.calcite.plan.RelOptPlanner-org.apache.calcite.rel.metadata.RelMetadataQuery-">computeSelfCost</a></code> in interface <code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#computeSelfCost-org.apache.calcite.plan.RelOptPlanner-org.apache.calcite.rel.metadata.RelMetadataQuery-">computeSelfCost</a></code> in class <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>planner</code> - Planner for cost calculation</dd> |
| <dd><code>mq</code> - Metadata query</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Cost of this plan (not including children)</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="estimateRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>estimateRowCount</h4> |
| <pre>public double estimateRowCount(<a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a> mq)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/calcite/rel/RelNode.html#estimateRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-">RelNode</a></code></span></div> |
| <div class="block">Returns an estimate of the number of rows this relational expression will |
| return. |
| |
| <p>NOTE jvs 29-Mar-2006: Don't call this method directly. Instead, use |
| <a href="../../../../../org/apache/calcite/rel/metadata/RelMetadataQuery.html#getRowCount-org.apache.calcite.rel.RelNode-"><code>RelMetadataQuery.getRowCount(org.apache.calcite.rel.RelNode)</code></a>, which gives plugins a chance to |
| override the rel's default ideas about row count.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#estimateRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-">estimateRowCount</a></code> in interface <code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#estimateRowCount-org.apache.calcite.rel.metadata.RelMetadataQuery-">estimateRowCount</a></code> in class <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>mq</code> - Metadata query</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Estimate of the number of rows this relational expression will |
| return</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="deriveRowType--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>deriveRowType</h4> |
| <pre>protected <a href="../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> deriveRowType()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#deriveRowType--">deriveRowType</a></code> in class <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getCurrentRel--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getCurrentRel</h4> |
| <pre>public <a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> getCurrentRel()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>current implementation chosen for this vertex</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="digestEquals-java.lang.Object-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>digestEquals</h4> |
| <pre>protected boolean digestEquals(<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> obj)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#digestEquals-java.lang.Object-">AbstractRelNode</a></code></span></div> |
| <div class="block">Equality check for RelNode digest. |
| |
| <p>By default this method collects digest attributes from |
| <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#explainTerms-org.apache.calcite.rel.RelWriter-"><code>AbstractRelNode.explainTerms(RelWriter)</code></a>, then compares each attribute pair. |
| This should work well for most cases. If this method is a performance |
| bottleneck for your project, or the default behavior can't handle |
| your scenario properly, you can choose to override this method and |
| <a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#digestHash--"><code>AbstractRelNode.digestHash()</code></a>. See <code>LogicalJoin</code> as an example.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#digestEquals-java.lang.Object-">digestEquals</a></code> in class <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Whether the 2 RelNodes are equivalent or have the same digest.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#digestHash--"><code>AbstractRelNode.digestHash()</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="digestHash--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>digestHash</h4> |
| <pre>protected int digestHash()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#digestHash--">AbstractRelNode</a></code></span></div> |
| <div class="block">Compute hash code for RelNode digest.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#digestHash--">digestHash</a></code> in class <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code></dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#digestEquals-java.lang.Object-"><code>AbstractRelNode.digestEquals(Object)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getDigest--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getDigest</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> getDigest()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/calcite/plan/RelOptNode.html#getDigest--">RelOptNode</a></code></span></div> |
| <div class="block">Returns a string which concisely describes the definition of this |
| relational expression. Two relational expressions are equivalent if |
| their digests and <a href="../../../../../org/apache/calcite/plan/RelOptNode.html#getRowType--"><code>RelOptNode.getRowType()</code></a> (except the field names) are the same. |
| |
| <p>The digest does not contain the relational expression's identity -- |
| that would prevent similar relational expressions from ever comparing |
| equal -- but does include the identity of children (on the assumption |
| that children have already been normalized). |
| |
| <p>If you want a descriptive string which contains the identity, call |
| <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"><code>Object.toString()</code></a>, which always returns "rel#{id}:{digest}".</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/plan/RelOptNode.html#getDigest--">getDigest</a></code> in interface <code><a href="../../../../../org/apache/calcite/plan/RelOptNode.html" title="interface in org.apache.calcite.plan">RelOptNode</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/RelNode.html#getDigest--">getDigest</a></code> in interface <code><a href="../../../../../org/apache/calcite/rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html#getDigest--">getDigest</a></code> in class <code><a href="../../../../../org/apache/calcite/rel/AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Digest string of this <code>RelNode</code></dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
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