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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.rel.core</a></div> |
| <h1 title="Class RepeatUnion" class="title">Class RepeatUnion</h1> |
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| <div class="inheritance">org.apache.calcite.rel.core.RepeatUnion</div> |
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| <section class="description"> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Cloneable.html?is-external=true" title="class or interface in java.lang" class="externalLink">Cloneable</a></code>, <code><a href="../../plan/RelOptNode.html" title="interface in org.apache.calcite.plan">RelOptNode</a></code>, <code><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd> |
| </dl> |
| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><code><a href="../../adapter/enumerable/EnumerableRepeatUnion.html" title="class in org.apache.calcite.adapter.enumerable">EnumerableRepeatUnion</a></code>, <code><a href="../logical/LogicalRepeatUnion.html" title="class in org.apache.calcite.rel.logical">LogicalRepeatUnion</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public abstract class <span class="typeNameLabel">RepeatUnion</span> |
| extends <a href="../BiRel.html" title="class in org.apache.calcite.rel">BiRel</a></pre> |
| <div class="block">Relational expression that computes a repeat union (recursive union in SQL |
| terminology). |
| |
| <p>This operation is executed as follows: |
| |
| <ul> |
| <li>Evaluate the left input (i.e., seed relational expression) once. For |
| UNION (but not UNION ALL), discard duplicated rows. |
| |
| <li>Evaluate the right input (i.e., iterative relational expression) over and |
| over until it produces no more results (or until an optional maximum number |
| of iterations is reached). For UNION (but not UNION ALL), discard |
| duplicated results. |
| </ul> |
| |
| <p>NOTE: The current API is experimental and subject to change without |
| notice.</div> |
| </section> |
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| <h2>Nested classes/interfaces inherited from interface org.apache.calcite.rel.<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></h2> |
| <a id="nested.classes.inherited.from.class.org.apache.calcite.rel.RelNode"> |
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| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#all">all</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Whether duplicates are considered.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#iterationLimit">iterationLimit</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Maximum number of times to repeat the iterative relational expression; |
| negative value means no limit, 0 means only seed will be evaluated.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <div class="inheritedList"> |
| <h3>Fields inherited from class org.apache.calcite.rel.<a href="../BiRel.html" title="class in org.apache.calcite.rel">BiRel</a></h3> |
| <a id="fields.inherited.from.class.org.apache.calcite.rel.BiRel"> |
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| </a><code><a href="../BiRel.html#left">left</a>, <a href="../BiRel.html#right">right</a></code></div> |
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| <h3>Fields inherited from class org.apache.calcite.rel.<a href="../AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></h3> |
| <a id="fields.inherited.from.class.org.apache.calcite.rel.AbstractRelNode"> |
| <!-- --> |
| </a><code><a href="../AbstractRelNode.html#digest">digest</a>, <a href="../AbstractRelNode.html#id">id</a>, <a href="../AbstractRelNode.html#rowType">rowType</a>, <a href="../AbstractRelNode.html#traitSet">traitSet</a></code></div> |
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| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Modifier</th> |
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| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected </code></td> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.calcite.plan.RelOptCluster,org.apache.calcite.plan.RelTraitSet,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,boolean,int)">RepeatUnion</a></span>​(<a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a> cluster, |
| <a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a> traitSet, |
| <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> seed, |
| <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> iterative, |
| boolean all, |
| int iterationLimit)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
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| </table> |
| </div> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
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| <td class="colFirst"><code>protected <a href="../type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#deriveRowType()">deriveRowType</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor" id="i1"> |
| <td class="colFirst"><code>double</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery)">estimateRowCount</a></span>​(<a href="../metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a> mq)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns an estimate of the number of rows this relational expression will |
| return.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i2"> |
| <td class="colFirst"><code><a href="../RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#explainTerms(org.apache.calcite.rel.RelWriter)">explainTerms</a></span>​(<a href="../RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> pw)</code></th> |
| <td class="colLast"> |
| <div class="block">Describes the inputs and attributes of this relational expression.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i3"> |
| <td class="colFirst"><code><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getIterativeRel()">getIterativeRel</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor" id="i4"> |
| <td class="colFirst"><code><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSeedRel()">getSeedRel</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="inheritedList"> |
| <h3>Methods inherited from class org.apache.calcite.rel.<a href="../BiRel.html" title="class in org.apache.calcite.rel">BiRel</a></h3> |
| <a id="methods.inherited.from.class.org.apache.calcite.rel.BiRel"> |
| <!-- --> |
| </a><code><a href="../BiRel.html#childrenAccept(org.apache.calcite.rel.RelVisitor)">childrenAccept</a>, <a href="../BiRel.html#getInputs()">getInputs</a>, <a href="../BiRel.html#getLeft()">getLeft</a>, <a href="../BiRel.html#getRight()">getRight</a>, <a href="../BiRel.html#replaceInput(int,org.apache.calcite.rel.RelNode)">replaceInput</a></code></div> |
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| <!-- --> |
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| <div class="inheritedList"> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></h3> |
| <a id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink">wait</a></code></div> |
| <div class="inheritedList"> |
| <h3>Methods inherited from interface org.apache.calcite.rel.<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></h3> |
| <a id="methods.inherited.from.class.org.apache.calcite.rel.RelNode"> |
| <!-- --> |
| </a><code><a href="../RelNode.html#explain()">explain</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
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| <h3><a id="all">all</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType">boolean</span> <span class="memberName">all</span></div> |
| <div class="block">Whether duplicates are considered.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="iterationLimit">iterationLimit</a></h3> |
| <div class="memberSignature"><span class="modifiers">public final</span> <span class="returnType">int</span> <span class="memberName">iterationLimit</span></div> |
| <div class="block">Maximum number of times to repeat the iterative relational expression; |
| negative value means no limit, 0 means only seed will be evaluated.</div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| <!-- --> |
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| <h2>Constructor Details</h2> |
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| <h3><a id="<init>(org.apache.calcite.plan.RelOptCluster,org.apache.calcite.plan.RelTraitSet,org.apache.calcite.rel.RelNode,org.apache.calcite.rel.RelNode,boolean,int)">RepeatUnion</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="memberName">RepeatUnion</span>​(<span class="arguments"><a href="../../plan/RelOptCluster.html" title="class in org.apache.calcite.plan">RelOptCluster</a> cluster, |
| <a href="../../plan/RelTraitSet.html" title="class in org.apache.calcite.plan">RelTraitSet</a> traitSet, |
| <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> seed, |
| <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> iterative, |
| boolean all, |
| int iterationLimit)</span></div> |
| </section> |
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| <!-- ============ METHOD DETAIL ========== --> |
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| <section class="detail"> |
| <h3><a id="estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery)">estimateRowCount</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">double</span> <span class="memberName">estimateRowCount</span>​(<span class="arguments"><a href="../metadata/RelMetadataQuery.html" title="class in org.apache.calcite.rel.metadata">RelMetadataQuery</a> mq)</span></div> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../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="../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="../RelNode.html#estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery)">estimateRowCount</a></code> in interface <code><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../AbstractRelNode.html#estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery)">estimateRowCount</a></code> in class <code><a href="../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> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="explainTerms(org.apache.calcite.rel.RelWriter)">explainTerms</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="../RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a></span> <span class="memberName">explainTerms</span>​(<span class="arguments"><a href="../RelWriter.html" title="interface in org.apache.calcite.rel">RelWriter</a> pw)</span></div> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../AbstractRelNode.html#explainTerms(org.apache.calcite.rel.RelWriter)">AbstractRelNode</a></code></span></div> |
| <div class="block">Describes the inputs and attributes of this relational expression. |
| Each node should call <code>super.explainTerms</code>, then call the |
| <a href="../RelWriter.html#input(java.lang.String,org.apache.calcite.rel.RelNode)"><code>RelWriter.input(String, RelNode)</code></a> |
| and |
| <a href="../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">Overrides:</span></dt> |
| <dd><code><a href="../BiRel.html#explainTerms(org.apache.calcite.rel.RelWriter)">explainTerms</a></code> in class <code><a href="../BiRel.html" title="class in org.apache.calcite.rel">BiRel</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>pw</code> - Plan writer</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Plan writer for fluent-explain pattern</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getSeedRel()">getSeedRel</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></span> <span class="memberName">getSeedRel</span>()</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getIterativeRel()">getIterativeRel</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></span> <span class="memberName">getIterativeRel</span>()</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="deriveRowType()">deriveRowType</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType"><a href="../type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></span> <span class="memberName">deriveRowType</span>()</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../AbstractRelNode.html#deriveRowType()">deriveRowType</a></code> in class <code><a href="../AbstractRelNode.html" title="class in org.apache.calcite.rel">AbstractRelNode</a></code></dd> |
| </dl> |
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