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| <li>Summary: </li> |
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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.calcite.rel.rules</a></div> |
| <h1 title="Class CalcRelSplitter" class="title">Class CalcRelSplitter</h1> |
| </div> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a> |
| <div class="inheritance">org.apache.calcite.rel.rules.CalcRelSplitter</div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <hr> |
| <div class="type-signature"><span class="modifiers">public abstract class </span><span class="element-name type-name-label">CalcRelSplitter</span> |
| <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span></div> |
| <div class="block">CalcRelSplitter operates on a |
| <a href="../core/Calc.html" title="class in org.apache.calcite.rel.core"><code>Calc</code></a> with multiple <a href="../../rex/RexCall.html" title="class in org.apache.calcite.rex"><code>RexCall</code></a> |
| sub-expressions that cannot all be implemented by a single concrete |
| <a href="../RelNode.html" title="interface in org.apache.calcite.rel"><code>RelNode</code></a>. |
| |
| <p>For example, the Java and Fennel calculator do not implement an identical |
| set of operators. The Calc can be used to split a single Calc with |
| mixed Java- and Fennel-only operators into a tree of Calc object that can |
| each be individually implemented by either Java or Fennel.and splits it into |
| several Calc instances. |
| |
| <p>Currently the splitter is only capable of handling two "rel types". That |
| is, it can deal with Java vs. Fennel Calcs, but not Java vs. Fennel vs. |
| some other type of Calc. |
| |
| <p>See <a href="ProjectToWindowRule.html" title="class in org.apache.calcite.rel.rules"><code>ProjectToWindowRule</code></a> |
| for an example of how this class is used.</div> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- ======== NESTED CLASS SUMMARY ======== --> |
| <li> |
| <section class="nested-class-summary" id="nested-class-summary"> |
| <h2>Nested Class Summary</h2> |
| <div class="caption"><span>Nested Classes</span></div> |
| <div class="summary-table three-column-summary"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Class</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>static class </code></div> |
| <div class="col-second even-row-color"><code><a href="CalcRelSplitter.RelType.html" class="type-name-link" title="class in org.apache.calcite.rel.rules">CalcRelSplitter.RelType</a></code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">Type of relational expression.</div> |
| </div> |
| </div> |
| </section> |
| </li> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <li> |
| <section class="field-summary" id="field-summary"> |
| <h2>Field Summary</h2> |
| <div class="caption"><span>Fields</span></div> |
| <div class="summary-table three-column-summary"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Field</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>protected final <a href="../../rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a></code></div> |
| <div class="col-second even-row-color"><code><a href="#program" class="member-name-link">program</a></code></div> |
| <div class="col-last even-row-color"> </div> |
| <div class="col-first odd-row-color"><code>protected final <a href="../../tools/RelBuilder.html" title="class in org.apache.calcite.tools">RelBuilder</a></code></div> |
| <div class="col-second odd-row-color"><code><a href="#relBuilder" class="member-name-link">relBuilder</a></code></div> |
| <div class="col-last odd-row-color"> </div> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <li> |
| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
| <div id="method-summary-table"> |
| <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div> |
| <div id="method-summary-table.tabpanel" role="tabpanel"> |
| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected boolean</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#canImplement(org.apache.calcite.rel.logical.LogicalCalc,java.lang.String)" class="member-name-link">canImplement</a><wbr>(<a href="../logical/LogicalCalc.html" title="class in org.apache.calcite.rel.logical">LogicalCalc</a> rel, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> relTypeName)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Returns whether a relational expression can be implemented solely in a |
| given <a href="CalcRelSplitter.RelType.html" title="class in org.apache.calcite.rel.rules"><code>CalcRelSplitter.RelType</code></a>.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Integer.html" title="class or interface in java.lang" class="external-link">Integer</a>>></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getCohorts()" class="member-name-link">getCohorts</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Returns a list of sets of expressions that should be on the same level.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>protected <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#handle(org.apache.calcite.rel.RelNode)" class="member-name-link">handle</a><wbr>(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Opportunity to further refine the relational expression created for a |
| given level.</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3> |
| <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <li> |
| <section class="field-details" id="field-detail"> |
| <h2>Field Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="program"> |
| <h3>program</h3> |
| <div class="member-signature"><span class="modifiers">protected final</span> <span class="return-type"><a href="../../rex/RexProgram.html" title="class in org.apache.calcite.rex">RexProgram</a></span> <span class="element-name">program</span></div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="relBuilder"> |
| <h3>relBuilder</h3> |
| <div class="member-signature"><span class="modifiers">protected final</span> <span class="return-type"><a href="../../tools/RelBuilder.html" title="class in org.apache.calcite.tools">RelBuilder</a></span> <span class="element-name">relBuilder</span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="handle(org.apache.calcite.rel.RelNode)"> |
| <h3>handle</h3> |
| <div class="member-signature"><span class="modifiers">protected</span> <span class="return-type"><a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a></span> <span class="element-name">handle</span><wbr><span class="parameters">(<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a> rel)</span></div> |
| <div class="block">Opportunity to further refine the relational expression created for a |
| given level. The default implementation returns the relational expression |
| unchanged.</div> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="canImplement(org.apache.calcite.rel.logical.LogicalCalc,java.lang.String)"> |
| <h3>canImplement</h3> |
| <div class="member-signature"><span class="modifiers">protected</span> <span class="return-type">boolean</span> <span class="element-name">canImplement</span><wbr><span class="parameters">(<a href="../logical/LogicalCalc.html" title="class in org.apache.calcite.rel.logical">LogicalCalc</a> rel, |
| <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a> relTypeName)</span></div> |
| <div class="block">Returns whether a relational expression can be implemented solely in a |
| given <a href="CalcRelSplitter.RelType.html" title="class in org.apache.calcite.rel.rules"><code>CalcRelSplitter.RelType</code></a>.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>rel</code> - Calculation relational expression</dd> |
| <dd><code>relTypeName</code> - Name of a <a href="CalcRelSplitter.RelType.html" title="class in org.apache.calcite.rel.rules"><code>CalcRelSplitter.RelType</code></a></dd> |
| <dt>Returns:</dt> |
| <dd>Whether relational expression can be implemented</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getCohorts()"> |
| <h3>getCohorts</h3> |
| <div class="member-signature"><span class="modifiers">protected</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/Set.html" title="class or interface in java.util" class="external-link">Set</a><<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Integer.html" title="class or interface in java.lang" class="external-link">Integer</a>>></span> <span class="element-name">getCohorts</span>()</div> |
| <div class="block">Returns a list of sets of expressions that should be on the same level. |
| |
| <p>For example, if this method returns { {3, 5}, {4, 7} }, it means that |
| expressions 3 and 5, should be on the same level, and expressions 4 and 7 |
| should be on the same level. The two cohorts do not need to be on the |
| same level. |
| |
| <p>The list is best effort. If it is not possible to arrange that the |
| expressions in a cohort are on the same level, the <code>execute()</code> |
| method will still succeed. |
| |
| <p>The default implementation of this method returns the empty list; |
| expressions will be put on the most suitable level. This is generally |
| the lowest possible level, except for literals, which are placed at the |
| level where they are used.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>List of cohorts, that is sets of expressions, that the splitting |
| algorithm should attempt to place on the same level</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
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