| <!DOCTYPE HTML> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc (17) --> |
| <title>SqlSplittableAggFunction.CountSplitter (Apache Calcite API)</title> |
| <meta name="viewport" content="width=device-width, initial-scale=1"> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| <meta name="description" content="declaration: package: org.apache.calcite.sql, interface: SqlSplittableAggFunction, class: CountSplitter"> |
| <meta name="generator" content="javadoc/ClassWriterImpl"> |
| <link rel="stylesheet" type="text/css" href="../../../../stylesheet.css" title="Style"> |
| <link rel="stylesheet" type="text/css" href="../../../../script-dir/jquery-ui.min.css" title="Style"> |
| <link rel="stylesheet" type="text/css" href="../../../../jquery-ui.overrides.css" title="Style"> |
| <script type="text/javascript" src="../../../../script.js"></script> |
| <script type="text/javascript" src="../../../../script-dir/jquery-3.5.1.min.js"></script> |
| <script type="text/javascript" src="../../../../script-dir/jquery-ui.min.js"></script> |
| </head> |
| <body class="class-declaration-page"> |
| <script type="text/javascript">var evenRowColor = "even-row-color"; |
| var oddRowColor = "odd-row-color"; |
| var tableTab = "table-tab"; |
| var activeTableTab = "active-table-tab"; |
| var pathtoroot = "../../../../"; |
| loadScripts(document, 'script');</script> |
| <noscript> |
| <div>JavaScript is disabled on your browser.</div> |
| </noscript> |
| <div class="flex-box"> |
| <header role="banner" class="flex-header"> |
| <nav role="navigation"> |
| <!-- ========= START OF TOP NAVBAR ======= --> |
| <div class="top-nav" id="navbar-top"> |
| <div class="skip-nav"><a href="#skip-navbar-top" title="Skip navigation links">Skip navigation links</a></div> |
| <div class="about-language"><b>Apache Calcite</b></div> |
| <ul id="navbar-top-firstrow" class="nav-list" title="Navigation"> |
| <li><a href="../../../../index.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="nav-bar-cell1-rev">Class</li> |
| <li><a href="package-tree.html">Tree</a></li> |
| <li><a href="../../../../deprecated-list.html">Deprecated</a></li> |
| <li><a href="../../../../index-all.html">Index</a></li> |
| <li><a href="../../../../help-doc.html#class">Help</a></li> |
| </ul> |
| </div> |
| <div class="sub-nav"> |
| <div> |
| <ul class="sub-nav-list"> |
| <li>Summary: </li> |
| <li><a href="#nested-class-summary">Nested</a> | </li> |
| <li><a href="#field-summary">Field</a> | </li> |
| <li><a href="#constructor-summary">Constr</a> | </li> |
| <li><a href="#method-summary">Method</a></li> |
| </ul> |
| <ul class="sub-nav-list"> |
| <li>Detail: </li> |
| <li><a href="#field-detail">Field</a> | </li> |
| <li><a href="#constructor-detail">Constr</a> | </li> |
| <li><a href="#method-detail">Method</a></li> |
| </ul> |
| </div> |
| <div class="nav-list-search"><label for="search-input">SEARCH:</label> |
| <input type="text" id="search-input" value="search" disabled="disabled"> |
| <input type="reset" id="reset-button" value="reset" disabled="disabled"> |
| </div> |
| </div> |
| <!-- ========= END OF TOP NAVBAR ========= --> |
| <span class="skip-nav" id="skip-navbar-top"></span></nav> |
| </header> |
| <div class="flex-content"> |
| <main role="main"> |
| <!-- ======== START OF CLASS DATA ======== --> |
| <div class="header"> |
| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.calcite.sql</a></div> |
| <h1 title="Class SqlSplittableAggFunction.CountSplitter" class="title">Class SqlSplittableAggFunction.CountSplitter</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.sql.SqlSplittableAggFunction.CountSplitter</div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></code></dd> |
| </dl> |
| <dl class="notes"> |
| <dt>Enclosing interface:</dt> |
| <dd><a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="modifiers">public static class </span><span class="element-name type-name-label">SqlSplittableAggFunction.CountSplitter</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> |
| implements <a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></span></div> |
| <div class="block">Splitting strategy for <code>COUNT</code>. |
| |
| <p>COUNT splits into itself followed by SUM. (Actually |
| SUM0, because the total needs to be 0, not null, if there are 0 rows.) |
| This rule works for any number of arguments to COUNT, including COUNT(*).</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="inherited-list"> |
| <h2 id="nested-classes-inherited-from-class-org.apache.calcite.sql.SqlSplittableAggFunction">Nested classes/interfaces inherited from interface org.apache.calcite.sql.<a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></h2> |
| <code><a href="SqlSplittableAggFunction.AbstractSumSplitter.html" title="class in org.apache.calcite.sql">SqlSplittableAggFunction.AbstractSumSplitter</a>, <a href="SqlSplittableAggFunction.CountSplitter.html" title="class in org.apache.calcite.sql">SqlSplittableAggFunction.CountSplitter</a>, <a href="SqlSplittableAggFunction.Registry.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction.Registry</a><<a href="SqlSplittableAggFunction.Registry.html" title="type parameter in SqlSplittableAggFunction.Registry">E</a>>, <a href="SqlSplittableAggFunction.SelfSplitter.html" title="class in org.apache.calcite.sql">SqlSplittableAggFunction.SelfSplitter</a>, <a href="SqlSplittableAggFunction.Sum0Splitter.html" title="class in org.apache.calcite.sql">SqlSplittableAggFunction.Sum0Splitter</a>, <a href="SqlSplittableAggFunction.SumSplitter.html" title="class in org.apache.calcite.sql">SqlSplittableAggFunction.SumSplitter</a></code></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>static final <a href="SqlSplittableAggFunction.CountSplitter.html" title="class in org.apache.calcite.sql">SqlSplittableAggFunction.CountSplitter</a></code></div> |
| <div class="col-second even-row-color"><code><a href="#INSTANCE" class="member-name-link">INSTANCE</a></code></div> |
| <div class="col-last even-row-color"> </div> |
| </div> |
| </section> |
| </li> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <li> |
| <section class="constructor-summary" id="constructor-summary"> |
| <h2>Constructor Summary</h2> |
| <div class="caption"><span>Constructors</span></div> |
| <div class="summary-table two-column-summary"> |
| <div class="table-header col-first">Constructor</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">CountSplitter</a>()</code></div> |
| <div class="col-last even-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>@Nullable <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#merge(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.rel.core.AggregateCall)" class="member-name-link">merge</a><wbr>(<a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> top, |
| <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> bottom)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Merge top and bottom aggregate calls into a single aggregate call, |
| if they are legit to merge.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>@Nullable <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#other(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.core.AggregateCall)" class="member-name-link">other</a><wbr>(<a href="../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a> typeFactory, |
| <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> e)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Called to generate an aggregate for the other side of the join |
| than the side aggregate call's arguments come from.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#singleton(org.apache.calcite.rex.RexBuilder,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.AggregateCall)" class="member-name-link">singleton</a><wbr>(<a href="../rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputRowType, |
| <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> aggregateCall)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Generates an expression for the value of the aggregate function when |
| applied to a single row.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#split(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.util.mapping.Mappings.TargetMapping)" class="member-name-link">split</a><wbr>(<a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> aggregateCall, |
| <a href="../util/mapping/Mappings.TargetMapping.html" title="interface in org.apache.calcite.util.mapping">Mappings.TargetMapping</a> mapping)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#topSplit(org.apache.calcite.rex.RexBuilder,org.apache.calcite.sql.SqlSplittableAggFunction.Registry,int,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.AggregateCall,int,int)" class="member-name-link">topSplit</a><wbr>(<a href="../rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| <a href="SqlSplittableAggFunction.Registry.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction.Registry</a><<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> extra, |
| int offset, |
| <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputRowType, |
| <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> aggregateCall, |
| int leftSubTotal, |
| int rightSubTotal)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Generates an aggregate call to merge sub-totals.</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="INSTANCE"> |
| <h3>INSTANCE</h3> |
| <div class="member-signature"><span class="modifiers">public static final</span> <span class="return-type"><a href="SqlSplittableAggFunction.CountSplitter.html" title="class in org.apache.calcite.sql">SqlSplittableAggFunction.CountSplitter</a></span> <span class="element-name">INSTANCE</span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li> |
| <section class="constructor-details" id="constructor-detail"> |
| <h2>Constructor Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="<init>()"> |
| <h3>CountSplitter</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="element-name">CountSplitter</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="split(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.util.mapping.Mappings.TargetMapping)"> |
| <h3>split</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></span> <span class="element-name">split</span><wbr><span class="parameters">(<a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> aggregateCall, |
| <a href="../util/mapping/Mappings.TargetMapping.html" title="interface in org.apache.calcite.util.mapping">Mappings.TargetMapping</a> mapping)</span></div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="SqlSplittableAggFunction.html#split(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.util.mapping.Mappings.TargetMapping)">split</a></code> in interface <code><a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="other(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.core.AggregateCall)"> |
| <h3>other</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">@Nullable <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></span> <span class="element-name">other</span><wbr><span class="parameters">(<a href="../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a> typeFactory, |
| <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> e)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="SqlSplittableAggFunction.html#other(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.core.AggregateCall)">SqlSplittableAggFunction</a></code></span></div> |
| <div class="block">Called to generate an aggregate for the other side of the join |
| than the side aggregate call's arguments come from. Returns null if |
| no aggregate is required.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="SqlSplittableAggFunction.html#other(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.core.AggregateCall)">other</a></code> in interface <code><a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="topSplit(org.apache.calcite.rex.RexBuilder,org.apache.calcite.sql.SqlSplittableAggFunction.Registry,int,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.AggregateCall,int,int)"> |
| <h3>topSplit</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></span> <span class="element-name">topSplit</span><wbr><span class="parameters">(<a href="../rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| <a href="SqlSplittableAggFunction.Registry.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction.Registry</a><<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> extra, |
| int offset, |
| <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputRowType, |
| <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> aggregateCall, |
| int leftSubTotal, |
| int rightSubTotal)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="SqlSplittableAggFunction.html#topSplit(org.apache.calcite.rex.RexBuilder,org.apache.calcite.sql.SqlSplittableAggFunction.Registry,int,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.AggregateCall,int,int)">SqlSplittableAggFunction</a></code></span></div> |
| <div class="block">Generates an aggregate call to merge sub-totals. |
| |
| <p>Most implementations will add a single aggregate call to |
| <code>aggCalls</code>, and return a <a href="../rex/RexInputRef.html" title="class in org.apache.calcite.rex"><code>RexInputRef</code></a> that points to it.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="SqlSplittableAggFunction.html#topSplit(org.apache.calcite.rex.RexBuilder,org.apache.calcite.sql.SqlSplittableAggFunction.Registry,int,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.AggregateCall,int,int)">topSplit</a></code> in interface <code><a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></code></dd> |
| <dt>Parameters:</dt> |
| <dd><code>rexBuilder</code> - Rex builder</dd> |
| <dd><code>extra</code> - Place to define extra input expressions</dd> |
| <dd><code>offset</code> - Offset due to grouping columns (and indicator columns if |
| applicable)</dd> |
| <dd><code>inputRowType</code> - Input row type</dd> |
| <dd><code>aggregateCall</code> - Source aggregate call</dd> |
| <dd><code>leftSubTotal</code> - Ordinal of the sub-total coming from the left side of |
| the join, or -1 if there is no such sub-total</dd> |
| <dd><code>rightSubTotal</code> - Ordinal of the sub-total coming from the right side |
| of the join, or -1 if there is no such sub-total</dd> |
| <dt>Returns:</dt> |
| <dd>Aggregate call</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="singleton(org.apache.calcite.rex.RexBuilder,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.AggregateCall)"> |
| <h3>singleton</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="element-name">singleton</span><wbr><span class="parameters">(<a href="../rex/RexBuilder.html" title="class in org.apache.calcite.rex">RexBuilder</a> rexBuilder, |
| <a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> inputRowType, |
| <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> aggregateCall)</span></div> |
| <div class="block">Generates an expression for the value of the aggregate function when |
| applied to a single row. |
| |
| <p>For example, if there is one row: |
| <ul> |
| <li><code>SUM(x)</code> is <code>x</code> |
| <li><code>MIN(x)</code> is <code>x</code> |
| <li><code>MAX(x)</code> is <code>x</code> |
| <li><code>COUNT(x)</code> is <code>CASE WHEN x IS NOT NULL THEN 1 ELSE 0 END 1</code> |
| which can be simplified to <code>1</code> if <code>x</code> is never null |
| <li><code>COUNT(*)</code> is 1 |
| </ul> |
| |
| <p><code>COUNT(*)</code>, and <code>COUNT</code> applied to all NOT NULL arguments, |
| become <code>1</code>; otherwise |
| <code>CASE WHEN arg0 IS NOT NULL THEN 1 ELSE 0 END</code>.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="SqlSplittableAggFunction.html#singleton(org.apache.calcite.rex.RexBuilder,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.AggregateCall)">singleton</a></code> in interface <code><a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></code></dd> |
| <dt>Parameters:</dt> |
| <dd><code>rexBuilder</code> - Rex builder</dd> |
| <dd><code>inputRowType</code> - Input row type</dd> |
| <dd><code>aggregateCall</code> - Aggregate call</dd> |
| <dt>Returns:</dt> |
| <dd>Expression for single row</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="merge(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.rel.core.AggregateCall)"> |
| <h3>merge</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">@Nullable <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></span> <span class="element-name">merge</span><wbr><span class="parameters">(<a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> top, |
| <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a> bottom)</span></div> |
| <div class="block"><span class="descfrm-type-label">Description copied from interface: <code><a href="SqlSplittableAggFunction.html#merge(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.rel.core.AggregateCall)">SqlSplittableAggFunction</a></code></span></div> |
| <div class="block">Merge top and bottom aggregate calls into a single aggregate call, |
| if they are legit to merge. |
| |
| <p>SUM of SUM becomes SUM; SUM of COUNT becomes COUNT; |
| MAX of MAX becomes MAX; MIN of MIN becomes MIN. |
| AVG of AVG would not match, nor would COUNT of COUNT.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="SqlSplittableAggFunction.html#merge(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.rel.core.AggregateCall)">merge</a></code> in interface <code><a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></code></dd> |
| <dt>Parameters:</dt> |
| <dd><code>top</code> - top aggregate call</dd> |
| <dd><code>bottom</code> - bottom aggregate call</dd> |
| <dt>Returns:</dt> |
| <dd>Merged aggregate call, null if fails to merge aggregate calls</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <!-- ========= END OF CLASS DATA ========= --> |
| </main> |
| <footer role="contentinfo"> |
| <hr> |
| <p class="legal-copy"><small>Copyright © 2012-2023 Apache Software Foundation. All Rights Reserved.</small></p> |
| </footer> |
| </div> |
| </div> |
| </body> |
| </html> |
