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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.sql</a></div> |
| <h1 title="Class SqlSplittableAggFunction.AbstractSumSplitter" class="title">Class SqlSplittableAggFunction.AbstractSumSplitter</h1> |
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| <div class="inheritance">org.apache.calcite.sql.SqlSplittableAggFunction.AbstractSumSplitter</div> |
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| <section class="description"> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></code></dd> |
| </dl> |
| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><code><a href="SqlSplittableAggFunction.Sum0Splitter.html" title="class in org.apache.calcite.sql">SqlSplittableAggFunction.Sum0Splitter</a></code>, <code><a href="SqlSplittableAggFunction.SumSplitter.html" title="class in org.apache.calcite.sql">SqlSplittableAggFunction.SumSplitter</a></code></dd> |
| </dl> |
| <dl> |
| <dt>Enclosing interface:</dt> |
| <dd><a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></dd> |
| </dl> |
| <hr> |
| <pre>public abstract static class <span class="typeNameLabel">SqlSplittableAggFunction.AbstractSumSplitter</span> |
| extends <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> |
| implements <a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></pre> |
| <div class="block">Common splitting strategy for <code>SUM</code> and <code>SUM0</code> functions.</div> |
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| <h2>Nested Class Summary</h2> |
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| <h2>Nested classes/interfaces inherited from interface org.apache.calcite.sql.<a href="SqlSplittableAggFunction.html" title="interface in org.apache.calcite.sql">SqlSplittableAggFunction</a></h2> |
| <a id="nested.classes.inherited.from.class.org.apache.calcite.sql.SqlSplittableAggFunction"> |
| <!-- --> |
| </a><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> |
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| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">AbstractSumSplitter</a></span>()</code></th> |
| <td class="colLast"> </td> |
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| <td class="colFirst"><code>protected abstract <a href="SqlAggFunction.html" title="class in org.apache.calcite.sql">SqlAggFunction</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getMergeAggFunctionOfTopSplit()">getMergeAggFunctionOfTopSplit</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor" id="i1"> |
| <td class="colFirst"><code>@Nullable <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#merge(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.rel.core.AggregateCall)">merge</a></span>​(<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></th> |
| <td class="colLast"> |
| <div class="block">Merge top and bottom aggregate calls into a single aggregate call, |
| if they are legit to merge.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i2"> |
| <td class="colFirst"><code>@Nullable <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#other(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.core.AggregateCall)">other</a></span>​(<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></th> |
| <td class="colLast"> |
| <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> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i3"> |
| <td class="colFirst"><code><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#singleton(org.apache.calcite.rex.RexBuilder,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.AggregateCall)">singleton</a></span>​(<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></th> |
| <td class="colLast"> |
| <div class="block">Generates an expression for the value of the aggregate function when |
| applied to a single row.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i4"> |
| <td class="colFirst"><code><a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#split(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.util.mapping.Mappings.TargetMapping)">split</a></span>​(<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></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor" id="i5"> |
| <td class="colFirst"><code><a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><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)">topSplit</a></span>​(<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></th> |
| <td class="colLast"> |
| <div class="block">Generates an aggregate call to merge sub-totals.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <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> |
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| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| <h3><a id="<init>()">AbstractSumSplitter</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="memberName">AbstractSumSplitter</span>()</div> |
| </section> |
| </li> |
| </ul> |
| </section> |
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| <h3><a id="singleton(org.apache.calcite.rex.RexBuilder,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.AggregateCall)">singleton</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">singleton</span>​(<span class="arguments"><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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="SqlSplittableAggFunction.html#singleton(org.apache.calcite.rex.RexBuilder,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.core.AggregateCall)">SqlSplittableAggFunction</a></code></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></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></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><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>rexBuilder</code> - Rex builder</dd> |
| <dd><code>inputRowType</code> - Input row type</dd> |
| <dd><code>aggregateCall</code> - Aggregate call</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Expression for single row</dd> |
| </dl> |
| </section> |
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| <h3><a id="split(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.util.mapping.Mappings.TargetMapping)">split</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></span> <span class="memberName">split</span>​(<span class="arguments"><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> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></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> |
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| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="other(org.apache.calcite.rel.type.RelDataTypeFactory,org.apache.calcite.rel.core.AggregateCall)">other</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">@Nullable <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></span> <span class="memberName">other</span>​(<span class="arguments"><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="descfrmTypeLabel">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> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></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 class="blockList"> |
| <section class="detail"> |
| <h3><a 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)">topSplit</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></span> <span class="memberName">topSplit</span>​(<span class="arguments"><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="descfrmTypeLabel">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> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></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><span class="paramLabel">Parameters:</span></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><span class="returnLabel">Returns:</span></dt> |
| <dd>Aggregate call</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="merge(org.apache.calcite.rel.core.AggregateCall,org.apache.calcite.rel.core.AggregateCall)">merge</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">@Nullable <a href="../rel/core/AggregateCall.html" title="class in org.apache.calcite.rel.core">AggregateCall</a></span> <span class="memberName">merge</span>​(<span class="arguments"><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="descfrmTypeLabel">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> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></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><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>top</code> - top aggregate call</dd> |
| <dd><code>bottom</code> - bottom aggregate call</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Merged aggregate call, null if fails to merge aggregate calls</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getMergeAggFunctionOfTopSplit()">getMergeAggFunctionOfTopSplit</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected abstract</span> <span class="returnType"><a href="SqlAggFunction.html" title="class in org.apache.calcite.sql">SqlAggFunction</a></span> <span class="memberName">getMergeAggFunctionOfTopSplit</span>()</div> |
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