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| <h2 title="类 SqlSplittableAggFunction.AbstractSumSplitter" class="title">类 SqlSplittableAggFunction.AbstractSumSplitter</h2> |
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| <li>org.apache.calcite.sql.SqlSplittableAggFunction.AbstractSumSplitter</li> |
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| <dt>所有已实现的接口:</dt> |
| <dd><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction</a></dd> |
| </dl> |
| <dl> |
| <dt>直接已知子类:</dt> |
| <dd><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.Sum0Splitter.html" title="org.apache.calcite.sql中的类">SqlSplittableAggFunction.Sum0Splitter</a>, <a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.SumSplitter.html" title="org.apache.calcite.sql中的类">SqlSplittableAggFunction.SumSplitter</a></dd> |
| </dl> |
| <dl> |
| <dt>封闭接口:</dt> |
| <dd><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction</a></dd> |
| </dl> |
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| <br> |
| <pre>public abstract static class <span class="typeNameLabel">SqlSplittableAggFunction.AbstractSumSplitter</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a> |
| implements <a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction</a></pre> |
| <div class="block">Common splitting strategy for <code>SUM</code> and <code>SUM0</code> functions.</div> |
| </li> |
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| <li class="blockList"><a name="nested.classes.inherited.from.class.org.apache.calcite.sql.SqlSplittableAggFunction"> |
| <!-- --> |
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| <h3>从接口继承的嵌套类/接口 org.apache.calcite.sql.<a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction</a></h3> |
| <code><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.AbstractSumSplitter.html" title="org.apache.calcite.sql中的类">SqlSplittableAggFunction.AbstractSumSplitter</a>, <a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.CountSplitter.html" title="org.apache.calcite.sql中的类">SqlSplittableAggFunction.CountSplitter</a>, <a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.Registry.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction.Registry</a><<a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.Registry.html" title="SqlSplittableAggFunction.Registry中的类型参数">E</a>>, <a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.SelfSplitter.html" title="org.apache.calcite.sql中的类">SqlSplittableAggFunction.SelfSplitter</a>, <a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.Sum0Splitter.html" title="org.apache.calcite.sql中的类">SqlSplittableAggFunction.Sum0Splitter</a>, <a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.SumSplitter.html" title="org.apache.calcite.sql中的类">SqlSplittableAggFunction.SumSplitter</a></code></li> |
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| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| <h3>构造器概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="构造器概要表, 列表构造器和解释"> |
| <caption><span>构造器</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">构造器和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.AbstractSumSplitter.html#AbstractSumSplitter--">AbstractSumSplitter</a></span>()</code> </td> |
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| <h3>方法概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释"> |
| <caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">抽象方法</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">方法和说明</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>protected abstract <a href="../../../../org/apache/calcite/sql/SqlAggFunction.html" title="org.apache.calcite.sql中的类">SqlAggFunction</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.AbstractSumSplitter.html#getMergeAggFunctionOfTopSplit--">getMergeAggFunctionOfTopSplit</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.AbstractSumSplitter.html#merge-org.apache.calcite.rel.core.AggregateCall-org.apache.calcite.rel.core.AggregateCall-">merge</a></span>(<a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> top, |
| <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> bottom)</code> |
| <div class="block">Merge top and bottom aggregate calls into a single aggregate call, |
| if they are legit to merge.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.AbstractSumSplitter.html#other-org.apache.calcite.rel.type.RelDataTypeFactory-org.apache.calcite.rel.core.AggregateCall-">other</a></span>(<a href="../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a> typeFactory, |
| <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> e)</code> |
| <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 id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.AbstractSumSplitter.html#singleton-org.apache.calcite.rex.RexBuilder-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.core.AggregateCall-">singleton</a></span>(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder, |
| <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a> inputRowType, |
| <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> aggregateCall)</code> |
| <div class="block">Generates an expression for the value of the aggregate function when |
| applied to a single row.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.AbstractSumSplitter.html#split-org.apache.calcite.rel.core.AggregateCall-org.apache.calcite.util.mapping.Mappings.TargetMapping-">split</a></span>(<a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> aggregateCall, |
| <a href="../../../../org/apache/calcite/util/mapping/Mappings.TargetMapping.html" title="org.apache.calcite.util.mapping中的接口">Mappings.TargetMapping</a> mapping)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.AbstractSumSplitter.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></span>(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder, |
| <a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.Registry.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction.Registry</a><<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> extra, |
| int offset, |
| <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a> inputRowType, |
| <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> aggregateCall, |
| int leftSubTotal, |
| int rightSubTotal)</code> |
| <div class="block">Generates an aggregate call to merge sub-totals.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
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| <h3>从类继承的方法 java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>构造器详细资料</h3> |
| <a name="AbstractSumSplitter--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>AbstractSumSplitter</h4> |
| <pre>public AbstractSumSplitter()</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>方法详细资料</h3> |
| <a name="singleton-org.apache.calcite.rex.RexBuilder-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.core.AggregateCall-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>singleton</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> singleton(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder, |
| <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a> inputRowType, |
| <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> aggregateCall)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <code><a href="../../../../org/apache/calcite/sql/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">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html#singleton-org.apache.calcite.rex.RexBuilder-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.core.AggregateCall-">singleton</a></code> 在接口中 <code><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction</a></code></dd> |
| <dt><span class="paramLabel">参数:</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">返回:</span></dt> |
| <dd>Expression for single row</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="split-org.apache.calcite.rel.core.AggregateCall-org.apache.calcite.util.mapping.Mappings.TargetMapping-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>split</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> split(<a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> aggregateCall, |
| <a href="../../../../org/apache/calcite/util/mapping/Mappings.TargetMapping.html" title="org.apache.calcite.util.mapping中的接口">Mappings.TargetMapping</a> mapping)</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html#split-org.apache.calcite.rel.core.AggregateCall-org.apache.calcite.util.mapping.Mappings.TargetMapping-">split</a></code> 在接口中 <code><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="other-org.apache.calcite.rel.type.RelDataTypeFactory-org.apache.calcite.rel.core.AggregateCall-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>other</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> other(<a href="../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="org.apache.calcite.rel.type中的接口">RelDataTypeFactory</a> typeFactory, |
| <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> e)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <code><a href="../../../../org/apache/calcite/sql/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">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html#other-org.apache.calcite.rel.type.RelDataTypeFactory-org.apache.calcite.rel.core.AggregateCall-">other</a></code> 在接口中 <code><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="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-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>topSplit</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> topSplit(<a href="../../../../org/apache/calcite/rex/RexBuilder.html" title="org.apache.calcite.rex中的类">RexBuilder</a> rexBuilder, |
| <a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.Registry.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction.Registry</a><<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> extra, |
| int offset, |
| <a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a> inputRowType, |
| <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> aggregateCall, |
| int leftSubTotal, |
| int rightSubTotal)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <code><a href="../../../../org/apache/calcite/sql/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="../../../../org/apache/calcite/rex/RexInputRef.html" title="org.apache.calcite.rex中的类"><code>RexInputRef</code></a> that points to it.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/sql/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> 在接口中 <code><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction</a></code></dd> |
| <dt><span class="paramLabel">参数:</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">返回:</span></dt> |
| <dd>Aggregate call</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="merge-org.apache.calcite.rel.core.AggregateCall-org.apache.calcite.rel.core.AggregateCall-"> |
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| </a> |
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| <h4>merge</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> merge(<a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> top, |
| <a href="../../../../org/apache/calcite/rel/core/AggregateCall.html" title="org.apache.calcite.rel.core中的类">AggregateCall</a> bottom)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <code><a href="../../../../org/apache/calcite/sql/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">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html#merge-org.apache.calcite.rel.core.AggregateCall-org.apache.calcite.rel.core.AggregateCall-">merge</a></code> 在接口中 <code><a href="../../../../org/apache/calcite/sql/SqlSplittableAggFunction.html" title="org.apache.calcite.sql中的接口">SqlSplittableAggFunction</a></code></dd> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>top</code> - top aggregate call</dd> |
| <dd><code>bottom</code> - bottom aggregate call</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>Merged aggregate call, null if fails to merge aggregate calls</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getMergeAggFunctionOfTopSplit--"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getMergeAggFunctionOfTopSplit</h4> |
| <pre>protected abstract <a href="../../../../org/apache/calcite/sql/SqlAggFunction.html" title="org.apache.calcite.sql中的类">SqlAggFunction</a> getMergeAggFunctionOfTopSplit()</pre> |
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