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<div class="subTitle">org.apache.calcite.adapter.enumerable</div>
<h2 title="接口 WinAggImplementor" class="title">接口 WinAggImplementor</h2>
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<dd><a href="../../../../../org/apache/calcite/adapter/enumerable/AggImplementor.html" title="org.apache.calcite.adapter.enumerable中的接口">AggImplementor</a></dd>
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<dd><a href="../../../../../org/apache/calcite/adapter/enumerable/RexImpTable.LagImplementor.html" title="org.apache.calcite.adapter.enumerable中的类">RexImpTable.LagImplementor</a>, <a href="../../../../../org/apache/calcite/adapter/enumerable/RexImpTable.LeadImplementor.html" title="org.apache.calcite.adapter.enumerable中的类">RexImpTable.LeadImplementor</a>, <a href="../../../../../org/apache/calcite/adapter/enumerable/StrictWinAggImplementor.html" title="org.apache.calcite.adapter.enumerable中的类">StrictWinAggImplementor</a></dd>
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<pre>public interface <span class="typeNameLabel">WinAggImplementor</span>
extends <a href="../../../../../org/apache/calcite/adapter/enumerable/AggImplementor.html" title="org.apache.calcite.adapter.enumerable中的接口">AggImplementor</a></pre>
<div class="block">Implements a windowed aggregate function by generating expressions to
initialize, add to, and get a result from, an accumulator.
Windowed aggregate is more powerful than regular aggregate since it can
access rows in the current partition by row indices.
Regular aggregate can be used to implement windowed aggregate.
<p>This interface does not define new methods: window-specific
sub-interfaces are passed when implementing window aggregate.</div>
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<dd><a href="../../../../../org/apache/calcite/adapter/enumerable/StrictWinAggImplementor.html" title="org.apache.calcite.adapter.enumerable中的类"><code>StrictWinAggImplementor</code></a>,
<code>RexImpTable.FirstLastValueImplementor</code>,
<code>RexImpTable.RankImplementor</code>,
<code>RexImpTable.RowNumberImplementor</code></dd>
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<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/enumerable/WinAggImplementor.SeekType.html" title="org.apache.calcite.adapter.enumerable中的枚举">WinAggImplementor.SeekType</a></span></code>
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current row.</div>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/enumerable/WinAggImplementor.html#needCacheWhenFrameIntact--">needCacheWhenFrameIntact</a></span>()</code>&nbsp;</td>
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<h3>从接口继承的方法&nbsp;org.apache.calcite.adapter.enumerable.<a href="../../../../../org/apache/calcite/adapter/enumerable/AggImplementor.html" title="org.apache.calcite.adapter.enumerable中的接口">AggImplementor</a></h3>
<code><a href="../../../../../org/apache/calcite/adapter/enumerable/AggImplementor.html#getStateType-org.apache.calcite.adapter.enumerable.AggContext-">getStateType</a>, <a href="../../../../../org/apache/calcite/adapter/enumerable/AggImplementor.html#implementAdd-org.apache.calcite.adapter.enumerable.AggContext-org.apache.calcite.adapter.enumerable.AggAddContext-">implementAdd</a>, <a href="../../../../../org/apache/calcite/adapter/enumerable/AggImplementor.html#implementReset-org.apache.calcite.adapter.enumerable.AggContext-org.apache.calcite.adapter.enumerable.AggResetContext-">implementReset</a>, <a href="../../../../../org/apache/calcite/adapter/enumerable/AggImplementor.html#implementResult-org.apache.calcite.adapter.enumerable.AggContext-org.apache.calcite.adapter.enumerable.AggResultContext-">implementResult</a></code></li>
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