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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.calcite.adapter.enumerable</a></div>
<h1 title="Interface WinAggImplementor" class="title">Interface WinAggImplementor</h1>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Superinterfaces:</dt>
<dd><code><a href="AggImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">AggImplementor</a></code></dd>
</dl>
<dl class="notes">
<dt>All Known Implementing Classes:</dt>
<dd><code><a href="RexImpTable.LagImplementor.html" title="class in org.apache.calcite.adapter.enumerable">RexImpTable.LagImplementor</a></code>, <code><a href="RexImpTable.LeadImplementor.html" title="class in org.apache.calcite.adapter.enumerable">RexImpTable.LeadImplementor</a></code>, <code><a href="StrictWinAggImplementor.html" title="class in org.apache.calcite.adapter.enumerable">StrictWinAggImplementor</a></code></dd>
</dl>
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<div class="type-signature"><span class="modifiers">public interface </span><span class="element-name type-name-label">WinAggImplementor</span><span class="extends-implements">
extends <a href="AggImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">AggImplementor</a></span></div>
<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>
<dl class="notes">
<dt>See Also:</dt>
<dd>
<ul class="see-list-long">
<li><a href="StrictWinAggImplementor.html" title="class in org.apache.calcite.adapter.enumerable"><code>StrictWinAggImplementor</code></a></li>
<li><code>RexImpTable.FirstLastValueImplementor</code></li>
<li><code>RexImpTable.RankImplementor</code></li>
<li><code>RexImpTable.RowNumberImplementor</code></li>
</ul>
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<!-- ======== NESTED CLASS SUMMARY ======== -->
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<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">Interface</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>static enum&nbsp;</code></div>
<div class="col-second even-row-color"><code><a href="WinAggImplementor.SeekType.html" class="type-name-link" title="enum in org.apache.calcite.adapter.enumerable">WinAggImplementor.SeekType</a></code></div>
<div class="col-last even-row-color">
<div class="block">Allows to access rows in window partition relative to first/last and
current row.</div>
</div>
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<div class="table-header col-first">Modifier and Type</div>
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<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-tab3"><code>boolean</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#needCacheWhenFrameIntact()" class="member-name-link">needCacheWhenFrameIntact</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3">&nbsp;</div>
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<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.calcite.adapter.enumerable.AggImplementor">Methods inherited from interface&nbsp;org.apache.calcite.adapter.enumerable.<a href="AggImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">AggImplementor</a></h3>
<code><a href="AggImplementor.html#getStateType(org.apache.calcite.adapter.enumerable.AggContext)">getStateType</a>, <a href="AggImplementor.html#implementAdd(org.apache.calcite.adapter.enumerable.AggContext,org.apache.calcite.adapter.enumerable.AggAddContext)">implementAdd</a>, <a href="AggImplementor.html#implementReset(org.apache.calcite.adapter.enumerable.AggContext,org.apache.calcite.adapter.enumerable.AggResetContext)">implementReset</a>, <a href="AggImplementor.html#implementResult(org.apache.calcite.adapter.enumerable.AggContext,org.apache.calcite.adapter.enumerable.AggResultContext)">implementResult</a></code></div>
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<h2>Method Details</h2>
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<section class="detail" id="needCacheWhenFrameIntact()">
<h3>needCacheWhenFrameIntact</h3>
<div class="member-signature"><span class="return-type">boolean</span>&nbsp;<span class="element-name">needCacheWhenFrameIntact</span>()</div>
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