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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.adapter.enumerable</a></div> |
| <h1 title="Interface WinAggImplementor" class="title">Interface WinAggImplementor</h1> |
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| <dt>All Superinterfaces:</dt> |
| <dd><code><a href="AggImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">AggImplementor</a></code></dd> |
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| <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> |
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| <pre>public interface <span class="typeNameLabel">WinAggImplementor</span> |
| extends <a href="AggImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">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> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="StrictWinAggImplementor.html" title="class in org.apache.calcite.adapter.enumerable"><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 </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="WinAggImplementor.SeekType.html" title="enum in org.apache.calcite.adapter.enumerable">WinAggImplementor.SeekType</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Allows to access rows in window partition relative to first/last and |
| current row.</div> |
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| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#needCacheWhenFrameIntact()">needCacheWhenFrameIntact</a></span>()</code></th> |
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| <h3>Methods inherited from interface org.apache.calcite.adapter.enumerable.<a href="AggImplementor.html" title="interface in org.apache.calcite.adapter.enumerable">AggImplementor</a></h3> |
| <a id="methods.inherited.from.class.org.apache.calcite.adapter.enumerable.AggImplementor"> |
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| </a><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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