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| <h2 title="Interface WinAggImplementor" class="title">Interface WinAggImplementor</h2> |
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| <pre>public interface <span class="typeNameLabel">WinAggImplementor</span> |
| extends <a href="../../../../../org/apache/calcite/adapter/enumerable/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> |
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| <dd><a href="../../../../../org/apache/calcite/adapter/enumerable/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> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/enumerable/WinAggImplementor.SeekType.html" title="enum in org.apache.calcite.adapter.enumerable">WinAggImplementor.SeekType</a></span></code> |
| <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> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/adapter/enumerable/WinAggImplementor.html#needCacheWhenFrameIntact--">needCacheWhenFrameIntact</a></span>()</code> </td> |
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| <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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