WinAggAddContext (Apache Calcite API)

All Superinterfaces:

AggAddContext, AggResetContext, AggResultContext, NestedBlockBuilder, WinAggFrameContext, WinAggFrameResultContext, WinAggResultContext

All Known Implementing Classes:

WinAggAddContextImpl
```
public interface WinAggAddContext
extends AggAddContext, WinAggResultContext
```
Information for a call to AggImplementor.implementAdd(AggContext, AggAddContext).
WinAggAddContext is used when implementing windowed aggregate. Typically, the aggregation implementation will use AggAddContext.arguments() or AggAddContext.rexArguments() to update aggregate value.

See Also:

AggAddContext

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  Expression currentPosition()
  Returns current position inside for-loop of window aggregate.
  - Methods inherited from interface org.apache.calcite.adapter.enumerable.AggAddContext
    arguments, rexArguments, rexFilterArgument, rowTranslator
  - Methods inherited from interface org.apache.calcite.adapter.enumerable.AggResetContext
    accumulator
  - Methods inherited from interface org.apache.calcite.adapter.enumerable.AggResultContext
    call, key, keyField
  - Methods inherited from interface org.apache.calcite.adapter.enumerable.NestedBlockBuilder
    currentBlock, currentNullables, exitBlock, nestBlock, nestBlock, nestBlock
  - Methods inherited from interface org.apache.calcite.adapter.enumerable.WinAggFrameContext
    endIndex, getFrameRowCount, getPartitionRowCount, hasRows, index, startIndex
  - Methods inherited from interface org.apache.calcite.adapter.enumerable.WinAggFrameResultContext
    compareRows, computeIndex, rowInFrame, rowInPartition, rowTranslator
  - Methods inherited from interface org.apache.calcite.adapter.enumerable.WinAggResultContext
    arguments, rexArguments

- Method Detail
  - currentPosition
```
Expression currentPosition()
```
    Returns current position inside for-loop of window aggregate. Note, the position is relative to WinAggFrameContext.startIndex(). This is NOT current row as in "rows between current row". If you need to know the relative index of the current row in the partition, use WinAggFrameContext.index().
    
    Returns:
    
    current position inside for-loop of window aggregate.
    
    See Also:
    
    WinAggFrameContext.index(), WinAggFrameContext.startIndex()