org.apache.calcite.adapter.enumerable

Interface WinAggAddContext

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

Methods

Modifier and Type	Method and Description
Expression	currentPosition() Returns current position inside for-loop of window aggregate.

Methods inherited from interface org.apache.calcite.adapter.enumerable.AggAddContext

arguments, rexArguments, rowTranslator

Methods inherited from interface org.apache.calcite.adapter.enumerable.WinAggResultContext

arguments, rexArguments

Methods inherited from interface org.apache.calcite.adapter.enumerable.AggResetContext

accumulator

Methods inherited from interface org.apache.calcite.adapter.enumerable.WinAggFrameResultContext

compareRows, computeIndex, rowInFrame, rowInPartition, rowTranslator

Methods inherited from interface org.apache.calcite.adapter.enumerable.WinAggFrameContext

endIndex, getFrameRowCount, getPartitionRowCount, hasRows, index, startIndex

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()