io.druid.query.topn

Interface Generic2AggPooledTopNScanner

All Known Implementing Classes:

Generic2AggPooledTopNScannerPrototype

public interface Generic2AggPooledTopNScanner

Method Summary

Modifier and Type	Method and Description
long	scanAndAggregate(DimensionSelector dimensionSelector, BufferAggregator aggregator1, int aggregator1Size, BufferAggregator aggregator2, int aggregator2Size, Cursor cursor, int[] positions, ByteBuffer resultsBuffer)

Method Detail

scanAndAggregate

long scanAndAggregate(DimensionSelector dimensionSelector,
                      BufferAggregator aggregator1,
                      int aggregator1Size,
                      BufferAggregator aggregator2,
                      int aggregator2Size,
                      Cursor cursor,
                      int[] positions,
                      ByteBuffer resultsBuffer)

Parameters:

aggregator1Size - number of bytes required by aggregator1 for a single aggregation

aggregator2Size - number of bytes required by aggregator2 for a single aggregation

positions - a cache for positions in resultsBuffer, where specific (indexed) dimension values are aggregated

Returns:

number of scanned rows, i. e. number of steps made with the given cursor