io.druid.query.topn

Interface Generic1AggPooledTopNScanner

All Known Implementing Classes:

Generic1AggPooledTopNScannerPrototype

public interface Generic1AggPooledTopNScanner

Method Summary

Modifier and Type	Method and Description
long	scanAndAggregate(DimensionSelector dimensionSelector, BufferAggregator aggregator, int aggregatorSize, Cursor cursor, int[] positions, ByteBuffer resultsBuffer)

Method Detail

scanAndAggregate

long scanAndAggregate(DimensionSelector dimensionSelector,
                      BufferAggregator aggregator,
                      int aggregatorSize,
                      Cursor cursor,
                      int[] positions,
                      ByteBuffer resultsBuffer)

Parameters:

aggregatorSize - number of bytes required by aggregator 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