Package org.apache.druid.query.topn

Interface Generic1AggPooledTopNScanner

All Known Implementing Classes:

Generic1AggPooledTopNScannerPrototype

public interface Generic1AggPooledTopNScanner

Method Summary

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

Method Details

scanAndAggregate

long scanAndAggregate(DimensionSelector dimensionSelector,
 BufferAggregator aggregator,
 int aggregatorSize,
 Cursor cursor,
 CursorGranularizer granularizer,
 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