Package org.apache.druid.query.topn

Interface Generic2AggPooledTopNScanner

All Known Implementing Classes:

Generic2AggPooledTopNScannerPrototype

public interface Generic2AggPooledTopNScanner

Method Summary

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

Method Details

scanAndAggregate

long scanAndAggregate(DimensionSelector dimensionSelector,
 BufferAggregator aggregator1,
 int aggregator1Size,
 BufferAggregator aggregator2,
 int aggregator2Size,
 Cursor cursor,
 CursorGranularizer granularizer,
 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