org.apache.drill.metastore.statistics

Interface CollectableTableStatisticsKind<T>

All Superinterfaces:

StatisticsKind<T>

All Known Implementing Classes:

TableStatisticsKind

public interface CollectableTableStatisticsKind<T>
extends StatisticsKind<T>

This class represents kinds of table statistics which may be received as a union of other statistics, for example row count may be received as a sum of row counts of underlying metadata parts.

Method Summary

Modifier and Type	Method and Description
T	mergeStatistics(Collection<? extends Metadata> statistics) Returns table statistics value received by collecting specified ColumnStatistics.

Methods inherited from interface org.apache.drill.metastore.statistics.StatisticsKind

getName, isExact

Method Detail

mergeStatistics

T mergeStatistics(Collection<? extends Metadata> statistics)

Returns table statistics value received by collecting specified ColumnStatistics.

Parameters:

statistics - list of ColumnStatistics instances to be collected

Returns:

column statistics value received by collecting specified ColumnStatistics