org.apache.hadoop.hive.ql.io.orc

Interface ColumnStatistics

All Known Subinterfaces:

BinaryColumnStatistics, BooleanColumnStatistics, DateColumnStatistics, DecimalColumnStatistics, DoubleColumnStatistics, IntegerColumnStatistics, StringColumnStatistics, TimestampColumnStatistics

public interface ColumnStatistics

Statistics that are available for all types of columns.

Method Summary

Methods

Modifier and Type	Method and Description
long	getNumberOfValues() Get the number of values in this column.
boolean	hasNull() Returns true if there are nulls in the scope of column statistics.

Method Detail

getNumberOfValues

long getNumberOfValues()

Get the number of values in this column. It will differ from the number of rows because of NULL values and repeated values.

Returns:

the number of values

hasNull

boolean hasNull()

Returns true if there are nulls in the scope of column statistics.

Returns:

true if null present else false