Package org.apache.orc

Interface ColumnStatistics

All Known Subinterfaces:
BinaryColumnStatistics, BooleanColumnStatistics, CollectionColumnStatistics, DateColumnStatistics, DecimalColumnStatistics, DoubleColumnStatistics, GeospatialColumnStatistics, IntegerColumnStatistics, StringColumnStatistics, TimestampColumnStatistics
All Known Implementing Classes:
ColumnStatisticsImpl, ColumnStatisticsImpl.BinaryStatisticsImpl, ColumnStatisticsImpl.StringStatisticsImpl
public interface ColumnStatistics
Statistics that are available for all types of columns.

  • Method Summary

    Modifier and Type
    Method
    Description
    long
    getBytesOnDisk()
    Get the number of bytes for this column.
    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 Details

    • 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

    • getBytesOnDisk

      long getBytesOnDisk()
      Get the number of bytes for this column.
      Returns:
      the number of bytes