Package org.apache.druid.query.aggregation.cardinality

Class CardinalityAggregator

java.lang.Object
org.apache.druid.query.aggregation.cardinality.CardinalityAggregator
All Implemented Interfaces:
Closeable, AutoCloseable, Aggregator
public class CardinalityAggregator extends Object implements Aggregator

  • Field Details

    • HASH_FUNCTION

      public static final com.google.common.hash.HashFunction HASH_FUNCTION

  • Method Details

    • aggregate

      public void aggregate()
      Description copied from interface: Aggregator
      Performs aggregation.
      Specified by:
      aggregate in interface Aggregator

    • get

      public Object get()
      Specified by:
      get in interface Aggregator

    • getFloat

      public float getFloat()
      Specified by:
      getFloat in interface Aggregator

    • getLong

      public long getLong()
      Specified by:
      getLong in interface Aggregator

    • getDouble

      public double getDouble()
      Description copied from interface: Aggregator
      The default implementation casts Aggregator.getFloat() to double. This default method is added to enable smooth backward compatibility, please re-implement it if your aggregators work with numeric double columns.
      Specified by:
      getDouble in interface Aggregator

    • close

      public void close()
      Specified by:
      close in interface Aggregator
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Closeable