org.apache.paimon.mergetree.compact.aggregate

Class FieldFirstValueAgg

java.lang.Object

org.apache.paimon.mergetree.compact.aggregate.FieldAggregator

org.apache.paimon.mergetree.compact.aggregate.FieldFirstValueAgg

All Implemented Interfaces:

Serializable

public class FieldFirstValueAgg
extends FieldAggregator

first value aggregate a field of a row.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.paimon.mergetree.compact.aggregate.FieldAggregator

fieldType, name

Constructor Summary

Constructors

Constructor and Description
FieldFirstValueAgg(String name, DataType dataType)

Method Summary

Modifier and Type	Method and Description
Object	agg(Object accumulator, Object inputField)
void	reset() reset the aggregator to a clean start state.

Methods inherited from class org.apache.paimon.mergetree.compact.aggregate.FieldAggregator

aggReversed, retract

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FieldFirstValueAgg

public FieldFirstValueAgg(String name,
                          DataType dataType)

Method Detail

agg

public Object agg(Object accumulator,
                  Object inputField)

Specified by:

agg in class FieldAggregator

reset

public void reset()

Description copied from class: FieldAggregator

reset the aggregator to a clean start state.

Overrides:

reset in class FieldAggregator