Package org.apache.iceberg.expressions

Class CountStar<T>

java.lang.Object

org.apache.iceberg.expressions.Aggregate<BoundTerm<T>>

org.apache.iceberg.expressions.BoundAggregate<T,Long>

org.apache.iceberg.expressions.CountAggregate<T>

org.apache.iceberg.expressions.CountStar<T>

All Implemented Interfaces:

Serializable, Bound<Long>, Expression

public class CountStar<T>
extends CountAggregate<T>

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.iceberg.expressions.Expression

Expression.Operation

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	CountStar(BoundTerm<T> term)

Method Summary

Modifier and Type	Method	Description
protected Long	countFor(DataFile file)
protected Long	countFor(StructLike row)
protected boolean	hasValue(DataFile file)

Methods inherited from class org.apache.iceberg.expressions.CountAggregate

eval, eval, newAggregator

Methods inherited from class org.apache.iceberg.expressions.BoundAggregate

columnName, describe, ref, type

Methods inherited from class org.apache.iceberg.expressions.Aggregate

op, term, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.iceberg.expressions.Expression

isEquivalentTo, negate

Constructor Details

CountStar

protected CountStar(BoundTerm<T> term)

Method Details

countFor

protected Long countFor(StructLike row)

Overrides:

countFor in class CountAggregate<T>

hasValue

protected boolean hasValue(DataFile file)

countFor

protected Long countFor(DataFile file)

Overrides:

countFor in class CountAggregate<T>