org.apache.spark.sql.connector.expressions.aggregate

Class Count

Object

org.apache.spark.sql.connector.expressions.aggregate.Count

All Implemented Interfaces:

java.io.Serializable, AggregateFunc, Expression

@Evolving
public final class Count
extends Object
implements AggregateFunc

An aggregate function that returns the number of the specific row in a group.

Since:

3.2.0

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
Count(NamedReference column, boolean isDistinct)

Method Summary

Modifier and Type	Method and Description
NamedReference	column()
String	describe() Format the expression as a human readable SQL-like string.
boolean	isDistinct()
String	toString()

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Count

public Count(NamedReference column,
             boolean isDistinct)

Method Detail

column

public NamedReference column()

isDistinct

public boolean isDistinct()

toString

public String toString()

Overrides:

toString in class Object

describe

public String describe()

Description copied from interface: Expression

Format the expression as a human readable SQL-like string.

Specified by:

describe in interface Expression