org.apache.drill.exec.physical.impl.window

Class Partition

java.lang.Object

org.apache.drill.exec.physical.impl.window.Partition

public class Partition
extends Object

Used internally to keep track of partitions and frames.
A partition can be partial, which means we don't know "yet" the total number of records that are part of this partition. Even for partial partitions, we know the number of rows that are part of current frame

Field Summary

Fields

Modifier and Type	Field and Description
double	cume_dist
int	dense_rank
double	percent_rank
int	rank
int	row_number

Constructor Summary

Constructors

Constructor and Description
Partition()

Method Summary

Methods

Modifier and Type	Method and Description
long	getLength()
long	getRemaining()
boolean	isDone()
boolean	isFrameDone()
void	newFrame(long peers)
int	ntile(int numTiles)
void	rowAggregated()
String	toString()
void	updateLength(long length, boolean partial)

Methods inherited from class java.lang.Object

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

Field Detail

row_number

public int row_number

rank

public int rank

dense_rank

public int dense_rank

percent_rank

public double percent_rank

cume_dist

public double cume_dist

Constructor Detail

Partition

public Partition()

Method Detail

getRemaining

public long getRemaining()

Returns:

number of rows not yet aggregated in this partition

getLength

public long getLength()

updateLength

public void updateLength(long length,
                boolean partial)

Parameters:

length - number of rows in this partition

partial - if true, then length is not the full length of the partition but just the number of rows in the current batch

rowAggregated

public void rowAggregated()

newFrame

public void newFrame(long peers)

isDone

public boolean isDone()

ntile

public int ntile(int numTiles)

isFrameDone

public boolean isFrameDone()

toString

public String toString()

Overrides:

toString in class Object