Package org.apache.pinot.segment.spi.partition

Class BoundedColumnValuePartitionFunction

java.lang.Object

org.apache.pinot.segment.spi.partition.BoundedColumnValuePartitionFunction

All Implemented Interfaces:

Serializable, PartitionFunction

public class BoundedColumnValuePartitionFunction
extends Object
implements PartitionFunction

Implementation of PartitionFunction which partitions based configured column values. "columnPartitionMap": { "subject": { "functionName": "BoundedColumnValue", "functionConfig": { "columnValues": "Maths|English|Chemistry", "columnValuesDelimiter": "|" }, "numPartitions": 4 } } With this partition config on column "subject", partitionId would be 1 for Maths, 2 for English and 3 for Chemistry. partitionId would be "0" for all other values which may occur, therefore 'numPartitions' is set to 4.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
BoundedColumnValuePartitionFunction(int numPartitions, Map<String,String> functionConfig)

Method Summary

Modifier and Type	Method	Description
Map<String,String>	getFunctionConfig()
String	getName()	Returns the name of the partition function.
int	getNumPartitions()	Returns number of partitions configured for the column.
int	getPartition(Object value)	Method to compute and return partition id for the given value.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

BoundedColumnValuePartitionFunction

public BoundedColumnValuePartitionFunction(int numPartitions,
                                           Map<String,String> functionConfig)

Method Detail

getPartition

public int getPartition(Object value)

Description copied from interface: PartitionFunction

Method to compute and return partition id for the given value.

Specified by:

getPartition in interface PartitionFunction

Parameters:

value - Value for which to determine the partition id.

Returns:

partition id for the value.

getName

public String getName()

Description copied from interface: PartitionFunction

Returns the name of the partition function.

Specified by:

getName in interface PartitionFunction

Returns:

Name of the partition function.

getNumPartitions

public int getNumPartitions()

Returns number of partitions configured for the column.

Specified by:

getNumPartitions in interface PartitionFunction

Returns:

Total number of partitions for the function.

getFunctionConfig

public Map<String,String> getFunctionConfig()

Specified by:

getFunctionConfig in interface PartitionFunction

toString

public String toString()

Overrides:

toString in class Object