Package ai.rapids.cudf

Class Table.TableOperation

java.lang.Object

ai.rapids.cudf.Table.TableOperation

Enclosing class:

Table

public static final class Table.TableOperation
extends Object

Method Summary

Modifier and Type	Method	Description
PartitionedTable	hashPartition(int numberOfPartitions)	Hash partition a table into the specified number of partitions.
PartitionedTable	hashPartition(HashType type, int numberOfPartitions)	Hash partition a table into the specified number of partitions.
PartitionedTable	hashPartition(HashType type, int numberOfPartitions, int seed)	Hash partition a table into the specified number of partitions.

Methods inherited from class java.lang.Object

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

Method Details

hashPartition

public PartitionedTable hashPartition(int numberOfPartitions)

Hash partition a table into the specified number of partitions. Uses the default MURMUR3 hashing.

Parameters:

numberOfPartitions - - number of partitions to use

Returns:

- PartitionedTable - Table that exposes a limited functionality of the Table class

hashPartition

public PartitionedTable hashPartition(HashType type,
 int numberOfPartitions)

Hash partition a table into the specified number of partitions.

Parameters:

type - the type of hash to use. Depending on the type of hash different restrictions on the hash column(s) may exist. Not all hash functions are guaranteed to work besides IDENTITY and MURMUR3.

numberOfPartitions - - number of partitions to use

Returns:

PartitionedTable - Table that exposes a limited functionality of the Table class

hashPartition

public PartitionedTable hashPartition(HashType type,
 int numberOfPartitions,
 int seed)

Hash partition a table into the specified number of partitions.

Parameters:

type - the type of hash to use. Depending on the type of hash different restrictions on the hash column(s) may exist. Not all hash functions are guaranteed to work besides IDENTITY and MURMUR3.

numberOfPartitions - number of partitions to use

seed - the seed value for hashing

Returns:

Table that exposes a limited functionality of the Table class