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 and Description
Table	innerJoin(Table.TableOperation rightJoinIndices) Joins two tables on the join columns that are passed in.
Table	leftJoin(Table.TableOperation rightJoinIndices) Joins two tables on the join columns that are passed in.
PartitionedTable	partition(int numberOfPartitions, HashFunction hashFunction) Partitions a table based on the number of partitions provided.

Methods inherited from class java.lang.Object

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

Method Detail

leftJoin

public Table leftJoin(Table.TableOperation rightJoinIndices)

Joins two tables on the join columns that are passed in. Usage: Table t1 ... Table t2 ... Table result = t1.onColumns(0,1).leftJoin(t2.onColumns(2,3));

Parameters:

rightJoinIndices - - Indices of the right table to join on

Returns:

Joined Table

innerJoin

public Table innerJoin(Table.TableOperation rightJoinIndices)

Joins two tables on the join columns that are passed in. Usage: Table t1 ... Table t2 ... Table result = t1.onColumns(0,1).innerJoin(t2.onColumns(2,3));

Parameters:

rightJoinIndices - - Indices of the right table to join on

Returns:

Joined Table

partition

public PartitionedTable partition(int numberOfPartitions,
                                  HashFunction hashFunction)

Partitions a table based on the number of partitions provided.

Parameters:

numberOfPartitions - - number of partitions to use

hashFunction - - hash function to use to partition

Returns:

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