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
PartitionedTable	hashPartition(int numberOfPartitions) Hash partition a table into the specified number of partitions.
Table	innerJoin(Table.TableOperation rightJoinIndices) Joins two tables on the join columns that are passed in.
Table	leftAntiJoin(Table.TableOperation rightJoinIndices) Performs an anti-join between a left table and a right table, returning only the rows from the left table that do not match rows in the right table on the join keys.
Table	leftJoin(Table.TableOperation rightJoinIndices) Joins two tables on the join columns that are passed in.
Table	leftSemiJoin(Table.TableOperation rightJoinIndices) Performs a semi-join between a left table and a right table, returning only the rows from the left table that match rows in the right table on the join keys.
PartitionedTable	partition(int numberOfPartitions) Deprecated. Use hashPartition(int)

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:

the joined table. The order of the columns returned will be join columns, left non-join columns, right non-join columns.

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:

the joined table. The order of the columns returned will be join columns, left non-join columns, right non-join columns.

leftSemiJoin

public Table leftSemiJoin(Table.TableOperation rightJoinIndices)

Performs a semi-join between a left table and a right table, returning only the rows from the left table that match rows in the right table on the join keys. Usage: Table t1 ... Table t2 ... Table result = t1.onColumns(0,1).leftSemiJoin(t2.onColumns(2,3));

Parameters:

rightJoinIndices - - Indices of the right table to join on

Returns:

the left semi-joined table.

leftAntiJoin

public Table leftAntiJoin(Table.TableOperation rightJoinIndices)

Performs an anti-join between a left table and a right table, returning only the rows from the left table that do not match rows in the right table on the join keys. Usage: Table t1 ... Table t2 ... Table result = t1.onColumns(0,1).leftAntiJoin(t2.onColumns(2,3));

Parameters:

rightJoinIndices - - Indices of the right table to join on

Returns:

the left anti-joined table.

hashPartition

public PartitionedTable hashPartition(int numberOfPartitions)

Hash partition a table into the specified number of partitions.

Parameters:

numberOfPartitions - - number of partitions to use

Returns:

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

partition

@Deprecated
public PartitionedTable partition(int numberOfPartitions)

Deprecated. Use hashPartition(int)

Hash partition a table into the specified number of partitions.

Parameters:

numberOfPartitions - - number of partitions to use

Returns:

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