org.apache.gravitino.dto.rel.partitioning

Class BucketPartitioningDTO

java.lang.Object

org.apache.gravitino.dto.rel.partitioning.BucketPartitioningDTO

All Implemented Interfaces:

Partitioning, Expression, Transform

public final class BucketPartitioningDTO
extends java.lang.Object
implements Partitioning

Data transfer object representing bucket partitioning.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.gravitino.dto.rel.partitioning.Partitioning

Partitioning.SingleFieldPartitioning, Partitioning.Strategy

Nested classes/interfaces inherited from interface org.apache.gravitino.rel.expressions.transforms.Transform

Transform.SingleFieldTransform

Field Summary

Fields inherited from interface org.apache.gravitino.dto.rel.partitioning.Partitioning

EMPTY_PARTITIONING

Fields inherited from interface org.apache.gravitino.rel.expressions.Expression

EMPTY_EXPRESSION, EMPTY_NAMED_REFERENCE

Method Summary

Modifier and Type	Method and Description
Expression[]	arguments()
java.lang.String[][]	fieldNames() Returns the field names.
java.lang.String	name()
int	numBuckets() Returns the number of buckets.
static BucketPartitioningDTO	of(int numBuckets, java.lang.String[]... fieldNames) Creates a new instance of BucketPartitioningDTO.
Partitioning.Strategy	strategy() Returns the name of the partitioning strategy.
void	validate(ColumnDTO[] columns) Validates the partitioning columns.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.gravitino.rel.expressions.transforms.Transform

assignments, children

Methods inherited from interface org.apache.gravitino.rel.expressions.Expression

references

Method Detail

of

public static BucketPartitioningDTO of(int numBuckets,
                                       java.lang.String[]... fieldNames)

Creates a new instance of BucketPartitioningDTO.

Parameters:

numBuckets - The number of buckets.

fieldNames - The field names.

Returns:

The new instance.

numBuckets

public int numBuckets()

Returns the number of buckets.

Returns:

The number of buckets.

fieldNames

public java.lang.String[][] fieldNames()

Returns the field names.

Returns:

The field names.

strategy

public Partitioning.Strategy strategy()

Description copied from interface: Partitioning

Returns the name of the partitioning strategy.

Specified by:

strategy in interface Partitioning

Returns:

The strategy of the partitioning.

validate

public void validate(ColumnDTO[] columns)
              throws java.lang.IllegalArgumentException

Validates the partitioning columns.

Specified by:

validate in interface Partitioning

Parameters:

columns - The columns to be validated.

Throws:

java.lang.IllegalArgumentException - If the columns are invalid, this exception is thrown.

name

public java.lang.String name()

Specified by:

name in interface Transform

Returns:

The name of the partitioning strategy.

arguments

public Expression[] arguments()

Specified by:

arguments in interface Transform

Returns:

The arguments of the partitioning strategy.