Package org.apache.gravitino.rel.partitions

Class Partitions

java.lang.Object

org.apache.gravitino.rel.partitions.Partitions

public class Partitions
extends Object

The helper class for partition expressions.

Field Summary

Fields

Modifier and Type	Field	Description
static Partition[]	EMPTY_PARTITIONS	An empty array of partitions.

Method Summary

Modifier and Type	Method	Description
static IdentityPartition	identity(String[][] fieldNames, Literal<?>[] values)	Creates an identity partition whose name will be automatically generated.
static IdentityPartition	identity(String name, String[][] fieldNames, Literal<?>[] values, Map<String,String> properties)	Creates an identity partition.
static ListPartition	list(String name, Literal<?>[][] lists, Map<String,String> properties)	Creates a list partition.
static RangePartition	range(String name, Literal<?> upper, Literal<?> lower, Map<String,String> properties)	Creates a range partition.

Methods inherited from class java.lang.Object

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

Field Details

EMPTY_PARTITIONS

public static Partition[] EMPTY_PARTITIONS

An empty array of partitions.

Method Details

range

public static RangePartition range(String name,
 Literal<?> upper,
 Literal<?> lower,
 Map<String,String> properties)

Creates a range partition.

Parameters:

name - The name of the partition.

upper - The upper bound of the partition.

lower - The lower bound of the partition.

properties - The properties of the partition.

Returns:

The created partition.

list

public static ListPartition list(String name,
 Literal<?>[][] lists,
 Map<String,String> properties)

Creates a list partition.

Parameters:

name - The name of the partition.

lists - The values of the list partition.

properties - The properties of the partition.

Returns:

The created partition.

identity

public static IdentityPartition identity(String name,
 String[][] fieldNames,
 Literal<?>[] values,
 Map<String,String> properties)

Creates an identity partition.

The values must correspond to the fieldNames.

Parameters:

name - The name of the partition.

fieldNames - The field names of the identity partition.

values - The value of the identity partition.

properties - The properties of the partition.

Returns:

The created partition.

identity

public static IdentityPartition identity(String[][] fieldNames,
 Literal<?>[] values)

Creates an identity partition whose name will be automatically generated.

Parameters:

fieldNames - The field names of the identity partition.

values - The values of the identity partition.

Returns:

The created partition.