org.apache.gravitino.rel.partitions

Class Partitions

java.lang.Object

org.apache.gravitino.rel.partitions.Partitions

public class Partitions
extends java.lang.Object

The helper class for partition expressions.

Field Summary

Fields

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

Method Summary

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

EMPTY_PARTITIONS

public static Partition[] EMPTY_PARTITIONS

An empty array of partitions.

Method Detail

range

public static RangePartition range(java.lang.String name,
                                   Literal<?> upper,
                                   Literal<?> lower,
                                   java.util.Map<java.lang.String,java.lang.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(java.lang.String name,
                                 Literal<?>[][] lists,
                                 java.util.Map<java.lang.String,java.lang.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(java.lang.String name,
                                         java.lang.String[][] fieldNames,
                                         Literal<?>[] values,
                                         java.util.Map<java.lang.String,java.lang.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(java.lang.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.