com.datastrato.gravitino.rel.partitions

Class Partitions

java.lang.Object

com.datastrato.gravitino.rel.partitions.Partitions

public class Partitions
extends java.lang.Object

The helper class for partition expressions.

Constructor Summary

Constructors

Constructor and Description
Partitions()

Method Summary

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

Constructor Detail

Partitions

public Partitions()

Method Detail

range

public static Partition 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 Partition list(java.lang.String name,
                             Literal<?>[][] lists,
                             java.util.Map<java.lang.String,java.lang.String> properties)

Creates a list partition.

Each list in the lists must have the same length. The values in each list must correspond to the field definitions in the Transforms.ListTransform#fieldNames().

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 Partition 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 Partition 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.