org.apache.calcite.rel.core

Enum Aggregate.Group

java.lang.Object

java.lang.Enum<Aggregate.Group>

org.apache.calcite.rel.core.Aggregate.Group

All Implemented Interfaces:

Serializable, Comparable<Aggregate.Group>

Enclosing class:

Aggregate

public static enum Aggregate.Group
extends Enum<Aggregate.Group>

Describes the kind of roll-up.

Enum Constant Summary

Enum Constants

Enum Constant and Description
CUBE
OTHER
ROLLUP
SIMPLE

Method Summary

Modifier and Type	Method and Description
static List<Integer>	getRollup(List<ImmutableBitSet> groupSets) Returns the ordered list of bits in a rollup.
static Aggregate.Group	induce(ImmutableBitSet groupSet, List<ImmutableBitSet> groupSets)
static boolean	isRollup(ImmutableBitSet groupSet, List<ImmutableBitSet> groupSets) Returns whether a list of sets is a rollup.
static Aggregate.Group	valueOf(String name) Returns the enum constant of this type with the specified name.
static Aggregate.Group[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

SIMPLE

public static final Aggregate.Group SIMPLE

ROLLUP

public static final Aggregate.Group ROLLUP

CUBE

public static final Aggregate.Group CUBE

OTHER

public static final Aggregate.Group OTHER

Method Detail

values

public static Aggregate.Group[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (Aggregate.Group c : Aggregate.Group.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static Aggregate.Group valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

induce

public static Aggregate.Group induce(ImmutableBitSet groupSet,
                                     List<ImmutableBitSet> groupSets)

isRollup

public static boolean isRollup(ImmutableBitSet groupSet,
                               List<ImmutableBitSet> groupSets)

Returns whether a list of sets is a rollup.

For example, if groupSet is {2, 4, 5}, then [{2, 4, 5], {2, 5}, {5}, {}] is a rollup. The first item is equal to groupSet, and each subsequent item is a subset with one fewer bit than the previous.

See Also:

getRollup(List)

getRollup

public static List<Integer> getRollup(List<ImmutableBitSet> groupSets)

Returns the ordered list of bits in a rollup.

For example, given a groupSets value [{2, 4, 5], {2, 5}, {5}, {}], returns the list [5, 2, 4], which are the succession of bits added to each of the sets starting with the empty set.

See Also:

isRollup(ImmutableBitSet, List)