Package org.apache.calcite.materialize

Class Lattice.Measure

java.lang.Object

org.apache.calcite.materialize.Lattice.Measure

All Implemented Interfaces:

java.lang.Comparable<Lattice.Measure>

Enclosing class:

Lattice

public static class Lattice.Measure
extends java.lang.Object
implements java.lang.Comparable<Lattice.Measure>

A measure within a Lattice.

It is immutable.

Examples: SUM(products.weight), COUNT() (means "COUNT(*")), COUNT(DISTINCT customer.id).

Field Summary

Fields

Modifier and Type	Field	Description
SqlAggFunction	agg
com.google.common.collect.ImmutableList<Lattice.Column>	args
java.lang.String	digest
boolean	distinct
java.lang.String	name

Constructor Summary

Constructors

Constructor	Description
Measure(SqlAggFunction agg, boolean distinct, java.lang.String name, java.lang.Iterable<Lattice.Column> args)

Method Summary

Modifier and Type	Method	Description
ImmutableBitSet	argBitSet()	Returns the set of distinct argument ordinals.
java.util.List<java.lang.Integer>	argOrdinals()	Returns a list of argument ordinals.
private static int	compare(java.util.List<Lattice.Column> list0, java.util.List<Lattice.Column> list1)
int	compareTo(Lattice.Measure measure)
(package private) Lattice.Measure	copy(java.util.function.Function<Lattice.Column,Lattice.Column> mapper)	Copies this measure, mapping its arguments using a given function.
boolean	equals(java.lang.Object obj)
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

agg

public final SqlAggFunction agg

distinct

public final boolean distinct

name

@Nullable
public final java.lang.String name

args

public final com.google.common.collect.ImmutableList<Lattice.Column> args

digest

public final java.lang.String digest

Constructor Detail

Measure

public Measure(SqlAggFunction agg,
               boolean distinct,
               @Nullable
               java.lang.String name,
               java.lang.Iterable<Lattice.Column> args)

Method Detail

compareTo

public int compareTo(@Nonnull
                     Lattice.Measure measure)

Specified by:

compareTo in interface java.lang.Comparable<Lattice.Measure>

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

argBitSet

public ImmutableBitSet argBitSet()

Returns the set of distinct argument ordinals.

argOrdinals

public java.util.List<java.lang.Integer> argOrdinals()

Returns a list of argument ordinals.

compare

private static int compare(java.util.List<Lattice.Column> list0,
                           java.util.List<Lattice.Column> list1)

copy

Lattice.Measure copy(java.util.function.Function<Lattice.Column,Lattice.Column> mapper)

Copies this measure, mapping its arguments using a given function.