org.pentaho.aggdes.model

Interface Measure

All Superinterfaces:

Attribute

public interface Measure
extends Attribute

A quantity of interest in a star schema.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isDistinct() Returns whether this measure is a distinct aggregation, such as distinct-count.

Methods inherited from interface org.pentaho.aggdes.model.Attribute

estimateSpace, getAncestorAttributes, getCandidateColumnName, getDatatype, getLabel, getTable

Method Detail

isDistinct

boolean isDistinct()

Returns whether this measure is a distinct aggregation, such as distinct-count.

Distinct aggregations cannot be rolled up, in general, so more aggregate tables are required for the same performance gain.

Returns:

whether the measure is distinct