org.pentaho.aggdes.model

Interface Aggregate

All Known Implementing Classes:

AggregateImpl

public interface Aggregate

Aggregate, also known as an aggregate table, or summary table. Generated by the algorithm.

Method Summary

Methods

Modifier and Type	Method and Description
double	estimateRowCount() Returns an estimate of the number of distinct values in this Aggregate.
double	estimateSpace() Returns an estimate of the amount of space (in bytes) required to store this Aggregate.
List<Attribute>	getAttributes() Returns a list of attributes in this aggregate table.
String	getCandidateTableName() Returns a suggestion for the name of a table in which to store this aggregate.
String	getDescription() Returns a text description of this aggregate
List<Measure>	getMeasures() Returns a list of measures in this aggregate table.

Method Detail

getCandidateTableName

String getCandidateTableName()

Returns a suggestion for the name of a table in which to store this aggregate.

The suggestion does not need to be unique within the db schema or less than the database's table name limit, but the implementation should try to generate a name that is likely to be unique and descriptive in the first 20 or so characters.

Returns:

candidate table name

getDescription

String getDescription()

Returns a text description of this aggregate

Returns:

description of aggregate

getAttributes

List<Attribute> getAttributes()

Returns a list of attributes in this aggregate table.

Returns:

list of attributes in this aggregate table

getMeasures

List<Measure> getMeasures()

Returns a list of measures in this aggregate table.

Returns:

list of measures in this aggregate table

estimateRowCount

double estimateRowCount()

Returns an estimate of the number of distinct values in this Aggregate.

Returns:

estimated number of distinct values

estimateSpace

double estimateSpace()

Returns an estimate of the amount of space (in bytes) required to store this Aggregate.

Returns:

estimated space in bytes