Package 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

    Modifier and Type
    Method
    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 Details

    • 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