org.pentaho.aggdes.model

Interface Schema

public interface Schema

Star schema.

A star schema is a collection of tables: a central fact table, and several dimension tables. Each table except the fact table is joined to a parent table.

Method Summary

Methods

Modifier and Type	Method and Description
String	generateAggregateSql(Aggregate aggregate, List<String> columnNameList) Converts an aggregate to a SELECT statement.
List<? extends Attribute>	getAttributes() Returns a list of all attributes in this schema.
Dialect	getDialect() Returns the dialect of the underlying database.
List<? extends Dimension>	getDimensions() Returns a list of Dimension objects in the schema;
List<Measure>	getMeasures() Returns a list of Measure objects in the schema.
StatisticsProvider	getStatisticsProvider() Returns the statistics provider for this Schema.
List<? extends Table>	getTables() Returns a list of all Table objects in the schema.

Method Detail

getTables

List<? extends Table> getTables()

Returns a list of all Table objects in the schema.

Returns:

list of tables

getMeasures

List<Measure> getMeasures()

Returns a list of Measure objects in the schema.

Returns:

list of measures

getDimensions

List<? extends Dimension> getDimensions()

Returns a list of Dimension objects in the schema;

Returns:

getAttributes

List<? extends Attribute> getAttributes()

Returns a list of all attributes in this schema.

Returns:

list of all attributes in all tables

getStatisticsProvider

StatisticsProvider getStatisticsProvider()

Returns the statistics provider for this Schema.

Returns:

statistics provider

getDialect

Dialect getDialect()

Returns the dialect of the underlying database.

Returns:

dialect

generateAggregateSql

String generateAggregateSql(Aggregate aggregate,
                          List<String> columnNameList)

Converts an aggregate to a SELECT statement. Uses the schema's SQL dialect.

Parameters:

aggregate - Aggregate

columnNameList - List of column names, one per attribute

Returns:

SQL SELECT statement to populate aggregate