Multiple Percentile Aggragator Measures
Data cubes have percentile measures.
Database Schema
The cube defined in this example is based on a single table that stores all the data. The table, named Fact, contains two columns: KEY and VALUE. The KEY column acts as a discriminator, while the VALUE column holds the measurements to be aggregated.
xml
<roma:DatabaseSchema id="_databaseSchema">
<tables xsi:type="roma:PhysicalTable" id="_tab" name="Fact">
<columns xsi:type="roma:PhysicalColumn" id="_col_key" name="KEY"/>
<columns xsi:type="roma:PhysicalColumn" id="_col" name="VALUE" type="Integer"/>
</tables>
</roma:DatabaseSchema>Note: This is only a symbolic example. For the exact definition, see the Definition section.
Query
This example uses a TableQuery, as it directly references the physical table Fact.
xml
<roma:TableQuery id="_query" table="_tab"/>Note: This is only a symbolic example. For the exact definition, see the Definition section.
Cube, MeasureGroup and Multiple Percentile Aggragator Measures
In this example, multiple measures are defined. All measures reference the VALUE column and use the following aggregation functions:
- Percentile disc 0.25 – Percentile 'disc' 0.25.
- Percentile cont 0.25 – Percentile 'cont' 0.25.
- Percentile disc 0.42 – Percentile 'disc' 0.42.
- Percentile cont 0.42 – Percentile 'cont' 0.42.
- Percentile disc 0.5 – Percentile 'disc' 0.5.
- Percentile cont 0.5 – Percentile 'cont' 0.5.
- Percentile disc 0.75 – Percentile 'disc' 0.75.
- Percentile cont 0.75 – Percentile 'cont' 0.75.
- Percentile disc 1.0 – Percentile 'disc' 1.00.
- Percentile cont 1.0 – Percentile 'cont' 1.00.
xml
<roma:PhysicalCube id="_cube" name="MeasuresAggregatorsCube" query="_query">
<dimensionConnectors foreignKey="roma:PhysicalColumn _col_key" dimension="roma:StandardDimension _diml" overrideDimensionName="Dim"/>
<measureGroups>
<measures xsi:type="roma:PercentileMeasure" id="_measure1" name="Percentile disc 0.25" column="_orderedColumn" percentile="0.25"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure2" name="Percentile cont 0.25" column="_orderedColumn" percentType="cont" percentile="0.25"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure3" name="Percentile disc 0.42" column="_orderedColumn" percentile="0.42"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure4" name="Percentile cont 0.42" column="_orderedColumn" percentType="cont" percentile="0.42"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure5" name="Percentile disc 0.5" column="_orderedColumn" percentile="0.5"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure6" name="Percentile cont 0.5" column="_orderedColumn" percentType="cont" percentile="0.5"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure7" name="Percentile disc 0.75" column="_orderedColumn" percentile="0.75"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure8" name="Percentile cont 0.75" column="_orderedColumn" percentType="cont" percentile="0.75"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure9" name="Percentile disc 1.00" column="_orderedColumn"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure10" name="Percentile cont 1.00" column="_orderedColumn" percentType="cont"/>
</measureGroups>
</roma:PhysicalCube>Note: This is only a symbolic example. For the exact definition, see the Definition section.
Definition
This files represent the complete definition of the catalog.
xml
<?xml version="1.0" encoding="UTF-8"?>
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:roma="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping">
<roma:OrderedColumn id="_orderedColumn" column="_col"/>
<roma:Catalog name="Measure - Percentile Aggragator" cubes="_cube" dbschemas="_databaseSchema"/>
<roma:DatabaseSchema id="_databaseSchema">
<tables xsi:type="roma:PhysicalTable" id="_tab" name="Fact">
<columns xsi:type="roma:PhysicalColumn" id="_col_key" name="KEY"/>
<columns xsi:type="roma:PhysicalColumn" id="_col" name="VALUE" type="Integer"/>
</tables>
</roma:DatabaseSchema>
<roma:TableQuery id="_query" table="_tab"/>
<roma:Level id="_level" name="Level" column="_col_key"/>
<roma:Hierarchy id="Hierarchy" name="Hierarchy" levels="_level" hasAll="true" primaryKey="_col_key" query="_query"/>
<roma:StandardDimension id="_diml" name="Diml" hierarchies="Hierarchy"/>
<roma:PhysicalCube id="_cube" name="MeasuresAggregatorsCube" query="_query">
<dimensionConnectors foreignKey="_col_key" dimension="_diml" overrideDimensionName="Dim"/>
<measureGroups>
<measures xsi:type="roma:PercentileMeasure" id="_measure1" name="Percentile disc 0.25" column="_orderedColumn" percentile="0.25"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure2" name="Percentile cont 0.25" column="_orderedColumn" percentType="cont" percentile="0.25"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure3" name="Percentile disc 0.42" column="_orderedColumn" percentile="0.42"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure4" name="Percentile cont 0.42" column="_orderedColumn" percentType="cont" percentile="0.42"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure5" name="Percentile disc 0.5" column="_orderedColumn" percentile="0.5"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure6" name="Percentile cont 0.5" column="_orderedColumn" percentType="cont" percentile="0.5"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure7" name="Percentile disc 0.75" column="_orderedColumn" percentile="0.75"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure8" name="Percentile cont 0.75" column="_orderedColumn" percentType="cont" percentile="0.75"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure9" name="Percentile disc 1.00" column="_orderedColumn"/>
<measures xsi:type="roma:PercentileMeasure" id="_measure10" name="Percentile cont 1.00" column="_orderedColumn" percentType="cont"/>
</measureGroups>
</roma:PhysicalCube>
</xmi:XMI>Turorial Zip
This files contaisn the data-tables as csv and the mapping as xmi file.