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Daanse Tutorial - Writeback Table ​

This tutorial discusses writeback with fact as Table.

Database Schema ​

The Database Schema contains the

  • FACT table with 3 columns VAL, VAL1, L2. The L2 column is used as the discriminator in the Level and Hierarchy definitions
  • L1 table with two columns: L1 and L2.
  • L2 table with one column: L2.
  • FACTWB table with 4 columns: VAL, VAL1, ID, USER.
xml
<relational:Schema xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI"  xmlns:relational="http://www.omg.org/spec/CWM/1.1/resource/relational" xmi:id="_schema">
  <ownedElement xsi:type="relational:Table" xmi:id="_table_fact" name="FACT">
    <feature xsi:type="relational:Column" xmi:id="_column_fact_val" name="VAL"/>
    <feature xsi:type="relational:Column" xmi:id="_column_fact_val1" name="VAL1"/>
    <feature xsi:type="relational:Column" xmi:id="_column_fact_l2" name="L2"/>
  </ownedElement>
  <ownedElement xsi:type="relational:Table" xmi:id="_table_l1" name="L1">
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l1" name="L1"/>
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l2" name="L2"/>
  </ownedElement>
  <ownedElement xsi:type="relational:Table" xmi:id="_table_l2" name="L2">
    <feature xsi:type="relational:Column" xmi:id="_column_l2_l2" name="L2"/>
  </ownedElement>
  <ownedElement xsi:type="relational:Table" xmi:id="_table_factwb" name="FACTWB">
    <feature xsi:type="relational:Column" xmi:id="_column_factwb_val" name="VAL"/>
    <feature xsi:type="relational:Column" xmi:id="_column_factwb_val1" name="VAL1"/>
    <feature xsi:type="relational:Column" xmi:id="_column_factwb_l2" name="L2"/>
    <feature xsi:type="relational:Column" xmi:id="_column_factwb_id" name="ID"/>
    <feature xsi:type="relational:Column" xmi:id="_column_factwb_user" name="USER"/>
  </ownedElement>
</relational:Schema>

Note: This is only a symbolic example. For the exact definition, see the Definition section.

FactQuery ​

The FactQuery is a simple TableSource that selects all columns from the Fact table to use in the cube for the measures.

xml
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI"  xmlns:relational="http://www.omg.org/spec/CWM/1.1/resource/relational" xmlns:rolapsrc="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/database/source">
  <rolapsrc:TableSource xmi:id="_tablesource_fact" table="_table_fact"/>
  <relational:Table xmi:id="_table_fact" name="FACT">
    <feature xsi:type="relational:Column" xmi:id="_column_fact_val" name="VAL"/>
    <feature xsi:type="relational:Column" xmi:id="_column_fact_val1" name="VAL1"/>
    <feature xsi:type="relational:Column" xmi:id="_column_fact_l2" name="L2"/>
  </relational:Table>
</xmi:XMI>

Note: This is only a symbolic example. For the exact definition, see the Definition section.

l1TableQuery ​

The l1TableQuery is a simple TableSource that selects all columns from the L1 table to use in the cube for the L1 level.

xml
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI"  xmlns:relational="http://www.omg.org/spec/CWM/1.1/resource/relational" xmlns:rolapsrc="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/database/source">
  <rolapsrc:TableSource xmi:id="_tablesource_l1" table="_table_l1"/>
  <relational:Table xmi:id="_table_l1" name="L1">
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l1" name="L1"/>
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l2" name="L2"/>
  </relational:Table>
</xmi:XMI>

Note: This is only a symbolic example. For the exact definition, see the Definition section.

l21TableQuery ​

The l2TableQuery is a simple TableSource that selects all columns from the L2 table to use in the cube for the L2 level.

xml
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI"  xmlns:relational="http://www.omg.org/spec/CWM/1.1/resource/relational" xmlns:rolapsrc="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/database/source">
  <rolapsrc:TableSource xmi:id="_tablesource_l2" table="_table_l2"/>
  <relational:Table xmi:id="_table_l2" name="L2">
    <feature xsi:type="relational:Column" xmi:id="_column_l2_l2" name="L2"/>
  </relational:Table>
</xmi:XMI>

Note: This is only a symbolic example. For the exact definition, see the Definition section.

join ​

The join is a simple JoinedQuery that unites l1TableQuery and l2TableQuery by L2 column.

xml
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI"  xmlns:relational="http://www.omg.org/spec/CWM/1.1/resource/relational" xmlns:rolapsrc="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/database/source">
  <rolapsrc:JoinSource xmi:id="_joinsource">
    <left xmi:id="_joinedqueryelement_l2" key="_column_l1_l2" source="_tablesource_l1"/>
    <right xmi:id="_joinedqueryelement_l2_1" key="_column_l2_l2" source="_tablesource_l2"/>
  </rolapsrc:JoinSource>
  <relational:Table xmi:id="_table_l1" name="L1">
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l1" name="L1"/>
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l2" name="L2"/>
  </relational:Table>
  <relational:Table xmi:id="_table_l2" name="L2">
    <feature xsi:type="relational:Column" xmi:id="_column_l2_l2" name="L2"/>
  </relational:Table>
  <rolapsrc:TableSource xmi:id="_tablesource_l2" table="_table_l2"/>
  <rolapsrc:TableSource xmi:id="_tablesource_l1" table="_table_l1"/>
</xmi:XMI>

Note: This is only a symbolic example. For the exact definition, see the Definition section.

L1 ​

This Example uses one simple L1 level based on the L1 column. L2 column to use for connection to level L2

xml
<rolaplev:Level xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:rolaplev="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension/hierarchy/level" xmi:id="_level_l1" name="L1">
  <column href="_column_l1_l1"/>
</rolaplev:Level>

Note: This is only a symbolic example. For the exact definition, see the Definition section.

L2 ​

This Example uses one simple L2 level based on the L2 column. L2 column to use for connection to level L1

xml
<rolaplev:Level xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI" xmlns:rolaplev="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension/hierarchy/level" xmi:id="_level_l2" name="L2">
  <column href="_column_l2_l2"/>
</rolaplev:Level>

Note: This is only a symbolic example. For the exact definition, see the Definition section.

HierarchyWithHasAll ​

The Hierarchy is defined with the hasAll property set to true and the two levels.

xml
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI"  xmlns:relational="http://www.omg.org/spec/CWM/1.1/resource/relational" xmlns:rolaphier="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension/hierarchy" xmlns:rolaplev="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension/hierarchy/level" xmlns:rolapsrc="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/database/source">
  <rolaphier:ExplicitHierarchy xmi:id="_explicithierarchy_hierarchywithhasall" name="HierarchyWithHasAll" primaryKey="_column_l1_l2" source="_joinsource" levels="_level_l1 _level_l2"/>
  <relational:Table xmi:id="_table_l1" name="L1">
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l1" name="L1"/>
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l2" name="L2"/>
  </relational:Table>
  <relational:Table xmi:id="_table_l2" name="L2">
    <feature xsi:type="relational:Column" xmi:id="_column_l2_l2" name="L2"/>
  </relational:Table>
  <rolapsrc:JoinSource xmi:id="_joinsource">
    <left xmi:id="_joinedqueryelement_l2" key="_column_l1_l2" source="_tablesource_l1"/>
    <right xmi:id="_joinedqueryelement_l2_1" key="_column_l2_l2" source="_tablesource_l2"/>
  </rolapsrc:JoinSource>
  <rolaplev:Level xmi:id="_level_l1" name="L1" column="_column_l1_l1"/>
  <rolaplev:Level xmi:id="_level_l2" name="L2" column="_column_l2_l2"/>
  <rolapsrc:TableSource xmi:id="_tablesource_l2" table="_table_l2"/>
  <rolapsrc:TableSource xmi:id="_tablesource_l1" table="_table_l1"/>
</xmi:XMI>

Note: This is only a symbolic example. For the exact definition, see the Definition section.

Dimension ​

The dimension is defined with the one hierarchy.

xml
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI"  xmlns:relational="http://www.omg.org/spec/CWM/1.1/resource/relational" xmlns:rolapdim="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension" xmlns:rolaphier="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension/hierarchy" xmlns:rolaplev="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension/hierarchy/level" xmlns:rolapsrc="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/database/source">
  <rolapdim:StandardDimension xmi:id="_standarddimension_d1" name="D1" hierarchies="_explicithierarchy_hierarchywithhasall"/>
  <relational:Table xmi:id="_table_l1" name="L1">
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l1" name="L1"/>
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l2" name="L2"/>
  </relational:Table>
  <relational:Table xmi:id="_table_l2" name="L2">
    <feature xsi:type="relational:Column" xmi:id="_column_l2_l2" name="L2"/>
  </relational:Table>
  <rolapsrc:JoinSource xmi:id="_joinsource">
    <left xmi:id="_joinedqueryelement_l2" key="_column_l1_l2" source="_tablesource_l1"/>
    <right xmi:id="_joinedqueryelement_l2_1" key="_column_l2_l2" source="_tablesource_l2"/>
  </rolapsrc:JoinSource>
  <rolaplev:Level xmi:id="_level_l1" name="L1" column="_column_l1_l1"/>
  <rolaplev:Level xmi:id="_level_l2" name="L2" column="_column_l2_l2"/>
  <rolapsrc:TableSource xmi:id="_tablesource_l2" table="_table_l2"/>
  <rolaphier:ExplicitHierarchy xmi:id="_explicithierarchy_hierarchywithhasall" name="HierarchyWithHasAll" primaryKey="_column_l1_l2" source="_joinsource" levels="_level_l1 _level_l2"/>
  <rolapsrc:TableSource xmi:id="_tablesource_l1" table="_table_l1"/>
</xmi:XMI>

Note: This is only a symbolic example. For the exact definition, see the Definition section.

Cubec C ​

Cube C is defined by DimensionConnector D1 and a MeasureGroup containing two measures using SUM aggregation. The cube also contains a FACTWB WritebackTable configuration with a WritebackAttribute mapped to the VAL column from the fact table, along with two WritebackMeasures: Measure1 and Measure2.

xml
<xmi:XMI xmi:version="2.0" xmlns:xmi="http://www.omg.org/XMI"  xmlns:relational="http://www.omg.org/spec/CWM/1.1/resource/relational" xmlns:rolapcube="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/cube" xmlns:rolapdim="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension" xmlns:rolaphier="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension/hierarchy" xmlns:rolaplev="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension/hierarchy/level" xmlns:rolapmeas="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/cube/measure" xmlns:rolapsrc="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/database/source">
  <rolapcube:PhysicalCube xmi:id="_physicalcube_c" name="C" source="_tablesource_fact">
    <dimensionConnectors xmi:id="_dimensionconnector_d1" dimension="_standarddimension_d1" overrideDimensionName="D1">
      <foreignKey href="_column_l1_l2"/>
    </dimensionConnectors>
    <writebackTable xmi:id="_writebacktable_factwb" name="FACTWB">
      <writebackAttribute xmi:id="_writebackattribute_l2" column="_column_fact_l2" dimensionConnector="_dimensionconnector_d1"/>
      <writebackMeasure xmi:id="_writebackmeasure_measure1" column="_column_fact_val" name="Measure1"/>
      <writebackMeasure xmi:id="_writebackmeasure_measure2" column="_column_fact_val1" name="Measure2"/>
    </writebackTable>
    <measureGroups xmi:id="_measuregroup">
      <measures xsi:type="rolapmeas:SumMeasure" xmi:id="_summeasure_measure1" name="Measure1" column="_column_fact_val"/>
      <measures xsi:type="rolapmeas:SumMeasure" xmi:id="_summeasure_measure2" name="Measure2" column="_column_fact_val1"/>
    </measureGroups>
  </rolapcube:PhysicalCube>
  <relational:Table xmi:id="_table_l1" name="L1">
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l1" name="L1"/>
    <feature xsi:type="relational:Column" xmi:id="_column_l1_l2" name="L2"/>
  </relational:Table>
  <rolapsrc:TableSource xmi:id="_tablesource_fact" table="_table_fact"/>
  <relational:Table xmi:id="_table_l2" name="L2">
    <feature xsi:type="relational:Column" xmi:id="_column_l2_l2" name="L2"/>
  </relational:Table>
  <rolapsrc:JoinSource xmi:id="_joinsource">
    <left xmi:id="_joinedqueryelement_l2" source="_tablesource_l1">
      <key href="_column_l1_l2"/>
    </left>
    <right xmi:id="_joinedqueryelement_l2_1" source="_tablesource_l2">
      <key href="_column_l2_l2"/>
    </right>
  </rolapsrc:JoinSource>
  <rolaplev:Level xmi:id="_level_l1" name="L1">
    <column href="_column_l1_l1"/>
  </rolaplev:Level>
  <rolaplev:Level xmi:id="_level_l2" name="L2">
    <column href="_column_l2_l2"/>
  </rolaplev:Level>
  <rolapsrc:TableSource xmi:id="_tablesource_l2" table="_table_l2"/>
  <rolapdim:StandardDimension xmi:id="_standarddimension_d1" name="D1" hierarchies="_explicithierarchy_hierarchywithhasall"/>
  <rolaphier:ExplicitHierarchy xmi:id="_explicithierarchy_hierarchywithhasall" name="HierarchyWithHasAll" source="_joinsource" levels="_level_l1 _level_l2">
    <primaryKey href="_column_l1_l2"/>
  </rolaphier:ExplicitHierarchy>
  <rolapsrc:TableSource xmi:id="_tablesource_l1" table="_table_l1"/>
  <relational:Table xmi:id="_table_fact" name="FACT">
    <feature xsi:type="relational:Column" xmi:id="_column_fact_val" name="VAL"/>
    <feature xsi:type="relational:Column" xmi:id="_column_fact_val1" name="VAL1"/>
    <feature xsi:type="relational:Column" xmi:id="_column_fact_l2" name="L2"/>
  </relational:Table>
</xmi:XMI>

Note: This is only a symbolic example. For the exact definition, see the Definition section.

Definition ​

This file represents 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:relational="http://www.omg.org/spec/CWM/1.1/resource/relational" xmlns:rolapcat="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/catalog" xmlns:rolapcube="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/cube" xmlns:rolapdim="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension" xmlns:rolaphier="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension/hierarchy" xmlns:rolaplev="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/dimension/hierarchy/level" xmlns:rolapmeas="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/olap/cube/measure" xmlns:rolapsrc="https://www.daanse.org/spec/org.eclipse.daanse.rolap.mapping/database/source">
  <relational:SQLSimpleType xmi:id="_sqlsimpletype_character_varying" name="CHARACTER VARYING" structuralFeature="_column_factwb_id _column_l1_l1 _column_factwb_l2 _column_l2_l2 _column_l1_l2 _column_fact_l2 _column_factwb_user" typeNumber="12"/>
  <relational:SQLSimpleType xmi:id="_sqlsimpletype_integer" name="INTEGER" structuralFeature="_column_factwb_val1 _column_fact_val _column_factwb_val _column_fact_val1" typeNumber="4"/>
  <rolapcat:Catalog xmi:id="_catalog_writeback_table" description="Table-based writeback functionality" name="Daanse Tutorial - Writeback Table" cubes="_physicalcube_c" dbschemas="_schema"/>
  <relational:Schema xmi:id="_schema">
    <ownedElement xsi:type="relational:Table" xmi:id="_table_fact" name="FACT">
      <feature xsi:type="relational:Column" xmi:id="_column_fact_val" name="VAL" type="_sqlsimpletype_integer"/>
      <feature xsi:type="relational:Column" xmi:id="_column_fact_val1" name="VAL1" type="_sqlsimpletype_integer"/>
      <feature xsi:type="relational:Column" xmi:id="_column_fact_l2" name="L2" type="_sqlsimpletype_character_varying"/>
    </ownedElement>
    <ownedElement xsi:type="relational:Table" xmi:id="_table_l1" name="L1">
      <feature xsi:type="relational:Column" xmi:id="_column_l1_l1" name="L1" type="_sqlsimpletype_character_varying"/>
      <feature xsi:type="relational:Column" xmi:id="_column_l1_l2" name="L2" type="_sqlsimpletype_character_varying"/>
    </ownedElement>
    <ownedElement xsi:type="relational:Table" xmi:id="_table_l2" name="L2">
      <feature xsi:type="relational:Column" xmi:id="_column_l2_l2" name="L2" type="_sqlsimpletype_character_varying"/>
    </ownedElement>
    <ownedElement xsi:type="relational:Table" xmi:id="_table_factwb" name="FACTWB">
      <feature xsi:type="relational:Column" xmi:id="_column_factwb_val" name="VAL" type="_sqlsimpletype_integer"/>
      <feature xsi:type="relational:Column" xmi:id="_column_factwb_val1" name="VAL1" type="_sqlsimpletype_integer"/>
      <feature xsi:type="relational:Column" xmi:id="_column_factwb_l2" name="L2" type="_sqlsimpletype_character_varying"/>
      <feature xsi:type="relational:Column" xmi:id="_column_factwb_id" name="ID" type="_sqlsimpletype_character_varying"/>
      <feature xsi:type="relational:Column" xmi:id="_column_factwb_user" name="USER" type="_sqlsimpletype_character_varying"/>
    </ownedElement>
  </relational:Schema>
  <rolapsrc:TableSource xmi:id="_tablesource_l1" table="_table_l1"/>
  <rolapsrc:TableSource xmi:id="_tablesource_fact" table="_table_fact"/>
  <rolapsrc:TableSource xmi:id="_tablesource_l2" table="_table_l2"/>
  <rolapsrc:JoinSource xmi:id="_joinsource">
    <left xmi:id="_joinedqueryelement_l2_1" key="_column_l1_l2" source="_tablesource_l1"/>
    <right xmi:id="_joinedqueryelement_l2" key="_column_l2_l2" source="_tablesource_l2"/>
  </rolapsrc:JoinSource>
  <rolaplev:Level xmi:id="_level_l1" name="L1" column="_column_l1_l1"/>
  <rolaplev:Level xmi:id="_level_l2" name="L2" column="_column_l2_l2"/>
  <rolaphier:ExplicitHierarchy xmi:id="_explicithierarchy_hierarchywithhasall" name="HierarchyWithHasAll" primaryKey="_column_l1_l2" source="_joinsource" levels="_level_l1 _level_l2"/>
  <rolapdim:StandardDimension xmi:id="_standarddimension_d1" name="D1" hierarchies="_explicithierarchy_hierarchywithhasall"/>
  <rolapcube:PhysicalCube xmi:id="_physicalcube_c" name="C" source="_tablesource_fact">
    <dimensionConnectors xmi:id="_dimensionconnector_d1" foreignKey="_column_l1_l2" dimension="_standarddimension_d1" overrideDimensionName="D1"/>
    <writebackTable xmi:id="_writebacktable_factwb" name="FACTWB">
      <writebackAttribute xmi:id="_writebackattribute_l2" column="_column_fact_l2" dimensionConnector="_dimensionconnector_d1"/>
      <writebackMeasure xmi:id="_writebackmeasure_measure1" column="_column_fact_val" name="Measure1"/>
      <writebackMeasure xmi:id="_writebackmeasure_measure2" column="_column_fact_val1" name="Measure2"/>
    </writebackTable>
    <measureGroups xmi:id="_measuregroup">
      <measures xsi:type="rolapmeas:SumMeasure" xmi:id="_summeasure_measure1" name="Measure1" column="_column_fact_val"/>
      <measures xsi:type="rolapmeas:SumMeasure" xmi:id="_summeasure_measure2" name="Measure2" column="_column_fact_val1"/>
    </measureGroups>
  </rolapcube:PhysicalCube>
</xmi:XMI>

Tutorial Zip ​

This file contains the data-tables as csv and the mapping as xmi file.

Download Zip File

Released under the Eclipse Public License 2.0

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