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OData Extensions for Data Aggregation

OData Extensions for Data Aggregation. Ralf Handl, SAP Siva Harinath , Microsoft Hubert Heijkers, IBM Gerald Krause, SAP Mike Pizzo , Microsoft July 26 th , 2012. Where do we want to go. GET ~/Sales. GET ~/Sales?$select=Product.

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OData Extensions for Data Aggregation

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  1. OData Extensions for Data Aggregation Ralf Handl, SAP Siva Harinath, Microsoft Hubert Heijkers, IBM Gerald Krause, SAP Mike Pizzo, Microsoft July 26th, 2012

  2. Where do we want to go

  3. GET ~/Sales

  4. GET ~/Sales?$select=Product

  5. GET ~/Sales?$select=Product &$aggregate

  6. GET ~/Sales?$select=Product,Amount &$aggregate=Amount

  7. GET ~/Sales?$select=Product,Amount &$aggregate=Amount&$orderby=Amount desc

  8. GET ~/Sales?$select=Product,Amount &$aggregate=Amount&$filter=Amount ge 8

  9. GET ~/Sales?$select=Product,Revenue &$aggregate=Amount as Revenue&$filter=Amount ge 8

  10. GET ~/Sales?$select=Product,Amount,MaxAmount &$aggregate=sum(Amount) ,max(Amount) as MaxAmount

  11. GET ~/Sales?$select=Product,Amount &$aggregate=Amount ,count() as SalesCount

  12. $rollup=(Country,Customer),(ProductGroup,Product)

  13. Measures <PropertyName="Amount"Type="Decimal"> <TypeAnnotationTerm="DataAggregation.DependentMeasure"> <PropertyValueProperty="DefaultAggregationFunction" String="sum"> <PropertyValueProperty="AcceptedAggregationFunctions"> <Collection> <String="sum"/> <String="max"/> </Collection> </PropertyValue> </TypeAnnotation> </Property>

  14. Hierarchies <PropertyName="ProductGroup"Type="String"Nullable="false" /> <PropertyName="Product" Type="String"Nullable="false" /> <TypeAnnotationTerm="DataAggregation.LeveledHierarchy"> <PropertyValueProperty="Name"String="ProductHierarchy"/> <PropertyValueProperty="Levels"> <Collection> <String="ProductGroup"/> <String="Product"/> </Collection> </PropertyValue> </TypeAnnotation>

  15. Open Topics • Links for „drillinginto“ aggregatedentities • More hierarchytypes: parent-child, ragged, … • Hierarchy-basedfunctions: descendants(), siblings() • Expressionsin $aggregate: sum(Revenue) - sum(Costs) asProfit • Split into $filter and $postfilter (WHERE/HAVING) • Merge$aggregateand $select, implicit $expand • Set functions for complex aggregations: ~/MySet/$Select(city,sales)/$Aggregate(sales)/$Select(sales)/$Aggregate() • References to annotations for units/currencies/texts

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