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OASIS Open Data Protocol (OData) TC

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  1. OASIS Open Data Protocol (OData) TC
  2. ODATA-968

3.1.4: add example for from in aggregate() with multiple arguments

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: V4.0_CSD03
    • Fix Version/s: V4.0_CSD04
    • Component/s: Data Aggregation
    • Labels:
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    • Environment:

      Applied

    • Proposal:
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      require that all explicitly mentioned "from" properties appear in the same order in all arguments

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      require that all explicitly mentioned "from" properties appear in the same order in all arguments

      Description

      Explain how in aggregate() with multiple arguments the "from" keyword can be resolved into a groupby/aggregate sequence by initially grouping by all "from" properties appearing in any argument.

      Will probably work only if all "from" chains are compatible, i.e. there exists a "super-chain" so that any from chain is a sub-chain of this super-chain.

      1) from A from B from D,from A from C from D works with super-chain from A from B from C from D (B and C can be swapped to get another possible super-chain.

      2) from A from B, from B from A won't work

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          handl Ralf Handl added a comment -

          Give rationale why the "from" syntax is helpful, given that it can alternatively be expressed as a chain of groupby/aggregate operations which forces clients to explicitly specify the "super-chain" they want to be used for the aggregation.

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          handl Ralf Handl added a comment - Give rationale why the "from" syntax is helpful, given that it can alternatively be expressed as a chain of groupby/aggregate operations which forces clients to explicitly specify the "super-chain" they want to be used for the aggregation.
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          mikep Michael Pizzo (Inactive) added a comment -

          Resolved as proposed 2018-7-19.

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          mikep Michael Pizzo (Inactive) added a comment - Resolved as proposed 2018-7-19.
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          heiko.theissen Heiko Theissen added a comment - - edited

          TC 2022-08-04: The uniformity requirement for from properties is dropped during the walkthrough of OData-Aggr CSD04.

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          heiko.theissen Heiko Theissen added a comment - - edited TC 2022-08-04: The uniformity requirement for  from properties is dropped during the walkthrough of OData-Aggr CSD04.

            People

            • Assignee:
              Unassigned
              Reporter:
              handl Ralf Handl
            • Watchers:
              1 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: