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  1. Rya
  2. RYA-416

Add the ability use the MongoDB aggregation pipeline to evaluate simple SPARQL expressions

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    Details

    • Type: New Feature
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.2.12
    • Component/s: None
    • Labels:
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      Description

      MongoDB provides the aggregation pipeline framework for multi-stage data processing. Currently, the query engine invokes this framework to apply individual statement patterns (using a "$match" expression for each and iterating through the results), then applies higher-level query operations (join, filter, select, project, etc) client-side.

      In principle, those high-level query operations could be rewritten as aggregation pipeline stages as well ($group, $match, $project, etc). This would allow more query evaluation logic to be executed by the MongoDB server itself, enabling server-side optimization. This could be used as a general query optimization, but would additionally be useful for any tool that only needed to write query results back to the server: adding a write step to the end of the resulting pipeline could obviate the need to communicate individual results to the client at all.

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              • Assignee:
                jhatfiel Jesse Hatfield
                Reporter:
                jhatfiel Jesse Hatfield
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                • Created:
                  Updated:
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