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  1. Marmotta (Retired)
  2. MARMOTTA-493 Improve Native SPARQL Support
  3. MARMOTTA-367

KiWi SPARQL: support for OPTIONAL

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    • Sub-task
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 3.1-incubating
    • 3.3.0
    • KiWi Triple Store
    • None

    Description

      The OPTIONAL construct is very popular among SPARQL users, but currently not directly supported by the KiWi SPARQL optimizations. We should investigate how OPTIONAL can properly be translated into a SQL LEFT OUTER JOIN to improve the performance of such queries.

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            wastl Sebastian Schaffert
            wastl Sebastian Schaffert
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              Created:
              Updated:
              Resolved: