Sebastian Schaffert created MARMOTTA-367:
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Summary: KiWi SPARQL: support for OPTIONAL
Key: MARMOTTA-367
URL: https://issues.apache.org/jira/browse/MARMOTTA-367
Project: Marmotta
Issue Type: Improvement
Components: KiWi Triple Store
Affects Versions: 3.1-incubating
Reporter: Sebastian Schaffert
Assignee: Sebastian Schaffert
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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