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https://issues.apache.org/jira/browse/MARMOTTA-367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14135212#comment-14135212
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ASF subversion and git services commented on MARMOTTA-367:
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Commit 0921acaa1e310beef16aa7ebdfd00e4170f89f49 in marmotta's branch
refs/heads/develop from [~wastl]
[ https://git-wip-us.apache.org/repos/asf?p=marmotta.git;h=0921aca ]
fix MARMOTTA-367 (OPTIONAL support) and MARMOTTA-494 (SPARQL builder)
> KiWi SPARQL: support for OPTIONAL
> ---------------------------------
>
> Key: MARMOTTA-367
> URL: https://issues.apache.org/jira/browse/MARMOTTA-367
> Project: Marmotta
> Issue Type: Sub-task
> Components: KiWi Triple Store
> Affects Versions: 3.1-incubating
> Reporter: Sebastian Schaffert
> Assignee: Sebastian Schaffert
> Fix For: 3.3.0
>
>
> 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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