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Posted to oak-issues@jackrabbit.apache.org by "Przemo Pakulski (JIRA)" <ji...@apache.org> on 2015/04/15 17:55:58 UTC

[jira] [Created] (OAK-2777) Minimize the cost calculation for queries using reference restrictions.

Przemo Pakulski created OAK-2777:
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             Summary: Minimize the cost calculation for queries using reference restrictions.
                 Key: OAK-2777
                 URL: https://issues.apache.org/jira/browse/OAK-2777
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.2, 1.1.2
            Reporter: Przemo Pakulski


According to the javadocs (QueryIndex) minimum cost for index is 1. Currently ReferenceIndex returns this minimum value, when it can be used for the query.

But even than remaining indexes are still calculated. We could skip cost calculation of remaining indexes if we achieved the minimum cost already.
It will speed up all queries which can leverage the reference Index.

Example query:

SELECT * FROM [nt:base] WHERE PROPERTY([rep:members], 'WeakReference') = '345bef9b-ffa1-3e09-85df-1e03cfa0fb37'



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