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From "Davide Giannella (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (OAK-2777) Minimize the cost calculation for queries using reference restrictions.
Date Tue, 04 Jun 2019 15:35:11 GMT

     [ https://issues.apache.org/jira/browse/OAK-2777?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Davide Giannella updated OAK-2777:
----------------------------------
    Fix Version/s: 1.16.0

> 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, query
>    Affects Versions: 1.1.2, 1.2
>            Reporter: Przemo Pakulski
>            Assignee: Thomas Mueller
>            Priority: Major
>              Labels: performance
>             Fix For: 1.14.0, 1.16.0
>
>         Attachments: oak-2777.patch
>
>
> 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 then cost for remaining indexes is 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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