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https://issues.apache.org/jira/browse/OAK-4081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15561242#comment-15561242
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Chetan Mehrotra commented on OAK-4081:
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Some optimization is now implemented in OAk-4904 wrt unique indexes. Reordering
within property index is still pending
> Faster cost calculation for property indexes and traversal
> ----------------------------------------------------------
>
> Key: OAK-4081
> URL: https://issues.apache.org/jira/browse/OAK-4081
> Project: Jackrabbit Oak
> Issue Type: Bug
> Components: query
> Reporter: Thomas Mueller
> Assignee: Thomas Mueller
> Fix For: 1.6
>
>
> There are sometimes many property indexes, therefore cost calculation is
> slow. As seen in OAK-4076, we could re-order the indexes and stop once we
> found a good one (specially for unique indexes).
> Also, currently we still check if traversal is faster than using an index. In
> many cases this check is not needed.
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