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https://issues.apache.org/jira/browse/OAK-937?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alex Parvulescu updated OAK-937:
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Fix Version/s: (was: 1.2)
1.3.0
> Query engine index selection tweaks: shortcut and hint
> ------------------------------------------------------
>
> Key: OAK-937
> URL: https://issues.apache.org/jira/browse/OAK-937
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, query
> Reporter: Alex Parvulescu
> Priority: Minor
> Fix For: 1.3.0
>
>
> This issue covers 2 different changes related to the way the QueryEngine
> selects a query index:
> Firstly there could be a way to end the index selection process early via a
> known constant value: if an index returns a known value token (like -1000)
> then the query engine would effectively stop iterating through the existing
> index impls and use that index directly.
> Secondly it would be nice to be able to specify a desired index (if one is
> known to perform better) thus skipping the existing selection mechanism (cost
> calculation and comparison). This could be done via certain query hints [0].
> [0] http://en.wikipedia.org/wiki/Hint_(SQL)
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