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https://issues.apache.org/jira/browse/LUCENE-7055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-7055.
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Resolution: Fixed
Fix Version/s: 6.5
master (7.0)
> Better execution path for costly queries
> ----------------------------------------
>
> Key: LUCENE-7055
> URL: https://issues.apache.org/jira/browse/LUCENE-7055
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Fix For: master (7.0), 6.5
>
> Attachments: LUCENE-7055.patch, LUCENE-7055.patch, LUCENE-7055.patch
>
>
> In Lucene 5.0, we improved the execution path for queries that run costly
> operations on a per-document basis, like phrase queries or doc values
> queries. But we have another class of costly queries, that return fine
> iterators, but these iterators are very expensive to build. This is typically
> the case for queries that leverage DocIdSetBuilder, like TermsQuery,
> multi-term queries or the new point queries. Intersecting such queries with a
> selective query is very inefficient since these queries build a doc id set of
> matching documents for the entire index.
> Is there something we could do to improve the execution path for these
> queries?
> One idea that comes to mind is that most of these queries could also run on
> doc values, so maybe we could come up with something that would help decide
> how to run a query based on other parts of the query? (Just thinking out
> loud, other ideas are very welcome)
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