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https://issues.apache.org/jira/browse/LUCENE-4858?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand updated LUCENE-4858:
---------------------------------
Attachment: LUCENE-4858.patch
Here is a first patch:
* New convenient abstract collector class: EarlyTerminationCollector which
makes no assumption about the readers it collects (it relies on sub-classes in
order to know whether the collected context is sorted and how many docs should
be collected at most).
* New collector: SortingMergePolicyCollector that assumes that segments that
result from a merge are sorted (to do so it inspect the diagnostics of the
SegmentInfo). I named it this way to make it clear it needs to be used with
SortingMergePolicy.
* I made SegmentReader.getSegmentInfo public (instead of pkg-private) to be
able to read the diagnostics. Is it OK to do so/Is there a cleaner way to
expose diagnostics to high-level APIs?
> Early termination with SortingMergePolicy
> -----------------------------------------
>
> Key: LUCENE-4858
> URL: https://issues.apache.org/jira/browse/LUCENE-4858
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Fix For: 4.3
>
> Attachments: LUCENE-4858.patch
>
>
> Spin-off of LUCENE-4752, see
> https://issues.apache.org/jira/browse/LUCENE-4752?focusedCommentId=13606565&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13606565
> and
> https://issues.apache.org/jira/browse/LUCENE-4752?focusedCommentId=13607282&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13607282
> When an index is sorted per-segment, queries that sort according to the index
> sort order could be early terminated.
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