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https://issues.apache.org/jira/browse/LUCENE-9640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17252538#comment-17252538
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Michael McCandless commented on LUCENE-9640:
--------------------------------------------
Disclaimer: [[email protected]] and I both work at Amazon, on customer
facing product search. I suggested [[email protected]] to open this issue,
but the idea is not very far along yet
The idea here is to provide a better / more contained solution than
{{Scorable.getChildren}} for tracking which query clause matched which hits.
I.e. when Lucene users want to know if a given query clause matched each hit,
they could wrap those clauses in {{TrackingQuery}}, but other clauses that they
don't care about can remain as normal clauses. They would also need custom
{{Collector}} to record details from their {{TrackingQuery}}.
And then we could deprecate/remove {{Scorable.getChildren}}, maybe?
So this way it would only be {{TrackingQuery}} that suffers from the
performance hit of to truly do "doc at a time scoring", rather than any
{{BooleanQuery}}.
Or maybe it's a bad idea. Or maybe there is some other way to enable users to
track which query clause(s) matched which hits ...
> Add TrackingQuery to track matching documents
> ---------------------------------------------
>
> Key: LUCENE-9640
> URL: https://issues.apache.org/jira/browse/LUCENE-9640
> Project: Lucene - Core
> Issue Type: New Feature
> Components: core/search
> Reporter: Elbek Kamoliddinov
> Priority: Major
> Labels: query
>
> Some users benefit having {{TrackingQuery}} functionality. This query would
> wrap another query and should be able to provide the matched DocIds for the
> wrapped query after search is run. For example a user running a boolean
> query {{A or B}} could wrap query {{A}} into {{TrackingQuery}} and run the
> boolean query and check if documents that matched the boolean query matches
> the query {{A}}.
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