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https://issues.apache.org/jira/browse/LUCENE-6227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14312504#comment-14312504
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Hoss Man commented on LUCENE-6227:
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two tangential thoughts/questions...
1) From an API/conceptual standpoint, does it make more sense for this to be a
new "Occur" instance (the Occur.FILTER here) or would it make more sense for
this to be a property on BooleanClause that could be set to true with either
MUST or MUST_NOT clauses?
2) Assuming it's a new Occur.FILTER, should we plan on renaming Occur.MUST_NOT
to something like Occur.FILTER_NEGATION since (unless i'm missunderstanding
something) the "non-scoring" semantics of Occur.FILTER and Occur.MUST_NOT are
basicly the inverse of each other right? so it seems like we should probably
do something ot make it more clear that Occur.MUST_NOT has more in common with
FILTER then with MUST ?
> Add BooleanClause.Occur.FILTER
> ------------------------------
>
> Key: LUCENE-6227
> URL: https://issues.apache.org/jira/browse/LUCENE-6227
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Fix For: Trunk, 5.1
>
> Attachments: LUCENE-6227.patch, LUCENE-6227.patch, LUCENE-6227.patch
>
>
> Now that we have weight-level control of whether scoring is needed or not, we
> could add a new clause type to BooleanQuery. It would behave like MUST exept
> that it would not participate in scoring.
> Why do we need it given that we already have FilteredQuery? The idea is that
> by having a single query that performs conjunctions, we could potentially
> take better decisions. It's not ready to replace FilteredQuery yet as
> FilteredQuery has handling of random-access filters that BooleanQuery
> doesn't, but it's a first step towards that direction and eventually
> FilteredQuery would just rewrite to a BooleanQuery.
> I've been calling this new clause type FILTER so far, but feel free to
> propose a better name.
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