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https://issues.apache.org/jira/browse/LUCENE-2754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir updated LUCENE-2754:
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Attachment: LUCENE-2754.patch
Attached is an improved patch, still not perfect but better.
I added Uwe's suggestion of delegating all methods in the wrapper, and also
setting the rewrite method in the ctor and documenting that it does this.
I added a simple test case in search.spans that wraps some wildcard and fuzzy
queries,
and added examples and javadocs.
I also deprecated the SpanRegexQuery, converted the tests for the contrib
SpanRegexQuery to use the wrapper directly, and deprecated the old tests, but
they still work too.
I would prefer to avoid the heavy refactoring of MultiTermQuery rewrites
(easier on another issue?) just because it would make backporting to 3.x a
little more tricky.
Anyway, I think this is pretty close, maybe just needs another police
investigation
before committing.
> add spanquery support for all multitermqueries
> ----------------------------------------------
>
> Key: LUCENE-2754
> URL: https://issues.apache.org/jira/browse/LUCENE-2754
> Project: Lucene - Java
> Issue Type: New Feature
> Components: Search
> Reporter: Robert Muir
> Fix For: 4.0
>
> Attachments: LUCENE-2754.patch, LUCENE-2754.patch
>
>
> I set fix version: 4.0, but possibly we could do this for 3.x too
> Currently, we have a special SpanRegexQuery in contrib, and issues like
> LUCENE-522 open for SpanFuzzyQuery.
> The SpanRegexQuery in contrib is a little messy additionally.
> For any arbitrary MultiTermQueries to work as a SpanQuery, there are only 3
> requirements:
> # The un-rewritten query must extend SpanQuery so it can be included in Span
> clauses
> # The rewritten query should be SpanOrQuery instead of BooleanQuery
> # The rewritten term clauses should be SpanTermQueries.
> Instead of having logic like this for each query, i suggest adding two
> rewrite methods:
> * ScoringSpanBoolean rewrite
> * TopTermsSpanBoolean rewrite
> as a start i wrote these up, and added a SpanMultiTermQueryWrapper that can
> be used to wrap any multitermquery this way.
> there are a few kinks, but I think the MTQ policeman can probably help get
> through them.
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