add spanquery support for all multitermqueries
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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
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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