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From "Alan Woodward (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-6871) Move SpanQueries out of .spans package
Date Tue, 03 Nov 2015 10:25:27 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-6871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14987031#comment-14987031
] 

Alan Woodward commented on LUCENE-6871:
---------------------------------------

Right, but SpanNot and SpanOr will still be separate queries from BooleanQuery.  Moving packages
just means that some queries (like Term and Phrase) that can conceptually be both a standard
query and a span query can actually be that.

> Move SpanQueries out of .spans package
> --------------------------------------
>
>                 Key: LUCENE-6871
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6871
>             Project: Lucene - Core
>          Issue Type: Improvement
>    Affects Versions: Trunk, 5.4
>            Reporter: Alan Woodward
>         Attachments: LUCENE-6871.patch
>
>
> SpanQueries are now essentially the same as a standard query, restricted to a single
field and with an extra scorer type returned by getSpans().  There are a number of existing
queries that fit this contract, including TermQuery and PhraseQuery, and it should be possible
to make them SpanQueries as well without impacting their existing performance.  However, we
can't do this while SpanQuery and its associated Weight and Spans classes are in their own
package.
> I'd like to remove the o.a.l.search.spans package entirely, in a few stages:
> 1) Move SpanQuery, SpanWeight, Spans, SpanCollector and FilterSpans to o.a.l.search
> 2) Remove SpanTermQuery and merge its functionality into TermQuery
> 3) Move SpanNear, SpanNot, SpanOr and SpanMultiTermQueryWrapper to o.a.l.search
> 4) Move the remaining SpanQueries to the queries package
> Then we can look at, eg, making PhraseQuery a SpanQuery, removing SpanMTQWrapper and
making MultiTermQuery a SpanQuery, etc.



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