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From Jan Høydahl (JIRA) <j...@apache.org>
Subject [jira] [Commented] (SOLR-2660) omitPositions improvements
Date Tue, 05 Mar 2013 23:02:13 GMT

    [ https://issues.apache.org/jira/browse/SOLR-2660?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13594061#comment-13594061
] 

Jan Høydahl commented on SOLR-2660:
-----------------------------------

Can we consider commit a first part of this to lay the foundation for fixing the exception,
as discussed in this thread http://search-lucene.com/m/t168517UJ5l1
                
> omitPositions improvements
> --------------------------
>
>                 Key: SOLR-2660
>                 URL: https://issues.apache.org/jira/browse/SOLR-2660
>             Project: Solr
>          Issue Type: Improvement
>    Affects Versions: 3.3, 4.0-ALPHA
>            Reporter: Robert Muir
>            Priority: Minor
>         Attachments: SOLR-2660.patch
>
>
> followup to LUCENE-2048:
> Adds factory methods getPhraseQuery/getMultiPhraseQuery to QP, this way you can subclass
it and customize behavior, particularly
> * by default, Solr throws exception here if the fieldtype omits positions: rather than
3.x's silent failure of no results, and even for trunk its nicer to fail during query parsing
rather than waiting for lucene's failure during execution.
> * adds phraseAsBoolean, which allows you to downgrade these phrase/multiphrase queries
to boolean queries: this is a nice option in conjunction with our word n-gram filters (shingle/commongrams/etc)for
a fast "approximation", if your application can tolerate some false positives, e.g. "foo bar"
-> termQuery(foo_bar), "foo bar baz" -> BQ(foo_bar AND bar_baz)

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