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From "Mike Sokolov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-1889) FastVectorHighlighter: support for additional queries
Date Sun, 04 Sep 2011 19:09:10 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-1889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mike Sokolov updated LUCENE-1889:
---------------------------------

    Attachment: LUCENE-1889.patch

This patch adds support for highlighting MultiTermQuery in FastVectorHighlighter via Query.rewrite().
 I left one FIXME (should that be nocommit?) that should be fairly easy to resolve: we currently
rewrite() the same MTQ query twice in some circumstances - if it's in a phrase I think.  I'd
be happy to sort that out if y'all decide to commit this.

> FastVectorHighlighter: support for additional queries
> -----------------------------------------------------
>
>                 Key: LUCENE-1889
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1889
>             Project: Lucene - Java
>          Issue Type: Wish
>          Components: modules/highlighter
>            Reporter: Robert Muir
>            Priority: Minor
>         Attachments: LUCENE-1889.patch, LUCENE-1889.patch
>
>
> I am using fastvectorhighlighter for some strange languages and it is working well! 
> One thing i noticed immediately is that many query types are not highlighted (multitermquery,
multiphrasequery, etc)
> Here is one thing Michael M posted in the original ticket:
> {quote}
> I think a nice [eventual] model would be if we could simply re-run the
> scorer on the single document (using InstantiatedIndex maybe, or
> simply some sort of wrapper on the term vectors which are already a
> mini-inverted-index for a single doc), but extend the scorer API to
> tell us the exact term occurrences that participated in a match (which
> I don't think is exposed today).
> {quote}
> Due to strange requirements I am using something similar to this (but specialized to
our case).
> I am doing strange things like forcing multitermqueries to rewrite into boolean queries
so they will be highlighted,
> and flattening multiphrasequeries into boolean or'ed phrasequeries.
> I do not think these things would be 'fast', but i had a few ideas that might help:
> * looking at contrib/highlighter, you can support FilteredQuery in flatten() by calling
getQuery() right?
> * maybe as a last resort, try Query.extractTerms() ?

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