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From "Mark Miller (JIRA)" <>
Subject [jira] Updated: (LUCENE-1685) Make the Highlighter use SpanScorer by default
Date Sat, 01 Aug 2009 16:28:14 GMT


Mark Miller updated LUCENE-1685:

    Attachment: LUCENE-1685.patch

Has the broad stokes - SpanScorer becomes QueryScorer, QueryScorer becomes QueryTermScorer,
and QueryScorer gets a setTokenStream rather than passing it in the constructor.

Not sure how to best preserve any history here since SpanScorer is moving to QueryScorer.

> Make the Highlighter use SpanScorer by default
> ----------------------------------------------
>                 Key: LUCENE-1685
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>            Priority: Minor
>             Fix For: 2.9
>         Attachments: LUCENE-1685.patch
> I've always thought this made sense, but frankly, it took me a year to get the SpanScorer
included with Lucene at all, so I was pretty much ready to move on after I it got in, rather
than push for it as a default.
> I think it makes sense as the default in Solr as well, and I mentioned that back when
it was put in, but alas, its an option there as well.
> The Highlighter package has no back compat req, but custom has been conservative - one
reason I havn't pushed for this change before. Might be best to actually make the switch in
3? I could go either way - as is, I know a bunch of people use it, but I'm betting its the
large minority. It has never been listed in a changes entry and its not in LIA 1, so you pretty
much have to stumble upon it, and figure out what its for.
> I'll point out again that its just as fast as the standard scorer for any clause of a
query that is not position sensitive. Position sensitive query clauses will obviously be somewhat
slower to highlight, but that is because they will be highlighted correctly rather than ignoring

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