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https://issues.apache.org/jira/browse/LUCENE-1425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12642659#action_12642659
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Mark Miller commented on LUCENE-1425:
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Its a balancing act I suppose. Mark Harwood has suggested something similar in
the past. Its ideally where we would like to end up I would think, but at the
same time, it requires a lot more effort to implement the match logic in each
query. I'll be happy to give it a shot as I can, but it would be nice to have
some sort of support on a shorter time frame, even if inefficient. I think
there are a lot of setups out there where you wont have enough matches in a
document to consume _that_ much memory. To play nice, we ship with
constantscore scoring off with the option to enable. Technically, its not
really going to be any less efficient than the current support for non
constantscore wildcard,prefix,range (other than the instantiated index).
We can certainly hold off for a while to see where a match solution might go,
but if it doesn't get much momentum, I'd like to offer this option. Its a
similar rationality to the Span Highlighter itself. It could have been done
more efficiently if it broke the old API, and it could have been done right if
we built in support to core Lucene, but the way it was done - its there and
available and other ways are not.
I'll let this stew and play around with the token matcher idea for a bit
if/when/as time arises. SpanQueries, FilterQueries, ConstantScoreQueries, oh my.
> Add ConstantScore highlighting support to SpanScorer
> ----------------------------------------------------
>
> Key: LUCENE-1425
> URL: https://issues.apache.org/jira/browse/LUCENE-1425
> Project: Lucene - Java
> Issue Type: New Feature
> Components: contrib/highlighter
> Reporter: Mark Miller
> Assignee: Mark Miller
> Priority: Minor
> Attachments: LUCENE-1425.patch
>
>
> Its actually easy enough to support the family of constantscore queries with
> the new SpanScorer. This will also remove the requirement that you rewrite
> queries against the main index before highlighting (in fact, if you do, the
> constantscore queries will not highlight).
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