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https://issues.apache.org/jira/browse/LUCENE-4803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13587330#comment-13587330
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Michael McCandless commented on LUCENE-4803:
--------------------------------------------
I committed test coverage, asserting that DDQ never alters the scores of the
original query, and it seems to be passing ...
I'll leave this open (but not work on it for now...) to explore whether we
should use FilteredQuery instead. Our Filter would not be random access (we'd
just do QueryWrapperFilter(BQ(+dd1 +dd2 +dd3 ...)) ... not sure if we'd see
perf changes with FilteredQuery.
> DrillDownQuery should rewrite to FilteredQuery?
> -----------------------------------------------
>
> Key: LUCENE-4803
> URL: https://issues.apache.org/jira/browse/LUCENE-4803
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Michael McCandless
> Fix For: 4.2, 5.0
>
>
> Today we rewrite to a query like +baseQuery +ConstantScoreQuery(boost=0.0
> TermQuery(drillDownTerm)), but I'm not certain 0.0 boost is safe / doesn't
> actually change scores.
> We should also add a test to assert that scores are not changed by drill down.
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