zacharymorn commented on a change in pull request #2205:
URL: https://github.com/apache/lucene-solr/pull/2205#discussion_r559223900
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File path:
lucene/core/src/java/org/apache/lucene/search/Boolean2ScorerSupplier.java
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@@ -231,10 +231,27 @@ private Scorer opt(
optionalScorers.add(scorer.get(leadCost));
}
- if (scoreMode == ScoreMode.TOP_SCORES) {
- return new WANDScorer(weight, optionalScorers, minShouldMatch);
- } else if (minShouldMatch > 1) {
- return new MinShouldMatchSumScorer(weight, optionalScorers,
minShouldMatch);
+ // nocommit
+ //
+ // The following updated condition follows the previous one that also
utilized
+ // MinShouldMatchSumScorer However, technically speaking, WANDScorer is
also able to
+ // handle the case where minShouldMatch == 0 (proven with existing
possible condition of
+ // scoreMode == SoreMode.TOP_SCORES && minShouldMatch == 0), but
removing the
+ // minShouldMatch > 1 condition would also stop WANDScorer to handle the
case
+ // where scoreMode.needsScore() == false, which WANDScorer is also
capable of
+ // (proven with existing possible condition of scoreMode !=
ScoreMode.TOP_SCORES &&
+ // minShouldMatch > 1).
+ //
+ // Ultimately, WANDScorer should be able to handle the following
conditions now:
+ // 1. Any ScoreMode (with scoring or not), although it might be a bit
slower compared to
+ // DisjunctionSumScorer due to data structures and algorithms usd
+ // 2. Any minCompetitiveScore ( >= 0 )
+ // 3. Any minShouldMatch ( >= 0 )
+ //
+ // So it seems we might need a different condition check to
differentiate usage between
+ // WANDScorer and DisjunctionSumScorer ?
Review comment:
Updated the comment here.
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