Mikep86 commented on code in PR #13587:
URL: https://github.com/apache/lucene/pull/13587#discussion_r1684299328
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lucene/join/src/java/org/apache/lucene/search/join/ToParentBlockJoinQuery.java:
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@@ -101,12 +99,7 @@ public Weight createWeight(
.rewrite(new ConstantScoreQuery(childQuery))
.createWeight(searcher, weightScoreMode, 0f);
} else {
- // if the score is needed we force the collection mode to COMPLETE
because the child query
- // cannot skip
- // non-competitive documents.
- childWeight =
- childQuery.createWeight(
- searcher, weightScoreMode.needsScores() ? COMPLETE :
weightScoreMode, boost);
+ childWeight = childQuery.createWeight(searcher, weightScoreMode, boost);
Review Comment:
My logic with this change was that it's simpler to pass `weightScoreMode`
directly because the child query can now skip non-competitive documents. I
thought about forcing the collection mode to `COMPLETE` when
`weightScoreMode.isExhaustive == true`, but that only happens when
`weightScoreMode` is either `COMPLETE` or `COMPLETE_NO_SCORES`.
Are there larger side-effects to always passing through `weightScoreMode`
directly? We could force the collection mode to `COMPLETE` except when
`weightScoreMode.isExhaustive == false` and `scoreMode == ScoreMode.Max`, but I
didn't do that initially because I thought that could miss edge cases. WDYT?
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