Github user jpountz commented on a diff in the pull request:
https://github.com/apache/lucene-solr/pull/345#discussion_r180496635
--- Diff:
lucene/join/src/java/org/apache/lucene/search/join/ToParentBlockJoinQuery.java
---
@@ -151,6 +152,17 @@ public Explanation explain(LeafReaderContext context,
int doc) throws IOExceptio
}
return Explanation.noMatch("Not a match");
}
+
+ @Override
+ public Matches matches(LeafReaderContext context, int doc) throws
IOException {
+ // The default implementation would delegate to the joinQuery's
Weight, which
+ // matches on children. We need to match on the parent instead
+ Scorer scorer = scorer(context);
+ if (scorer == null || scorer.iterator().advance(doc) != doc) {
+ return null;
+ }
--- End diff --
let's check the two-phase iterator here as well if applicable?
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