mkhludnev commented on code in PR #2025:
URL: https://github.com/apache/solr/pull/2025#discussion_r1385654200
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solr/core/src/java/org/apache/solr/search/join/FiltersQParser.java:
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@@ -61,6 +61,9 @@ protected BooleanQuery parseImpl() throws SyntaxError {
for (Map.Entry<QParser, Occur> clause : clauses.entrySet()) {
builder.add(unwrapQuery(clause.getKey().getQuery(), clause.getValue()),
clause.getValue());
}
+
+ builder.setMinimumNumberShouldMatch(minShouldMatch());
Review Comment:
> Could it be because FILTER clauses are considered required, and never
optional?
indeed [Like
MUST](https://lucene.apache.org/core/9_4_1/core/org/apache/lucene/search/BooleanClause.Occur.html#FILTER)
>
> Also, if one needs to use, say, three clauses in the filter query and make
sure that at least two match, - it should be possible to construct such filter
query as `{!bool filter=...}`, where the only FILTER clause is itself a boolean
query with three SHOULD clauses and mm=2.
perhaps,
1. wrap a such of bool of should via single clause filter.
2. wipe the score of that `{!bool should=... mm=2}^=0`
3. or wipe scores of underneath filters via `{!bool should=A:b^=0
should=C:d^=0 should=E:f^=0 mm=2}`
NB: I'm not sure whether parser is capable to parse those options above. If
it isn't, one can trick it with local param referencing.
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