gerlowskija commented on a change in pull request #1151: SOLR-13890: Add
"top-level" DVTQ implementation
URL: https://github.com/apache/lucene-solr/pull/1151#discussion_r365341958
##########
File path: solr/core/src/java/org/apache/solr/search/TermsQParserPlugin.java
##########
@@ -88,7 +91,20 @@ Query makeFilter(String fname, BytesRef[] byteRefs) {
docValuesTermsFilter {//on 4x this is FieldCacheTermsFilter but we use the
5x name any way
@Override
Query makeFilter(String fname, BytesRef[] byteRefs) {
- return new DocValuesTermsQuery(fname, byteRefs);//constant scores
+ // TODO Further tune this heuristic number
+ return (byteRefs.length > 700) ? new
TopLevelDocValuesTermsQuery(fname, byteRefs) : new DocValuesTermsQuery(fname,
byteRefs);
+ }
+ },
+ docValuesTermsFilterTopLevel {
+ @Override
+ Query makeFilter(String fname, BytesRef[] byteRefs) {
+ return new TopLevelDocValuesTermsQuery(fname, byteRefs);
Review comment:
Sure, setting`cache=true` is trivial. It's _knowing_ that you need to be
explicit for this one query in particular that's the tricky part.
But I'm just hand-wringing; I've already made the change. It's documented
in the ref-guide, so that's as good as we're going to get.
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