dsmiley commented on a change in pull request #529:
URL: https://github.com/apache/solr/pull/529#discussion_r803130966



##########
File path: solr/core/src/java/org/apache/solr/search/DocSetQuery.java
##########
@@ -0,0 +1,99 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.solr.search;
+
+import org.apache.lucene.index.LeafReaderContext;
+import org.apache.lucene.search.ConstantScoreScorer;
+import org.apache.lucene.search.ConstantScoreWeight;
+import org.apache.lucene.search.DocIdSetIterator;
+import org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.search.Query;
+import org.apache.lucene.search.QueryVisitor;
+import org.apache.lucene.search.ScoreMode;
+import org.apache.lucene.search.Scorer;
+import org.apache.lucene.search.Weight;
+
+import java.io.IOException;
+import java.util.Objects;
+
+/**
+ * A class that accesses Queries based on a DocSet
+ *
+ * Refer SOLR-15257
+ */
+public class DocSetQuery extends Query implements DocSetProducer{
+    private final DocSet docSet;
+
+    public DocSetQuery(DocSet docSet) {
+        super();
+        this.docSet = docSet;
+    }
+
+    @Override
+    public String toString(String field) {
+        return "DocSetQuery(" + field + ")";
+    }
+
+    @Override
+    public void visit(QueryVisitor visitor) {
+        visitor.visitLeaf(this);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return sameClassAs(obj) && equalsTo(getClass().cast(obj));
+    }
+
+    private boolean equalsTo(DocSetQuery other) {
+        return Objects.equals(docSet, other.docSet);
+    }
+
+    @Override
+    public int hashCode() {
+        return classHash() * 31 + (docSet != null ? docSet.hashCode() : 0);
+    }
+
+    /**
+     * @param searcher is not used because we already have a DocSet created in 
DocSetQuery
+     * @return the DocSet created in DocSetQuery
+     */
+    @Override
+    public DocSet createDocSet(SolrIndexSearcher searcher) throws IOException {
+        return docSet;
+    }
+
+    @Override
+    public Weight createWeight(IndexSearcher searcher, ScoreMode scoreMode, 
float boost) throws IOException {
+        //This should probably use the provided boost as scorer. However, that 
causes
+        // TestSolrQueryParser.testFilter to fail.

Review comment:
       SolrConstantScoreQuery allowed boostable (non-zero) scores; so removing 
it in this PR but keeping the 0 here on DocSetQuery (formerly Filter) is making 
the use of 0 score wider/worse.  Code paths that used SolrConstantScoreQuery 
were getting this and now if they use DocSetQuery, they have 0 score.  These 
cases are not tested as it's an obscure matter.  Any way; I'd be happy to clean 
this up in SOLR-14800 this weekend if you want to just let this be in this PR.

##########
File path: solr/core/src/java/org/apache/solr/search/FunctionRangeQuery.java
##########
@@ -73,4 +86,25 @@ protected void doSetNextReader(LeafReaderContext context) 
throws IOException {
       scorer = dv.getRangeScorer(weight, context, rangeFilt.getLowerVal(), 
rangeFilt.getUpperVal(), rangeFilt.isIncludeLower(), 
rangeFilt.isIncludeUpper());
     }
   }
+
+  @Override
+  public String toString(String field) {
+    return "FunctionRangeQuery(" + field + ")";
+  }
+
+  @Override
+  public void visit(QueryVisitor visitor) {
+    visitor.visitLeaf(this);
+  }
+
+  @Override
+  public boolean equals(Object obj) {

Review comment:
       Nice to see equals & hashCode added!




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