[GitHub] [solr] alessandrobenedetti commented on a diff in pull request #904: SOLR-16246: Introduced pre-filtering in KnnQParser

[GitBox <gi...@apache.org>]

alessandrobenedetti commented on code in PR #904:
URL: https://github.com/apache/solr/pull/904#discussion_r914902058


##########
solr/core/src/java/org/apache/solr/search/QueryUtils.java:
##########
@@ -215,4 +221,38 @@ public static Query combineQueryAndFilter(Query scoreQuery, Query filterQuery) {
       }
     }
   }
+
+  /**
+   * Parse the filter queries in Solr request
+   *
+   * @param req Solr request
+   * @param fixNegativeQueries if true, negative queries are rewritten by adding a MatchAllDocs
+   *     query clause
+   * @return and array of Query. If the request does not contain filter queries, returns an empty
+   *     list.
+   * @throws SyntaxError if an error occurs during parsing
+   */
+  public static List<Query> parseFilterQueries(SolrQueryRequest req, boolean fixNegativeQueries)
+      throws SyntaxError {
+
+    String[] filterQueriesStr = req.getParams().getParams(CommonParams.FQ);
+
+    if (filterQueriesStr != null) {
+      List<Query> filters = new ArrayList<>(filterQueriesStr.length);
+      for (String fq : filterQueriesStr) {
+        if (fq != null && fq.trim().length() != 0) {
+          QParser fqp = QParser.getParser(fq, req);
+          fqp.setIsFilter(true);

Review Comment:
   Yes, @cpoerschke , I have done some investigations and it seems that the callers that were not setting it, should have done that, so it shouldn't be parametric



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