Merge pull request #5001 from opf/fix/remove_problematic_distinct

remove problematic distinct

app/models/query/results.rb

@@ -87,8 +87,12 @@ class ::Query::Results
     includes = ([:status, :project] +
       includes_for_columns(query.involved_columns) + (options[:include] || [])).uniq
 
+    # A 'distinct' is added by the visible scope which is not necessary for
+    # filtering the work packages and which might conflict with ordering in
+    # mysql.
     WorkPackage
       .visible
+      .distinct(false)
       .where(::Query.merge_conditions(query.statement, options[:conditions]))
       .includes(includes)
       .joins((query.group_by_column ? query.group_by_column.join : nil))