1 files changed, 3 insertions, 3 deletions
diff --git a/lib/gitlab/database/grant.rb b/lib/gitlab/database/grant.rb
index d32837f5793..7d334a79009 100644
--- a/lib/gitlab/database/grant.rb
+++ b/lib/gitlab/database/grant.rb
@@ -2,6 +2,8 @@ module Gitlab
   module Database
     # Model that can be used for querying permissions of a SQL user.
     class Grant < ActiveRecord::Base
+      include FromUnion
+
       self.table_name =
         if Database.postgresql?
           'information_schema.role_table_grants'
@@ -42,9 +44,7 @@ module Gitlab
               .where("GRANTEE = CONCAT('\\'', REPLACE(CURRENT_USER(), '@', '\\'@\\''), '\\'')")
           ]
 
-          union = SQL::Union.new(queries).to_sql
-
-          Grant.from("(#{union}) privs").any?
+          Grant.from_union(queries, alias_as: 'privs').any?
         end
       end
     end