Fix UNION syntax for MySQL

Apparently MySQL doesn't support this syntax:

    (...) UNION (...)

instead it only supports:

    ...
    UNION
    ...

1 files changed, 1 insertions, 1 deletions

diff --git a/spec/lib/gitlab/sql/union_spec.rb b/spec/lib/gitlab/sql/union_spec.rb
index 976360af9b5..9e1cd4419e0 100644
--- a/spec/lib/gitlab/sql/union_spec.rb
+++ b/spec/lib/gitlab/sql/union_spec.rb
@@ -10,7 +10,7 @@ describe Gitlab::SQL::Union do
       sql1 = rel1.reorder(nil).to_sql
       sql2 = rel2.reorder(nil).to_sql
 
-      expect(union.to_sql).to eq("(#{sql1}) UNION (#{sql2})")
+      expect(union.to_sql).to eq("#{sql1}\nUNION\n#{sql2}")
     end
   end
 end