SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function arrayJoin (alias x) (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 2)
        Function toUUID (children 1)
         ExpressionList (children 1)
          Literal \'00000000-0000-0000-0000-000000000000\'
        Function toUUID (children 1)
         ExpressionList (children 1)
          Literal \'992f6910-42b2-43cd-98bc-c812fbf9b683\'
    Function empty (alias emp) (children 1)
     ExpressionList (children 1)
      Identifier x
