SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList (children 1)
      Function notNullIn (children 1)
       ExpressionList (children 2)
        Literal NULL
        Function tuple (children 1)
         ExpressionList (children 1)
          Literal NULL