SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Identifier x
    Function minus (children 1)
     ExpressionList (children 2)
      Identifier t1.y
      Identifier t2.y
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier byte_identical_r1 (alias t1)
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier byte_identical_r2 (alias t2)
     TableJoin (children 1)
      ExpressionList (children 1)
       Identifier x
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier x
