SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    QualifiedAsterisk (children 1)
     Identifier X
    QualifiedAsterisk (children 1)
     Identifier Y
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier X
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      TableIdentifier Y
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Function plus (children 1)
         ExpressionList (children 2)
          Identifier X.id
          Literal UInt64_1
        Function plus (children 1)
         ExpressionList (children 2)
          Identifier Y.id
          Literal UInt64_1
   ExpressionList (children 6)
    OrderByElement (children 1)
     Identifier X.id
    OrderByElement (children 1)
     Identifier X.x_a
    OrderByElement (children 1)
     Identifier X.x_b
    OrderByElement (children 1)
     Identifier Y.id
    OrderByElement (children 1)
     Identifier Y.y_a
    OrderByElement (children 1)
     Identifier Y.y_b