AlterQuery  summing (children 2)
 ExpressionList (children 2)
  AlterCommand ADD_COLUMN (children 1)
   ColumnDeclaration z (children 2)
    DataType UInt32
    Function plus (children 1)
     ExpressionList (children 2)
      Identifier x
      Literal UInt64_1
  AlterCommand MODIFY_ORDER_BY (children 1)
   Function tuple (children 1)
    ExpressionList (children 3)
     Identifier x
     Identifier y
     Function negate (children 1)
      ExpressionList (children 1)
       Identifier z
 Identifier summing
