AlterQuery  summing_r1 (children 3)
 ExpressionList (children 2)
  AlterCommand ADD_COLUMN (children 2)
   ColumnDeclaration t (children 1)
    DataType UInt32
   Identifier z
  AlterCommand MODIFY_ORDER_BY (children 1)
   Function tuple (children 1)
    ExpressionList (children 3)
     Identifier x
     Identifier y
     Function multiply (children 1)
      ExpressionList (children 2)
       Identifier t
       Identifier t
 Identifier summing_r1
 Set
