AlterQuery  t_ttl_non_deterministic (children 2)
 ExpressionList (children 1)
  AlterCommand MODIFY_TTL (children 1)
   ExpressionList (children 1)
    TTLElement (children 1)
     Function plus (children 1)
      ExpressionList (children 2)
       Function now (children 1)
        ExpressionList
       Function toIntervalMonth (children 1)
        ExpressionList (children 1)
         Literal UInt64_1
 Identifier t_ttl_non_deterministic