public void send_alter_table(string dbname, string tbl_name, Table new_tbl)
 {
     oprot_.WriteMessageBegin(new TMessage("alter_table", TMessageType.Call, seqid_));
     alter_table_args args = new alter_table_args();
     args.Dbname = dbname;
     args.Tbl_name = tbl_name;
     args.New_tbl = new_tbl;
     args.Write(oprot_);
     oprot_.WriteMessageEnd();
     oprot_.Transport.Flush();
 }