Method chop

sql/sql_string.h:1119–1126

  }

  inline void chop()
  {
    if (str_length)
    {
      str_length--;
      str_length= well_formed_length();
    }
  }

  void strip_sp();
  friend String *copy_if_not_alloced(String *a,String *b,uint32 arg_length);