Method reset_query

sql/sql_class.h:5833–5834

    PSI_CALL_set_thread_info(query(), query_length());
  }
  void reset_query()               /* Mutex protected */
  { set_query(CSET_STRING()); }
  void set_query_and_id(char *query_arg, uint32 query_length_arg,
                        CHARSET_INFO *cs, query_id_t new_query_id);
  void set_query_id(query_id_t new_query_id)