How to get the handler of a table without the help of "mysql upper layer"

[aliao]

Hi.

fine!

  When i extend the function of some storages, i got a difficult problem,  
plz
help!

    In a general way, before we do some operations on a table, we must get a
handler of the table, and the action of getting the handler is prepared by  
the
MYSQL upper(sql_table.cc .etc.) but not the substructure(e.g storage...).
    But now i want to get the handler directly without the preparation of
MYSQL upper, is there any way to get the handler by the given table name
or what should we prepare for getting the handler.

thanks!!!