.. efun:: int db_close(int handle)
  :optional:

  Close the server-connection with the handle :arg:`handle` Return the handle-number on success.

  The function is available only if the driver is compiled with mySQL support. In that case, :macro:`__MYSQL__` is defined.

  The efun triggers a privilege violation ("mysql", "db_close").

  :history 3.2.9 introduced:
  :history 3.2.11 changed: adds the privilege violation.

  .. seealso:: :efun:`db_affected_rows`, :efun:`db_conv_string`, :efun:`db_coldefs`, :efun:`db_connect`, :efun:`db_exec`, :efun:`db_error`, :efun:`db_fetch`, :efun:`db_handles`, :efun:`db_insert_id`, :concept:`mysql`, :master:`privilege_violation`