cmd Method (DBM Class) 
cmd is a method of the DBM class (dbm module). You use this method to send a DBM command $cmd_string to the DBM server.
Syntax
$result = $session->cmd ($cmd_string);
End of the code.
More information: Database Manager CLI, Overview of All DBM Commands
Result
The result of the DBM command is returned.
If the DBM server returns an error, an exception of the class DBMServError is raised.
Example
You specify a valid DBM command.
$result = session->cmd ('db_state');
print "$result\n";
Output:
State
OFFLINE
You specify an invalid DBM command.
$result = $session->cmd ('invalid command');
print "$result\n";
Output:
Error DBM Server: -24977 ERR_COMMAND: unknown command "invalid" at /opt/sapdb/misc/SAP/DBTech/dbm.pm line 89.