To protect database resources from unauthorized access with operating system commands, the database system uses special operating system users and groups. Only these operating system users and members of these operating system groups can access database resources using operating system commands.
On Microsoft Windows, the database system uses the SDB Operators special operating system user group.
It is available as of SAP MaxDB version 7.7.
More information: Special Operating System User Group on Microsoft
On Unix and Linux, the database systems uses the special operating system user <sdb_user> and the special operating system groups <sdba_group> and support group.
They are available as of SAP MaxDB version 7.5.
More information: Special Operating System Users and Groups on Unix and Linux
SAP MaxDB Security Guide, Data Storage Security