Directory users must specify their directory user names and passwords.
- If the AuthorizationSupported property for the authentication mechanism is set to no, the directory username must match a database username.
- If the AuthorizationSupported property for the authentication mechanism is set to yes, the directory username does not have to match a database username.
See Working with Directory User Management Options.
A username can contain up to 128 characters. If a directory user name exceeds this limit, the AuditTrailID (used in monitoring user access to the database) truncates the name. The AuditTrailId is logged in DBC.SessionTbl.