The combined filter will not include any records outside the range of the security filter. This will prevent a run-time permission error from occurring when you read the records. If SETPERMISSIONFILTER is not set, a permission error can occur if you attempt to read a record that is outside the range of the user's security filter.

This C/AL function only applies to Microsoft Dynamics NAV with Microsoft SQL Server.

Security filters are an essential part of record level security. Security filters limit the access that a user has so that they can only access the records, in the tables that they have permissions for, that match the criteria specified in the security filter.

For more information about record level security, see Supporting Record-Level Security.

This function works the same as the SETPERMISSIONFILTER Function (Record).

Reference