All Aurelius and XData queries are performed directly in the database. The $filter string is converted directly into an SQL statement, there are no in-memory filters. Thus, you can only use there properties that are directly mapped in the database.
All Aurelius and XData queries are performed directly in the database. The $filter string is converted directly into an SQL statement, there are no in-memory filters. Thus, you can only use there properties that are directly mapped in the database.