A data processing method comprising using an application server computer, establishing a shared multi-tenant system in which tenant data that is associated with tenants is stored together in a real shared data store system; providing to a tenant computing device identifiers that identify virtual objects, wherein each of the virtual objects represents a data entity that is stored in the real shared data store system; receiving a SQL query from the tenant computing device that specifies a data operation on a first virtual object of the virtual objects; rewriting the SQL query by dynamically replacing the first virtual object with an identifier of a function; executing the function and the rewritten query without explicit metadata to generate a result set; sending the result set to the tenant computing device.