> > have you considered importing to a temporary 'holding' table with > copy, then doing 'big' sql statements on it to check constraints, etc? > Yes I considered it, but the problem is the data is very tight related between different tables and is important to keep the import order of each entity into the database. With other words, the entity imprt serialization is mandatory. In fact the import script doesn't keep just insert but also delete and update for different entities. So copy is not enough. Also using 'big' sql statements cannot guarantee the import order. Sabin
