> Is there any good documentation, example, tutorial, pamphlet, discussion... to exploit pg > features to obtain "polymorphic" behavior without renouncing to referential integrity? > > Inheritance seems *just* promising. > > Any methodical a approach to the problem in pg context? I don't know if this is what you are after, but is was a VERY interesting discussion that sounds similar to what your are looking for? http://archives.postgresql.org/pgsql-sql/2006-05/msg00179.php http://archives.postgresql.org/pgsql-general/2006-05/msg01125.php basically the OP, wanted to create a template/parent schema. next he would create a new schema for each client and then create inherited tables from the parent schema. Then he would create views/fuctions that would work on the tables in the current schema. Last he would set the search_path to the schema of any client of enterest and use the default views/funtions of the newly set search_path of currently set schema. One advantage (possible the polymorphism you were looking for) with this design was that any modifications made to the template/parent schema would cascade to all of the client schemas as a feature of table inheritance. And he could also summarize all of the data from all clients by selecting from the template/parent schema. Regards, Richard Broersma Jr.
