On Fri, 2009-02-27 at 22:55 -0500, Andrew Dunstan wrote: > > Hannu Krosing wrote: > >>> > >>> > >> Some of the functions, including some specified in the standard, produce > >> fragments. That's why we have the 'IS DOCUMENT' test. > >> > > > > But then you could use xmlfragments as the functions return type, no ? > > > > > > > > Not in the case of xpath, no.
single xml document is a sub-case of xmlforest, so xmlforest should be allowed as return type, no ? > There is a very complete standard for the Xpath data model, > and we need to adhere to it. Is declaring a single all-covering "xml" data type the best or even the only way to adhere ? > cheers > > andrew > -- Hannu Krosing http://www.2ndQuadrant.com PostgreSQL Scalability and Availability Services, Consulting and Training -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
