On Thu, Feb 2, 2012 at 7:26 AM, Heikki Linnakangas wrote:

Well, you can obviously check the catalogs for that, but you must be
assuming that you don't have access to the catalogs or this would be a
non-issue.

You can also identify the kind of page by looking at the special area of the
stored page. See:
http://archives.postgresql.org/pgsql-hackers/2007-04/msg00392.php
How does that work with different forks?

I think its very ugly to mark all sorts of different pages as if they
were heap pages when they clearly aren't. I don't recall anything so
ugly being allowed anywhere else in the system. Why is it *needed*
here?

--
Simon Riggs                   http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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