Current content of control file is insufficient to check if database is 
compatible with postgres server. I think we should create footprint file which 
will contains all page data structures and their member offset and length (and 
maybe more).

As a first step which is useful at least for in-place-upgrade is footprint 
switch which prints page layout structures. I attach WIP patch.

I'm thinking also to create pg_footprint view with (version, structure name, 
attribute, offset, size) columns. But I'm not sure about usefulness of this 
catalog (?maybe for regression tests?).

	Comments, ideas?

		Thanks Zdenek
	


-- 
Zdenek Kotala              Sun Microsystems
Prague, Czech Republic     http://sun.com/postgresql

Responses

• Re: Proposal: PageLayout footprint at 2008-08-11 07:46:47 from Heikki Linnakangas

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