On Fri, 2003-06-27 at 08:36, Peter Eisentraut wrote:
> The system catalog columns pg_attrdef.adsrc and pg_constraint.consrc store
> "human-readable" versions of pg_attrdef.adbin and pg_constraint.conbin.
> During a rename operation, they are not and cannot be updated. We need to
> remove them and make interested applications get the information about of
> the *bin columns. I noticed that various functions were recently updated
> to do that, but I think the columns should be removed altogether because
> they cannot be trusted.
Agreed (even brought it up at the time), but there are some
circumstances that may cause the binary column to be irretrievable due
to a corrupt system catalogue -- which is still possible despite
dependencies (concurrency issues -- lack of object locking).
--
Rod Taylor <rbt@rbt.ca>
PGP Key: http://www.rbt.ca/rbtpub.asc
