Re: [PATCH] Space reservation v02

Heikki Linnakangas wrote:
> > For example CREATE/ALTER TABLE can cause problems.
> 
> Yeah, if the pre-upgrade script determines the amount of reserved space 
> for each table, and sets it in pg_class or reloptions or whatever, it's 
> not clear how mwhat to do with tables created after the script is run. I 
> guess we need quick scan of pg_class before the actual upgrade to check 
> that you don't have newly-created tables, and refuse the upgrade if 
> there is.

This is where a pg_class column would be useful.  You default the column
value to -1.  The pre-upgrade script sets the proper reserved space, and
new tables get a -1 and you check for those just before the upgrade. 

--  Bruce Momjian  <bruce@momjian.us>        http://momjian.us EnterpriseDB
http://enterprisedb.com
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