More pg_upgrade clarifications

Bruce Momjian <bruce@momjian.us>

From: Bruce Momjian <bruce@momjian.us>

To: PostgreSQL-development <pgsql-hackers@postgreSQL.org>

Date: 2011-01-08T02:27:58Z

Lists: pgsql-hackers

Attachments

(unnamed) (text/plain)
/pgpatches/relfilenode (text/x-diff) patch

The attached two patches clarify pg_upgrades behavior.  Specifically,
the first patch updates the C comments regarding pg_upgrade_support.

The second patch clarifies that pg_class.oid really needs preserving,
not pg_class.relfilenode.  We used to use create relfilenode files to
preserve pg_class.oids, but no longer in PG >= 9.0.  Also add comments
about what is being preserved, and why.  This should help future
improvements.

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

  + It's impossible for everything to be true. +