Excerpts from Bruce Momjian's message of jue may 06 11:19:27 -0400 2010:
> It seems copying over pg_statistic would require preservation of
> pg_class.oid. Right now we only preserve pg_class.relfilenode.
That could be fixed easily by creating a throwaway table which included the
qualified table name instead of the OID, and reloading it into pg_statistic
after the migration.
Perhaps this could be done as a regular task in the old database before
bringing the server down.
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