No. The proposed pg_upgrade procedure doesn't try to reproduce OIDs of catalog entries (other than toast-table OIDs, which are never preassigned anyway), so there's no issue.
Good point though --- thanks for thinking about it.
What about cached OIDs in view and function definitions, etc...?
Like if someone had a view that used the old oidrand() function and now we reused that oid for a new, completely different function, would breakage occur?
Chris
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