Re: BUG #5857: pg_restore --clean dropping type too soon

Tom Lane wrote:
> "Stuart Bishop" <stuart(at)stuartbishop(dot)net> writes:
> > "pg_restore --clean" appears to have an ordering problem, where a custom
> > type is being dropped before some functions that use that custom type as a
> > parameter, which fails.
>
> It's always worked that way, and is difficult to avoid because of the
> circular dependencies between a type and its I/O functions. If we were
> to suppress the DROP FUNCTION commands for the I/O functions, we could
> have a non-cosmetic failure: suppose the functions have been created
> in the target DB, but not the type itself? Then the DROP TYPE CASCADE
> wouldn't remove the functions, and we'd have a conflict when the script
> tries to create them again.
>
> I don't think anyone's ever felt that it was essential for --clean to
> not produce any "no such object" errors, since in general you'd get some
> of those anyway unless the target DB exactly matches the source. Maybe
> an appropriate response is to document that this is expected.

Applied doc patch attached.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

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