Robert Haas <robertmhaas@gmail.com> writes:
> On Mon, Aug 19, 2013 at 1:41 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> BTW, I notice that the MVCC-catalog-scans patch summarily asserts that
>> RenumberEnumType no longer poses any concurrency hazards. I doubt that's
>> true: isn't it still possible that pg_enum rows acquired through the
>> syscaches will have inconsistent enumsortorder values, if they were
>> read at different times? If you want to examine enumsortorder, you really
>> need to be comparing rows you know were read with the *same* snapshot.
> Good point, I missed that. Here's a proposed comment patch.
Looks sane to me.
regards, tom lane