Just realised I didn't cc: the list on this. Was obviously having a good
evening.
Richard Huxton wrote:
Glen Parker wrote:
> I still don't think it will work. Two concurrent transactions could
still screw the data up.
Before: 9 rows.
Tx 1: See 9 rows, issue insert, see 10 rows.
Tx 2: See 9 rows, issue insert, see 10 rows.
After: 11 rows.
True, and well corrected.
Serves me right for posting at the end of a long day. Particularly
irritating as its almost identical to the example I've used myself when
showing the limitations of PG's low-locking MVCC model.
--
Richard Huxton
Archonet Ltd
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