On Fri, Feb 24, 2017 at 1:18 PM, David G. Johnston
<david.g.johnston@gmail.com> wrote:
> For my own sanity - the move update would complete successfully and break
> every ctid chain that it touches. Any update lined up behind it in the lock
> queue would discover their target record has been deleted and would
> experience whatever behavior their isolation level dictates for such a
> situation. So multi-partition update queries will fail to update some
> records if they happen to move between partitions even if they would
> otherwise match the query's predicate.
Right. That's the behavior for which I am advocating, on the grounds
that it's the simplest to implement and if we all agree on something
else more complicated later, we can do it then.
> Is there any difference in behavior between this and a SQL writeable CTE
> performing the same thing via delete-returning-insert?
Not to my knowledge.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
