Re: [HACKERS] Partitioning vs ON CONFLICT

On Mon, Apr 3, 2017 at 6:28 AM, Amit Langote
<Langote_Amit_f8@lab.ntt.co.jp> wrote:
> Since nowhere has the user asked to ensure unique(b) across partitions by
> defining the same on parent, this seems just fine.  But one question to
> ask may be whether that will *always* be the case?  That is, will we take
> ON CONFLICT DO NOTHING without the conflict target specification to mean
> checking for conflicts on the individual leaf partition level, even in the
> future when we may have global constraints?

No.  We'll take it to mean that there is no conflict with any unique
constraint we're able to declare.  Currently, that means a
partition-local unique constraint because that's all there is.  It
will include any new things added in the future.

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company