| From: | Peter Geoghegan <pg(at)heroku(dot)com> |
|---|---|
| To: | Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com> |
| Subject: | Re: 9.5 release notes may need ON CONFLICT DO NOTHING compatibility notice for FDW authors |
| Date: | 2015-05-25 00:41:23 |
| Message-ID: | CAM3SWZT_rRKwviYwZCqEkQgX9My4Ex++31kJ1BjCjnE54EdavA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, May 24, 2015 at 5:16 PM, Peter Geoghegan <pg(at)heroku(dot)com> wrote:
> AddForeignUpdateTargets() actually won't be called with ON CONFLICT DO
> UPDATE, and so it isn't exactly true that the only obstacle to making
> FDWs support ON CONFLICT DO UPDATE is around inference of arbiter
> unique indexes on the foreign side. It's *almost* true, though.
Attached patch clears this up within the fdw-handler documentation. I
think it's worth separately noting from the existing commentary on
limitations with FDWs and ON CONFLICT.
--
Peter Geoghegan
| Attachment | Content-Type | Size |
|---|---|---|
| fdw-handler-arbiter-note.patch | text/x-patch | 616 bytes |
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