| From: | Alexander Korotkov <aekorotkov(at)gmail(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Mark Rofail <markm(dot)rofail(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>, David Steele <david(at)pgmasters(dot)net>, Stephen Frost <sfrost(at)snowman(dot)net> |
| Subject: | Re: GSoC 2017: Foreign Key Arrays |
| Date: | 2017-07-21 13:56:29 |
| Message-ID: | CAPpHfdu0O2V3X6+c4FieWPNqvfVZZ6svfR+HzAsH_ObB58+q8A@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Jul 19, 2017 at 11:08 PM, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
wrote:
> I'm not entirely sure what's the best way to deal with the polymorphic
> problem, but on the other hand as Robert says downthread maybe we
> shouldn't be solving it at this stage anyway. So let's step back a bit,
> get a patch that works for the case where the types match on both sides
> of the FK, then we review that patch; if all is well, we can discuss the
> other problem as a stretch goal.
+1
Regular FK functionality have type restrictions based on btree opfamilies
and implicit casts. Array FK should not necessary have the same type
restrictions. Also, we don't necessary need to make those restrictions as
soft as possible during this GSoC project.
------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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