Re: [9.3] Automatically updatable views vs writable foreign tables

On 05/16/2013 05:16 PM, Tom Lane wrote:
> Dean Rasheed <dean.a.rasheed@gmail.com> writes:
>> I've just started 9.3 beta testing and I noticed that a "simple" view
>> defined on top of a writable foreign table is not automatically
>> updatable.
>> Given that these are both new-to-9.3 features, I think it would be a
>> shame if they don't work together. It's basically a 1-line patch to
>> make such views automatically updatable, plus a small extra code block
>> in relation_is_updatable() to reflect the change in the
>> information_schema views.
> Meh.  This is assuming that an FDW that defines, say, ExecForeignDelete
> is thereby promising that *all* tables it supports are deletable.  That
> is not required by the current FDW API spec.
>
> If we want to do something about this, I'd be a bit inclined to say that
> we should add a new FDW callback function to let the FDW say whether
> a particular rel is updatable or not.
>
> I think it would be a good idea to get that done for 9.3, since all this
> support is new in 9.3, and it's not too late to adjust the API now.
> If we wait, there will be compatibility headaches.

+1



cheers

andrew