Re: TABLESAMPLE patch is really in pretty sad shape

On Thu, Jul 16, 2015 at 10:33 PM, Alvaro Herrera
<alvherre@2ndquadrant.com> wrote:
> Petr Jelinek wrote:
>> On 2015-07-13 00:36, Tom Lane wrote:
>
>> >PS: now that I've written this rant, I wonder why we don't redesign the
>> >index AM API along the same lines.  It probably doesn't matter much at
>> >the moment, but if we ever get serious about supporting index AM
>> >extensions, I think we ought to consider doing that.
>>
>> +1
>>
>> I think this is very relevant to the proposed sequence am patch as well.
>
> Hmm, how would this work?  Would we have index AM implementation run
> some function that register their support methods somehow at startup?
> Hopefully we're not going to have the index AMs become shared libraries.
>

I recall a proposal by Alexander Korotkov about extensible access
methods although his proposal also included a CREATE AM command that
would add a pg_am row so that perhaps differs from what Tom seems to
allude to here.

http://www.postgresql.org/message-id/CAPpHfdsXwZmojm6Dx+TJnpYk27kT4o7Ri6X_4OSWcByu1Rm+VA@mail.gmail.com

Thanks,
Amit