Re: [idea] more aggressive join pushdown on postgres_fdw

On Fri, Jun 5, 2015 at 5:51 AM, Shigeru HANADA <shigeru(dot)hanada(at)gmail(dot)com> wrote:
> 2015/06/05 6:43、Robert Haas <robertmhaas(at)gmail(dot)com> のメール：
>> On Sat, May 30, 2015 at 9:03 PM, Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com> wrote:
>> Neat idea. This ties into something I've thought about and mentioned
>> before: what if the innerrel is local, but there's a replicated copy
>> on the remote server? Perhaps both cases are worth thinking about at
>> some point.
>
> Interesting, but I’m not sure that I understood the situation.
>
> Here which kind of replication method do you mean? I guess you assume some kind of per-table replication such as Slony-I or materialized views with postgres_fdw or dblink, in postgres_fdw case. If this assumption is correct, we need a mapping between a local ordinary table and a foreign table which points remote replicated table.

Right. I was thinking of BDR, in particular, or some future future
in-core feature which might be similar, but Slony could do the same
thing.

--
Robert Haas
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