Re: Aggregate Push Down - Performing aggregation on foreign server

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Jeevan Chalke <jeevan(dot)chalke(at)enterprisedb(dot)com>
Cc: Ashutosh Bapat <ashutosh(dot)bapat(at)enterprisedb(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Aggregate Push Down - Performing aggregation on foreign server
Date: 2016-09-16 14:08:48
Message-ID: CA+TgmoaxZgAY4uFxxcaXBVRtmgAUcFk94CJ8fwKVom=zN=RbBw@mail.gmail.com
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On Fri, Sep 16, 2016 at 9:45 AM, Jeevan Chalke
<jeevan(dot)chalke(at)enterprisedb(dot)com> wrote:
> 6. Per my understanding, I think checking for just aggregate function is
> enough as we are interested in whole aggregate result.

+1.

> Meanwhile I will
> check whether we need to find and check shippability of transition,
> combination and finalization functions or not.

I don't think that'd be appropriate. The user is calling the
aggregate, not its constituent functions.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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