Re: Memory-Bounded Hash Aggregation

From: Adam Lee <ali(at)pivotal(dot)io>
To: Jeff Davis <pgsql(at)j-davis(dot)com>
Cc: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Taylor Vesely <tvesely(at)pivotal(dot)io>, Melanie Plageman <mplageman(at)pivotal(dot)io>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Memory-Bounded Hash Aggregation
Date: 2019-12-05 03:50:13
Message-ID: 20191205035013.GB1345@mars.local
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On Wed, Dec 04, 2019 at 06:55:43PM -0800, Jeff Davis wrote:
>
> Thanks very much for a great review! I've attached a new patch.

Hi,

About the `TODO: project needed attributes only` in your patch, when
would the input tuple contain columns not needed? It seems like anything
you can project has to be in the group or aggregates.

--
Melanie Plageman & Adam

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