Re: Commitfest 2022-03 Patch Triage Part 1b

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Greg Stark <stark(at)mit(dot)edu>
Cc: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Andy Fan <zhihui(dot)fan1213(at)gmail(dot)com>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, wenjing(dot)zwj(at)alibaba-inc(dot)com, Pavel Borisov <pashkin(dot)elfe(at)gmail(dot)com>, Fabien COELHO <coelho(at)cri(dot)ensmp(dot)fr>, Teodor Sigaev <teodor(at)sigaev(dot)ru>
Subject: Re: Commitfest 2022-03 Patch Triage Part 1b
Date: 2022-03-01 21:29:36
Message-ID: 2882358.1646170176@sss.pgh.pa.us
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Greg Stark <stark(at)mit(dot)edu> writes:
>> 2433: Erase the distinctClause if the result is unique by definition
>> ====================================================================
>> (parts of) The approach taken in this patch has been objected against in favor
>> of work that Tom has proposed. Until that work materialize this patch is
>> blocked, and thus I think we are better of closing it and re-opening it when it
>> gets unstuck. Unless Tom has plans to hack on this shortly?

> Ugh. This is a problematic dynamic. Tom has a different idea of what
> direction to take this but hasn't had a chance to work on it. So
> what's Andy Fan supposed to do here? He can't read Tom's mind and
> nobody else can really help him. Ultimately we all have limited time
> so this is a thing that will happen but is there anything we can do to
> resolve it in this case?

> We definitely shouldn't spend lots of time on this patch unless we're
> going to be ok going ahead without Tom's version of it. Is this
> something we can do using the Andy's data structure for now and change
> in the future?

> It looks like the Skip Scan patch was related to this work in some
> way? Is it blocked on it?

I did promise some time ago to get involved in the skip scan work.
I've so far failed to make good on that promise, but I will make
it a high priority to look at the area during this CF.

regards, tom lane

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