Re: allow partial union-all and improve parallel subquery costing

From: Luc Vlaming <luc(at)swarm64(dot)com>
To: David Steele <david(at)pgmasters(dot)net>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: allow partial union-all and improve parallel subquery costing
Date: 2021-04-12 12:01:36
Message-ID: a29ac7ff-0008-f2c1-1b35-7ec578cbc854@swarm64.com
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Hi David,

On 15-03-2021 14:09, David Steele wrote:
> Hi Luc,
>
> On 12/30/20 8:54 AM, Luc Vlaming wrote:
>>>
>>> Created a commitfest entry assuming this is the right thing to do so
>>> that someone can potentially pick it up during the commitfest.
>>
>> Providing an updated patch based on latest master.
>
> Looks like you need another rebase:
> http://cfbot.cputube.org/patch_32_2787.log. Marked as Waiting for Author.
>
> You may also want to give a more detailed description of what you have
> done here and why it improves execution plans. This may help draw some
> reviewers.
>
> Regards,

Here's an improved and rebased patch. Hope the description helps some
people. I will resubmit it to the next commitfest.

Regards,
Luc

Attachment Content-Type Size
v4-0001-Add-explicit-partial-UNION-ALL-path-and-improve-p.patch text/x-patch 6.7 KB

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