public inbox for [email protected]  

help / color / mirror / Atom feed

From: Tomas Vondra <[email protected]>
To: Alexander Cheshev <[email protected]>
To: [email protected]
Subject: Re: Multidimensional Histograms
Date: Thu, 28 Dec 2023 15:24:59 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <CAN_hQmsYDhPMK4bSJHPw3RGnpKqPbx2Uk_7HRV+Dz9F5H7dj1A@mail.gmail.com>
	<[email protected]>

On 12/27/23 22:19, Tomas Vondra wrote:
> Hello Alexander,
> 
> We actually had histograms in the early patches adding multivariate
> statistics [1]. We however ended up removing histograms and only kept
> the simpler types, for a couple reasons.
> 
> It might be worth going through the discussion - I'm sure one of the
> reasons was we needed to limit the scope of the patch, and histograms
> were much more complex and possibly less useful compared to the other
> statistics types.
>
> ...

FWIW I did not intend to reject the idea of adding multi-dimensional
histograms, but rather to provide some insight into the history of the
past attempt, and also point some weaknesses of the algorithm described
in the 1988 paper. If you choose to work on this, I can do a review etc.

regards

-- 
Tomas Vondra
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

view thread (17+ messages)  latest in thread

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected]
  Subject: Re: Multidimensional Histograms
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox