| From: | Michael Paquier <michael(at)paquier(dot)xyz> |
|---|---|
| To: | Henson Choi <assam258(at)gmail(dot)com> |
| Cc: | Tatsuo Ishii <ishii(at)postgresql(dot)org>, jacob(dot)champion(at)enterprisedb(dot)com, david(dot)g(dot)johnston(at)gmail(dot)com, vik(at)postgresfriends(dot)org, er(at)xs4all(dot)nl, peter(at)eisentraut(dot)org, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Row pattern recognition |
| Date: | 2026-01-19 23:40:43 |
| Message-ID: | aW7A-xiZm6HRbYMd@paquier.xyz |
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| Lists: | pgsql-hackers |
On Mon, Jan 19, 2026 at 12:32:40AM +0900, Henson Choi wrote:
> I'm writing to document the detailed design of context absorption
> optimization in Row Pattern Recognition (RPR). This is mainly for
> future reference - honestly, I'm afraid I'll forget these details
> myself in a few months, and I'd rather have them written down
> somewhere public than buried in my notes. I don't want to repeat the
> mistake of famous mathematical theorems
> where brilliant ideas were lost because "the margin was too narrow
> to contain the proof" (yes, I'm looking at you, Fermat!). I certainly
> don't want future PostgreSQL hackers to spend the next 358 years
> trying to re-implement context absorption because the design rationale
> was lost. Fortunately, the PostgreSQL community has provided us with
> sufficient digital margins. :)
Note: this message is clearly AI-generated to me, and these are
usually super sloppy. (I'd suggest to stop posting semi-generated
messages as they tend to be made of mostly unhelpful contents as they
lack judgement and context, but there's no rule against that AFAIK
around here, as well.)
--
Michael
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