| From: | Jacob Champion <jacob(dot)champion(at)enterprisedb(dot)com> |
|---|---|
| To: | assam258(at)gmail(dot)com |
| Cc: | Tatsuo Ishii <ishii(at)postgresql(dot)org>, 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: | 2026-01-05 22:07:45 |
| Message-ID: | CAOYmi+n=Rf+eNccuy=y0OzR6V91tHGh_s0JPNwo96t6+93k0fg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, Jan 4, 2026 at 7:50 AM Henson Choi <assam258(at)gmail(dot)com> wrote:
> I've been working on an NFA implementation prototype.
Neat! In case it helps, you may also be interested in my (now very out
of date) mails at [1] and [2].
At one point I was also working on an independent implementation of
the preferment rules, to make it easier for developers to intuit how
matches were made, but I can't find that email at the moment. This may
have some overlap with "state visualization" for the engine? I have a
3k-line patch based on top of v22 of the patchset as of September
2024, if there is interest in that, but no promises on quality -- I
would have posted it if I thought it was ready for review :D
Thanks,
--Jacob
[1] https://postgr.es/m/96b4d3c8-1415-04db-5629-d2617ac7a156%40timescale.com
[2] https://postgr.es/m/CAGu%3Du8gcyAQAsDLp-01R21%3DM4bpAiGP9PZz0OyiMo5_bM30PMA%40mail.gmail.com
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