Re: Row pattern recognition

On Sun, Jan 4, 2026 at 7:50 AM Henson Choi <assam258@gmail.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 In case it helps, you may also be interested in my (now very out
of date) mails at [1] and [2].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