On Thu, 18 Jan 2024, 16:06 Peter Eisentraut, <pe...@eisentraut.org> wrote: > > On 01.12.23 06:00, Michael Paquier wrote: > > Please find attached a patch set that aims at implementing sequence > > access methods, with callbacks following a model close to table and > > index AMs, with a few cases in mind: > > - Global sequences (including range-allocation, local caching). > > - Local custom computations (a-la-snowflake). > > That's a lot of code, but the use cases are summarized in two lines?!? > > I would like to see a lot more elaboration what these uses cases are (I > recognize the words, but do we have the same interpretation of them?) > and how they would be addressed by what you are proposing, and better > yet an actual implementation of something useful, rather than just a > dummy test module.
At $prevjob we had a use case for PRNG to generate small, non-sequential "random" numbers without the birthday problem occurring in sqrt(option space) because that'd increase the printed length of the numbers beyond a set limit. The sequence API proposed here would've been a great alternative to the solution we found, as it would allow a sequence to be backed by an Linear Congruential Generator directly, rather than the implementation of our own transactional random_sequence table. Kind regards, Matthias van de Meent Neon (https://neon.tech)
