I've been working on that in Postgres for the past...way too long now: https://commitfest.postgresql.org/patch/6305/ https://commitfest.postgresql.org/patch/630

I've been working on that in Postgres for the past...way too long now: https://commitfest.postgresql.org/patch/6305/ https://commitfest.postgresql.org/patch/6305/ Still not totally declarative, but it at least gets IVM into core in a way people can make use of.