EVevanelias·Feb 2, 2024
Thanks! Yeah definitely agree that building out declarative table management for Postgres would be a major effort. A few open source projects I've seen in that area include:
https://github.com/sqldef/sqldef (Go)
https://github.com/bikeshedder/tusker (Python but being ported to Rust)
https://github.com/tyrchen/renovate (Rust)
https://github.com/blainehansen/postgres_migrator (Rust)
Some of these are based on parsing SQL, and others are based on running the CREATEs in a temporary location and introspecting the result.
The schema export side can be especially tricky for Postgres, since it lacks a built-in equivalent to MySQL's SHOW CREATE TABLE. So most of these declarative pg tools shell out to pg_dump, or require the user to do so. But sqldef actually implements CREATE TABLE dumping in pure Golang if I recall correctly, which is pretty coo
Read the rest
l.
There's also the question of implementing the table diff logic from scratch, vs shelling out to another tool or using a library. For the latter path, there's a nice blog post from Supabase about how they evaluated the various options: https://supabase.com/blog/supabase-cli#choosing-the-best-dif...