Logger VS postgres_migrator

Deployment: Upgrade SQL scripts. You already have to do this on any relational DB if you need to alter existing tables. We just also deploy new/updated packages. We trigger them via pipelines.

Also keep in mind that the logic you deploy in the database is generally not as complex as other software as you mostly just query, modify and write highly structured data.

But we still run plenty of tests. There is a great unit testing tool for Oracle: utPLSQL [1]. We also spin up databases and run the installation and upgrade scripts on pull-requests.

[0] https://github.com/OraOpenSource/Logger

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 cool.

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...

Forr postgres, how does the schema diffing aspect compare to migra?

https://github.com/djrobstep/migra

I'm asking because, although migra is excellent and there are multiple migrations tools based on it (at least https://github.com/bikeshedder/tusker and https://github.com/blainehansen/postgres_migrator), issues are piling up but development seem to be slowing down

Is this similar to migra? There's a tool written in Rust that calls it, postgres_migrator (there's also tusker)

The best solution I've ever seen is this Rust library https://github.com/cornucopia-rs/cornucopia

You write plain SQL for you schema (just a schema.sql is enough) and plain SQL functions for your queries. Then it generates Rust types and Rust functions from from that. If you don't use Rust, maybe there's a library like that for your favorite language.

Optionally, pair it with https://github.com/bikeshedder/tusker or https://github.com/blainehansen/postgres_migrator (both are based off https://github.com/djrobstep/migra) to generate migrations by diffing your schema.sql files, and https://github.com/rust-db/refinery to perform those migrations.

Now, if you have simple crud needs, you should probably use https://postgrest.org/en/stable/ and not an ORM. There are packages like https://www.npmjs.com/package/@supabase/postgrest-js (for JS / typescript) and probably for other languages too.

If you insist on an ORM, the best of the bunch is prisma https://www.prisma.io/ - outside of the typescript/javascript ecosystem it has ports for some other languages (with varying degrees of completion), the one I know about is the Rust one https://prisma.brendonovich.dev/introduction