Top 5 schema-change Open-Source Projects

bytebase

36 10,029 10.0 Go

The GitLab/GitHub for database DevOps. World's most advanced database DevOps and CI/CD for Developer, DBA and Platform Engineering teams.

Project mention: Ask HN: What tool(s) do you use to code review and deploy SQL scripts? | news.ycombinator.com | 2024-04-14

We have been building https://github.com/bytebase/bytebase for 3+ years. You can think it of as GitHub/GitLab for SQL changes, with integrated GitOps, code review and deployment.
You can further check out this tutorial to get a feel of our GitOps solution
https://www.bytebase.com/docs/tutorials/database-change-mana...

migra

25 2,865 0.0 Python

Like diff but for PostgreSQL schemas

Project mention: Pgroll: zero-downtime, undoable, schema migrations for Postgres | news.ycombinator.com | 2023-10-03

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

InfluxDB

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sqldef

9 1,814 9.3 Go

Idempotent schema management for MySQL, PostgreSQL, and more

Project mention: We built our customer data warehouse all on Postgres | news.ycombinator.com | 2024-02-02

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...

skeema

7 1,232 8.3 Go

Declarative pure-SQL schema management for MySQL and MariaDB

Project mention: Features I wish PostgreSQL had as a developer | news.ycombinator.com | 2024-04-05

If a tool blindly drops columns, that's just a bad tool! It doesn't mean the concept is flawed.
Thousands of companies successfully use declarative schema management. Google and Facebook are two examples at a large scale, but it's equally beneficial at smaller scales too. As long as the workflow has sufficient guardrails, it's safe and it speeds up development time.
Some companies use it to auto-generate migrations (which are then reviewed/edited), while others use a fully declarative flow (no "migrations", but automated guardrails and human review).
I'm the author of Skeema (https://github.com/skeema/skeema) which has provided declarative flow for MySQL and MariaDB since 2016. Hundreds of companies use it, including GitHub, SendGrid, Cash App, Wix, Etsy, and many others you have likely heard of. Safety is the primary consideration throughout all of Skeema's design: https://www.skeema.io/docs/features/safety/
Meanwhile a few declarative solutions that support Postgres include sqldef, Migra, Tusker (which builds on Migra), and Atlas.

pg-osc

6 477 7.9 Ruby

Easy CLI tool for making zero downtime schema changes and backfills in PostgreSQL

Project mention: Pgroll: zero-downtime, undoable, schema migrations for Postgres | news.ycombinator.com | 2023-10-03

Great to see more innovation in this space! How does this compare to?
https://github.com/shayonj/pg-osc

WorkOS

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NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).