Show HN: LinkedQL – Live Queries over Postgres, MySQL, MariaDB
1 points
1 hour ago
| 2 comments
| github.com
| HN
LinkedQL is a new SQL client that supports live queries over any Postgres, MySQL, and MariaDB database. You get result sets that self-update differentially as rows change in your database – via inserts, updates, deletes. Works with no extra tooling/ORM layer or GraphQL servers. You opt into live mode simply with a flag: client.query('SELECT ...', { live: true }). More at: https://linked-ql.netlify.app/capabilities/live-queries

LinkedQL is written in JavaScript and runs in both client and server environments.

GitHub + docs: https://github.com/linked-db/linked-ql

Demo examples included.

I’d love feedback: • Anything confusing? • Anything seems useful or dangerous? • Anything else that'd make you consider LinkedQL for production?

Thanks for taking a look — happy to answer any questions.

ilkhan4
2 minutes ago
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A few questions/comments after skimming the docs:

- How does authz work? Can I use Postgres RLS? If not, how would you address row or column-level permissions in a system that uses this? - If you're using logical replication to sync with PG, is there a limit to the number of clients you can have connected? I see there is a lot of work around de-duping live queries, but how well does that work in practice? - Any thought to making an extension for Postgres? My main hesitation right now is that I have to go through an NPM package to use this but a lot of our tooling expects a plain Postgres connection. - REALLY looking forward to seeing how the schema migration story looks.

Overall, it seems to address most of the use-cases where I'd reach for an ORM or API server so I'm really interested to see where this could go.

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phrasecode
1 hour ago
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Author here — a bit more detail on architecture and guarantees

Happy to dig into internals if anyone’s curious — how live updates propagate, how JOINs and complex queries resolve, consistency expectations, worst-case scaling, etc.

To keep the main post short, here are deep-dive links if you want to explore:

• Live update mechanics https://linked-ql.netlify.app/capabilities/live-queries

• Engineering paper (replication pipelines, differential projection, query inheritance) https://linked-ql.netlify.app/engineering/realtime-engine

Totally open to questions — I’m hanging around the thread to learn what concerns matter most.

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