pg_net
walex
pg_net | walex | |
---|---|---|
4 | 17 | |
170 | 251 | |
5.9% | - | |
7.2 | 9.1 | |
about 2 months ago | 21 days ago | |
PLpgSQL | Elixir | |
Apache License 2.0 | MIT License |
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pg_net
- PostgreSQL Is Enough
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Supabase Wrappers: A Framework for Building Postgres Foreign Data Wrappers
> speaks a particular API over the network
it's a interesting idea, and one of the things that we were toying with in our pg_net extension (https://github.com/supabase/pg_net). This is a "generic" async network extension, so you can fetch/put/post. It works well for APIs.
I think the generic approach works for some things where the data is less "fixed" - for example, an OpenAI API endpoint.
But for "fixed" data (data warehouses), the wrapper usually needs some custom work for security, protocols, and "push down". I'll be interested to get HN's take on this - they might have some suggestions for us for this framework
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Show HN: Multiplayer Demo Built with Elixir
> finding the building blocks of modern applications (database, auth, functions, presence, realtime subscriptions), making them easy to use, and then sharing the source code.
Great observation!
> I’ve learned a ton just from cruising around supabase GitHub.
Glad to hear it!
> Can you say which of these new components will be open sourced?
All of these components are open source and licensed under Apache License v2.0.
> There are some other features (e.g. function hooks) that are also closed-source at the moment.
I actually worked on the initial implementation of function hooks. We've actually already open sourced both the client (see: https://github.com/supabase/supabase/tree/88bcef911669595428...) and the pg_net extension it requires (see: https://github.com/supabase/pg_net).
> Is Supabase heading for an “open core” model?
I don't think so. We want to continue to open source our projects under either MIT (client libs) and Apache License v2.0 (server libs).
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Supabase Edge Functions
> The dream would be to have a great DX experience around using insert/update triggers to call Supabase functions to run background tasks
We have something for this: Function Hooks (soon to be renamed "Async Triggers")[0]. They are still in alpha, but the extension [1] is getting close. It was important to build something which works with PG background workers so that it's non-blocking. We'll make quick progress on this now that we've released Edge Functions.
> sending notifications or updating related rows
Tune in for tomorrow's announcement - it's related.
[0] Function Hooks / Async Triggers: https://supabase.com/blog/2021/07/30/supabase-functions-upda...
[1] https://github.com/supabase/pg_net
walex
-
The Guide to PostgreSQL Data Change Tracking
The WAL CDC approach: https://github.com/cpursley/walex?tab=readme-ov-file#publica...
CREATE PUBLICATION news_item FOR TABLE news WHERE (topic IS "AAPL");
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Elixir Nitpicks
What do you mean testing with processes?
I won't suggest these are the best written tests, but I test various processes, supervisors, etc like this:
https://github.com/cpursley/walex/blob/master/test/walex/sup...
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PostgreSQL Is Enough
You don’t send the entire WAL, just what you subscribe to - and you can even filter via SQL: https://github.com/cpursley/walex?tab=readme-ov-file#publica...
- A Technical Dive into PostgreSQL's replication mechanisms
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Fly Postgres, Managed by Supabase
What we do is much if the business logic in Postgres. But then there’s all the other stuff like external integrations, etc.
We handled that by having an Even system built on the Postgres WAL that we use like a callback system.
I put together a little library in Elixir (that originally started out as forked Supabase realtime) for this:
https://github.com/cpursley/walex
Recently added the ability to configure WalEx to forward events to webhooks or EventRelay (so you don’t need to know Elixir).
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All the ways to capture changes in Postgres
If you're using Elixir, check out https://github.com/cpursley/walex
I've actually been thinking about turning this idea into a product where you can just point it at your postgres database and select the tables you want to listen to (with filters, like you describe). And have that forwarded to a webhook (with possibility of other protocols).
I'd love to hear folks thoughts on that (and if it would be something people would pay for).
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Show HN: ElectricSQL, Postgres to SQLite active-active sync for local-first apps
Neat, this is the pattern I've been thinking about for a while now. Also glad to see this is Elixir based.
I've been using https://github.com/cpursley/walex (basically a fork of cainophile via a fork for subabase) to listen to Postgres changes in Elixir.
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How to Listen to Database Changes Using Postgres Triggers in Elixir
https://github.com/cpursley/walex
Which is based on WAL logs and doesnt have the same limitations.
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PostgreSQL Logical Replication Gotchas
Great writeup, just added this to the WalEx readme:
https://github.com/cpursley/walex
(WalEx is an Elixir lib for listening to the WAL and perform callback-like actions with the data)
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We used Elixir's Observer to hunt down bottlenecks
Very cool.
I'm using Elixir to listen to change events via https://github.com/cpursley/walex (which I basically ripped off from Supabase).
What are some alternatives?
pgsentinel - postgresql extension providing Active session history
PolarDB-for-PostgreSQL - A cloud-native database based on PostgreSQL developed by Alibaba Cloud.
pg_hexedit - Open PostgreSQL relation files in a hex editor with tags and annotations
neon - Neon: Serverless Postgres. We separated storage and compute to offer autoscaling, branching, and bottomless storage.
Multicorn - Data Access Library
realtime - Broadcast, Presence, and Postgres Changes via WebSockets
pgsql-http - HTTP client for PostgreSQL, retrieve a web page from inside the database.
libcluster - Automatic cluster formation/healing for Elixir applications
supabase - The open source Firebase alternative.
worker - High performance Node.js/PostgreSQL job queue (also suitable for getting jobs generated by PostgreSQL triggers/functions out into a different work queue)
wal2json - JSON output plugin for changeset extraction
helm-charts - neondatabase helm charts