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I would love to see more databases support something like this. “Live queries” kind of thing. “Modern” app development today usually presumes some element of “
by erikpukinskis 4y ago
I would love to see more databases support something like this. “Live queries” kind of thing.
“Modern” app development today usually presumes some element of “live updates” or “multiplayer” functionality. It’s usually handled only partially, in the app layer, with a good amount of spaghetti.
But the database to me seems like the place where this should happen. I should be able to
SELECT * FROM projects
WHERE owner_id=x
ORDER BY name desc
LIMIT 20
OFFSET 60;
and then I should be able to subscribe to any changes to that query.
I should be able to have thousands of these subscriptions open at a time.
And ideally I should be able to get an efficient diff rather than a new result. Although a new result would be a great start.
I’m not sure why this isn’t seen as table stakes for databases in 2022. It seems like such a fundamental challenge of distributed application development.
- hodgesrm 4y agoClickHouse has a couple of features along this line: live views and window views. Here's a blog that compares them. https://altinity.com/blog/battle-of-the-views-clickhouse-window-view-vs-live-view https://altinity.com/blog/battle-of-the-views-clickhouse-win... Disclaimer: I work for Altinity. Polyscale is a customer.
- fasteo 4y agoRelated to this and Polyscale use case. Would this work ? CREATE WINDOW VIEW IF NOT EXISTS minute_metrics_wv minute_metrics_tt AS SELECT ... FROM raw_metrics WHERE ... GROUP BY ... That is, replacing the materialized view if favor of a WINDOW VIEW
- benjaminwootton 4y agoI did a deep dive video on some of the options around Clickhouse materialised views too: https://m.youtube.com/watch?v=i7VYsf1e2qU https://m.youtube.com/watch?v=i7VYsf1e2qU
- fasteo 4y agoCheck materialize[1] [1] https://materialize.com/ https://materialize.com/
- TOMDM 4y agoMaterialize looks like a perfect tool for the job should the need ever arise. I think my ideal would be for the functionality to be baked directly into PostgreSQL. Has anyone here used it? Any comments on speed/scalability/reliability? The self hosted license seems fairly permissive (Don't cluster, don't let your users manage the database views/queries [IANAL, read the license yourself]), but I'm hesitant given that I have never heard anyones stories about production use.
- iany 4y ago> The self hosted license seems fairly permissive (Don't cluster, don't let your users manage the database views/queries [IANAL, read the license yourself]) The self-hosted version is being discontinued after the current version. The only offering will be the purely commercial cloud offering.
- deleted 4y ago[deleted]
- contrahax 4y agoRethinkDB (RIP) was really big on this concept and we used it for a few applications back in the day. Even since then (~2016) it doesn't seem to have caught on to any other major DBs.
- powvans 4y agoElasticsearch has some functionality that does this: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-percolate-query.html https://www.elastic.co/guide/en/elasticsearch/reference/curr... More on the concept: https://en.wikipedia.org/wiki/Prospective_search https://en.wikipedia.org/wiki/Prospective_search
- iany 4y agoRisingWave is another option worth considering. Open source and cloud-native from the get-go: https://www.risingwave.dev/docs/latest/intro/ https://www.risingwave.dev/docs/latest/intro/