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Don't despair. Datalog is alive and well. Yes, it does compose beautifully. However, with composition solved, you'll discover that a naive implementation of relational algebra will suffer from spurious cross products.

https://engineering.linkedin.com/blog/2020/liquid-the-soul-o...

https://engineering.linkedin.com/blog/2020/liquid--the-soul-...

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This is pretty interesting stuff, thanks for sharing! Does temporal information get any special treatment in the economic graph at the moment? Are temporal queries of any interest?

I ask because I work on Crux [0] which at its core is a point-in-time bitemporal Datalog engine, and I see a lot of similarities (schemaless core, Worst-Case Optimal Join etc.)

[0] https://opencrux.com

Aside from what comes for free with "log-structured" there is no special treatment for temporal data.

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