Daniel Janus • 4/22/2025

No, really, you can’t branch Datomic from the past (and what you can do instead)

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This technical article explores the limitations of Datomic's 'as-of' and 'speculative writes' features, specifically why they cannot be composed to create a branch from a past database state. It explains this well-known constraint and then discusses a potential solution proposed by a Reddit user involving the use of custom d/filter to implement a 'datofork' functionality.

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#database #Clojure #Datomic
No, really, you can’t branch Datomic from the past (and what you can do instead)

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