Are there any open-source immutable databases yet? Or would the hegemony of SQL semantics (which seem quite tied to mutability) somehow disincentivize such an undertaking?
There's also Mozilla's mentat and its predecessor atomish which talk to SQLite on the backend.
So, sorta?
[1]: https://github.com/cruzdb/zlog [0]: https://github.com/cruzdb/cruzdb
I really wanted to use datomic for a sideproject because what I wanted to do seemed to fit really neatly with the tuple and query language of datomic, other than datascript is there a db with a similar query language and way of having linked tuples?
Bitcoin is also definitely an open-source immutable database ;)
EDIT: Maybe not, wow.
Yeah, doesn't Bitcoin use BerkeleyDB underneath or something? Superficially it's immutable (when just API'ing to the blockchain) but underneath it's backed by BerkeleyDB I believe, which is your everyday mutable sql store
Maybe for querying read values of unspent transaction balances from blockchain ledgers, but the data integrity where it matters is on the chain where people can't screw with it...