[sourcesmith]

> > Their section on reliable replications can be resolved by keeping a log of the changes made to the database rather than a log of the queries.

> You'd need to define a representation of that log, which ends up being equivalent to writing a NoSQL datastore.

I think this covered by relational DBs redo/rollback/write-ahead log; whatever you want to call it.

[lmm]

Right, but they generally keep it as a hidden implementation detail, and when you do get access to it it's not in any standardised way. For a lot of use cases you're better off unbundling it and newer datastores tend to be better at that.