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> Transactional queries are usually limited to something like "get a single record, preferably from cache".

simply wrong

Well, operational dbs in practical circumstances are used for queries that take predictable time to complete.

"Get a row" "Get ten rows"

Etc, etc. All constant, all predictable, all not requiring unpredictable time to run. Also caches nicely.

What is "simply wrong" here?

Care to explain? Not getting a good vibe from you, Mr. CEO.

Getting developers to work with the infrastructure we have, and not make everyone's lives substantially harder is near impossible.