> You could run a check but it would probably cost as much as the update, which does nothing when a record is not found. True if the generation of the insert d

> You could run a check but it would probably cost as much as the update, which does nothing when a record is not found. True if the generation of the insert doesn't have some heavier burdens on the caller side. Otherwise, start a txn, do the first, check if 0 updated, then do the second.