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Also, is there any form of update that returns the record updated (and what if it wasn't updated for some reason)?

Update query returns a new record that may have a new version number and a new timestamp:
```val updatedAddress = db.runQuery { QueryDsl.update(a).single(newAddress) }```
However, the record does not include updates on the database side.

To get a new record from database, you have to issue a new select query.

Oh.. and with the `set { }` version, I'd suppose that even more so... (that's the one I'm using...). the `single()` version only updates what changed, or all the fields?

The `set {}` version does not return new records. The `single()` version updates all the fields.

I wonder if the dbs like postgres that support returning things in the same update could somehow be supported, while for those that don't it could be a new request...