On 2022-07-06 14:26:00 +0200, Matthias Apitz wrote: > DB layer must LOCK the row for update. It does so using the CTID. Of > course there is a key in the row (d01gsi, the signature of the book), > but this is not uniqu and can't be used to lock exactly this row for > update.
If it isn't unique it is *not* a key. If your tables don't have a
primary key you should seriously rethink the data model.
hp
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