On 2016-08-16 08:19, xrg@linux.gr wrote:
> In order to avoid concurrent manipulation of rows, I do issue a "SELECT ..
> FOR UPDATE" on the sets of rows, before UPDATEing them (because UPDATEs
> cannot be ordered).
Yeah, but FOR UPDATEs are not ordered either unless you use ORDER BY,
which you didn't.
.m