> what the DBI policy on concurrency is.


"It's a very good thing when it works" would probably sum
it up nicely.

The mechanism, however,  is left up to the underlying
database. MySQL implements row locking (I think?). At
that point you can get standard-issue read/write lock
level concurrency.

--
Steven Lembark                               2930 W. Palmer
Workhorse Computing                       Chicago, IL 60647
                                            +1 800 762 1582

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