On 5.12.2013 15:14, Tom Lane wrote: > Ladislav Lenart <lenart...@volny.cz> writes: >> What happens if I issue UPDATE SET FROM... but with incomplete/buggy WHERE >> condition and thus SEVERAL rows from the from_list match ONE row to update? > > Any given row will be updated at most once. However, the from_list row > it gets updated against will be unpredictable, depending on the > implementation of the join. > > regards, tom lane
Makes perfect sense. Thank you, Ladislav Lenart -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
