Geoff Winkless schrieb am 24.01.2019 um 12:45: > The reason for that at least is that '1' and '0' are valid boolean values. > > https://www.postgresql.org/docs/9.5/datatype-boolean.html > > There's additional text describing why casts are chosen to be defined > as implicit or not here > > https://www.postgresql.org/docs/9.5/typeconv-overview.html > > My own opinion is that non-0 should implicitly cast as true and 0 > should cast as false. I strongly disagree - that would mimic MySQL's idiosyncrasies and would make such a query valid: delete from orders where 42;