Peter Eisentraut <peter_e@gmx.net> writes:
> Alternative consideration: We could allow this in CSV format if we made
> users quote the first value if it starts with a BOM. This might be a
> reasonable way to get MS compatibility.
I don't think we can get away with a retroactive restriction on the
contents of data files.
If we're going to do this at all, I still think an explicit BOM option
for COPY, to either eat (and require) a BOM on input or emit a BOM on
output, would be the sanest way. None of the "automatic" approaches
seem safe to me.
regards, tom lane