Tack vare @PhilipHallstroms länk använde jag COPY FROM STDIN
så här:
rc = User.connection.raw_connection
rc.exec("COPY users (name, taxon_id, updated_at, created_at) FROM STDIN")
begin
until rc.put_copy_data( data )
$stderr.puts " waiting for connection to be writable..."
sleep 0.1
end
rescue Errno => err
@errmsg = @errmsg + "%s while reading copy data: %s" % [ err.class.name, err.message ]
error = true
else
rc.put_copy_end
while res = rc.get_result
if (res.result_status != 1)
error = true
@errmsg = @errmsg + "Result of COPY is: %s" % [ res.res_status(res.result_status) ]
end
end
end