Impala badly needs a way to generate a UTC timestamp.
Current there does not appear to be such a way.
unix_timestamp() does not actually return a timestamp, but a epoch time as an integer.
Trying to convert this to a timestamp using cast() or from_unixtime() fail because they both convert to Local time.
This could be implemented either as a timezone argument to now() or from_unixtime(), so we can ask for a timestamp in UTC.
Yes, there is a to_utc_timestamp() function, but that requires you to specify the timezone of the timestamp you are converting from.
I just want something like current_utctimestamp().