redshift convert_timezone does not work

问题

When running Redshift queries using Razor SQL, UTC dates appear to be treated as being in the local timezone, complete with daylight saving times.

For example, running

SELECT 'first',CONVERT_TIMEZONE('UTC', 'America/New_York', '2016-03-27    06:00:00')
UNION
SELECT 'second', CONVERT_TIMEZONE('UTC', 'America/New_York', '2016-03-27 07:00:00')

returns the same time for each, 2016-03-27 03:00

New York actually changed to daylight saving time on the 13th March and this does work:

SELECT 'first',CONVERT_TIMEZONE('UTC', 'America/New_York', '2016-03-13 06:00:00')
UNION
SELECT 'second', CONVERT_TIMEZONE('UTC', 'America/New_York', '2016-03-13 07:00:00')

回答1:

So this turned out to be a bug in the amazon redshift JDBCS driver. If you run the same query in the standard postgres JDBC drivers it works just fine.

I haven't had any feedback from Amazon on a possible fix.

来源：https://stackoverflow.com/questions/39149524/redshift-convert-timezone-does-not-work