The DATETIME-TO-TIMESTAMP directive converts a datetime value to timestamp with the given zone
datetime-to-timestamp <colname> 'timezone'
The DATETIME-TO-TIMESTAMP directive converts datetime values to timestamp values using the given time zone (UTC by default). Zone can be region based string like America/Los_Angeles, Europe/Paris , simple offsets like +08:00 , or prefix and offset like UTC+01:00, GMT+08:00, UT+04:00 etc
If the column is null
applying this directive is a no-op.
datetime-to-timestamp :col1 'UTC-08:00'
datetime-to-timestamp :col2 'America/Los_Angeles'