Use Stellar to Transform Sensor Data Elements
You can use Stellar to customize sensor data elements to more useful information.
For example, you can transform a timestamp to be specific to your timezone:
TO_EPOCH_TIMESTAMP(timestamp, 'yyyy-MM-dd HH:mm:ss', MAP_GET(dc, dc2tz, 'UTC'))
For a message with a timestamp and dc field, transform the timestamp to an epoch timestamp given a timezone that ou can look up in a separate map, called dc2tz.
This converts the timestamp field to an epoch timestamp based on the following:
Format yyyy-MM-dd HH:mm:ss
The value in dc2tz associated with the value associated with field dc, defaulting to UTC
For a list of Stellar transformation functions supported by HCP, see https://docs.hortonworks.com/HDPDocuments/HCP1/HCP-1.6.0/administration/content/using_stellar_to_transform_sensor_data_elements.html.