Splunk DB Connect: How to save TIMESTAMP type fields in Epoch format, not in human readable format?

Hello! I used Splunk DB Connect v1 and now I updated it to Splunk DB Connect v3. I get data from oracle sql. I have several TIMESTAMP type columns that in version 1 were saved in the epoch format, but in version 3 they are stored in human readable format. Example (CREATED is TIMESTAMP type): Version 1: CREATED = 1495450599.159 Version 3: CREATED = 2017-05-22 13:56:39.159 How to make so that in version 3 TIMESTAMP type was in epoch format?