GUID in Vertica

This feature is not available in Vertica yet but in place of this I would suggest or recommmend you to use Vertica's hash function - you don't need to modify any data source or table structure for this.

Kindly go through below documented link for more info on this:

http://my.vertica.com/docs/7.0.x/HTML/index.htm#Authoring/SQLReferenceManual/Functions/Mathematical/...

Regards
Rahul