DSBulk currently doesn't allow literals in mappings outside of function args. We could extend support for literals to allow things like: ``` fieldA=col1,fieldB=col2,'dsbulk'=created_by ``` ┆Issue is synchronized with this [Jira Task](https://datastax-oss.atlassian.net/browse/BULK-30) by [Unito](https://www.unito.io)