I found some documents from SAP related to the ODBC connection to HANA, and technically speaking, it´s possible. I'm not sure if the software agreement allows or not this practice for the ERP tables.
In the SAP documentation I also found information about Cluster and Pool table on R/3 and the conversion of such kind of table to SAP S/4. After conversion all table are Transparent. So you can freely query the data from all tables available in the system using an ODBC connection.
I found some posts related to Qlikview and Hana. . Maybe it could help you:
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Qlik support connecting to HANA Views on S/4 HANA with the Qlik ODBC connector, this assumes that the SAP ODBC Driver has been installed on the Qlik system. We also support Netweaver 7.5 with the Qlik SAP Connectors, SAP S/4 HANA is using Netweaver 7.5 so it is possible to use e.g. the SQL Connector with SAP S/4 HANA.
Provided that you already have installed the ODBC connector provided by SAP, Qlik ODBC connector gives you an option to HANA views on S/4 HANA.
From SAP Connectors 6.3, we support Netweaver 7.5. From Qlik Sense 3.0 we are certified for SAP HANA using ODBC