Hi Patrick,
Yes, Schema is automatcally created after import. you can try this process.
1. From SAP HANA Studio, Try loging using SYSTEM user to import . Choose File > Import... from the main menu
2. On the popup, pick SAP HANA Studio > select Catalog Object and press Next button to continue.
3.As import location, enter /usr/sap/HDB/HDB01. If you chose a different folder for upload or extraction of the file(s), enter the path to the directory that contains the index sub-directory
4.You should see the Next> button enabled and on the next screen you should see the list of available table
4. Select Import Catalog and Data and press Finish button
5.Now, you can view table contains in TEST_DB Schema in Sap HANA studio
br,
Sulabh