Solution : https://service.sap.com/sap/support/notes/685602 (SAP Service marketplace login required)
Key words : 
execute full table scans, 1 content            import support package 12, 0b            import support package 18, full table scans, scan full table, 1 content support package 12, 0b support package 18, bw support packages, support package, data packages
Related Notes : 
       
| 647747 | SAPBWNews BW 3.0B Support Package 18 | 
| 601038 | SAPBWNews BW 3.1 Content Support Package 12 |