Solution : https://service.sap.com/sap/support/notes/410400 (SAP Service marketplace login required)
Key words : 
select statement solution implement note 538907, im information system takes, full table scan, general structure list, system makes, structure overview, individual overviews, runtime analysis, 'explain sql', index exists
Related Notes : 
       
| 538907 | CJ30, CJ40: Performance problems under DB2 | 
| 209322 | Problem in ORACLE with initial values IV | 
| 162034 | DB2/390: Database hints in Open SQL |