Solution : https://service.sap.com/sap/support/notes/924753 (SAP Service marketplace login required)
Key words : 
prompt=false                     hold input locators=true                     hold statements=true                     true autocommit=true                     naming=sql, hold input locators=true, separate sap<sid>db java database, true autocommit=true, iseries jdbc faq online ibm documentation, hold statements=true, behavior override=2                     naming=sql user, hold input locators, default sap<sid>db datasource, call qsys2/qsqxrlf parm
Related Notes : 
       
| 1393104 | IBM i: JDBC driver support matrix | 
| 1385571 | PI JDBC adapter: Connecting a DB2 for IBM i | 
| 934468 | IBM i, FAQ: JDBC error analysis | 
| 907733 | Additional JDBC DataSources in SAP Java Application Server | 
| 654800 | FAQ: JDBC driver certified for SAP on IBM i |