Solution : https://service.sap.com/sap/support/notes/726572 (SAP Service marketplace login required)
Key words :
terms aum undo ora-1555 undo_retention 3060261 reason, 'mm/dd/yy hh24, ora parameter undo_retention, symptom queries fail, sql> select start_time, ora-01555 snapshot, rollback segment, aheadof sysdate, oracle bug, occuron oracle 9
Related Notes :
| 539921 | Current patch set for Oracle 9.2.0 |