Solution : https://service.sap.com/sap/support/notes/1412123 (SAP Service marketplace login required)
Key words :
oracle parameter nls_length_semantics, incorrect field lengths, symptom varchar2 fields, times longer compared, field lengths, times longer, varchar2 fields, terms unicode, $nls_parameter reason, unicode systems
Related Notes :
| 1319517 | Unicode Collection Note |