Solution : https://service.sap.com/sap/support/notes/686357 (SAP Service marketplace login required)
Key words : 
table pool                length------------------------------atab                      904dvpooltext              8192glsp                      800gltp                    2000kapol                      36these, se11 -> display table -> utilities -> database object -> displayfor oracle, se11 -> display table -> utilities -> database object -> check, occurred btc sapsys  f6h database error, table tst05 key- runtime error dbif_rsql_internal_error, - se16 ab0 run-time error, 03 2008b   log bz8=> result buffer, decompress pool table row, affected table pool, relevant table pool
Related Notes : 
       
| 1169995 | Unicode migration: Incorrect VARDAT length in cluster KAPOL | 
| 813445 | Documentation of the report UMG_POOL_TABLE | 
| 701226 | INST: SAP Web AS 6.40 on IBM eServer iSeries |