Solution : https://service.sap.com/sap/support/notes/458077 (SAP Service marketplace login required)
Key words : 
rsdb/max_blocking_factor = 1rsdb/min_blocking_factor = 1rsdb/max_in_blocking_factor = 1rsdb/min_in_blocking_factor = 1               note, rsdb/max_blocking_factor = 5rsdb/min_blocking_factor = 5rsdb/max_in_blocking_factor = 5rsdb/min_in_blocking_factor = 5, optimizer_index_cost_adj = 10hash_join_enabled = true                        oracle 10optimizer_index_cost_adj = 20 2, avoid unrequired full table scans, rsdb/max_in_blocking_factor reason, production planning/detailed scheduling, change database parameter settings, rsdb/max_blocking_factor, full table scans, full table scan
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