Solution : https://service.sap.com/sap/support/notes/554895 (SAP Service marketplace login required)
Key words :
terms bw schedulerselection parameterextraction result reason, typing reference typei_t_field type rsdbc_t_fie, dynamic sql selection parameters, source code correction attached, solution import support package 6, bw support packages, 'rsdbc_db_select_dynamic' function module, correct extraction results, 0b support package 06, bw scheduler