Hi ,
As far as i remember both the data sources are fetching the data from same tables and the fields used in both are same.
Selection of the changed FI documents based on tables BWFI_AEDAT and (timestamp table) BWOM2_TIMEST.
FI data sources are based on time stamp mechanism,as the delta is already triggered and time stamp is set due to which you might be facing issue while delta loading.
Could you let us know why you want to use both the data sources?
0FI_AR_30 -- New data source
This DataSource provides customer line items (tables BSID (open items) and BSAD (cleared items) of subledger accounting.
Available as of Release : SP3 EHP 6
Remote Cube Enabled.
0FI_AR_4 -- old data source.
DataSources extracts Accounts Receivable Accounting line items from tables BSID (open items) and BSAD (cleared items) in the R/3 source system.
Available as of Release : ECC4.0B with plug in-- 2001.1
Regards
KP