BW (SAP Business Warehouse)
FAQ - Running the Enterprise Data Warehousing - Data Transfer Process
If the DTP reads from a PSA/Datasource and if the PSA is regularly purged (per SAP best practice), does that affect the ability of the DTP to determine correct deltas?
No. It does not affect the ability to determines delta because DTP determines the delta based on request. Of course, before the PSA is regularly purged, ensure that all the requests are already updated into the data target.