Push down: Why is there no full push down done?

Following has to be met by the data flow to be able to push down completely.

• Join sources of the same data store (or with database link between them)
• Load operation must not contain triggers
• Only query transforms used, no other transforms
• No use of un-pushable functions and operators in expressions, see SAP Note 2212730:
• ...
• But at least to_date is UN-pushable when thrown against timestamp database column, see Data services: to_date inhibits push down
• No use of un-pushable transforms , see SAP Note 2212730:
• ...