How selective deletion works on partition for data targets?

Hi BI Guru,

There is new function in NW2004S for the selective deletion on the data targets. It is 'work on partition'on the selective deletion screen. I did the testing on the function, It seems it does not delete the partition, but delete the data from the partition. Does it make sense for your guys? I would expect that drop complete partitions which matches a subset of the records. Could you please tell me how it works? Thanks in advance.

Regards,

Liu Jia