write point statistics inaccuracy

[liuruiyiyang]

The statistics of write point is inaccurate when:

1. insert data of which the timestamp already exists
2. update data
3. delete data

Expected behavior:
For 1 and 2, the write point number statistics should not change while for 3 the statistics should be less accordingly.

[liukun4515]

It's difficult for us to collect accurate statistics.
If the update and delete is the operation like that( update some points selected from the dataset or delete some points selected from the dataset).
But now we just apply some operation command, which can't get points rewritten.

[liukun4515]

The statistics of write point is inaccurate when:

1. insert data of which the timestamp already exists
2. update data
3. delete data

Expected behavior:
For 1 and 2, the write point number statistics should not change while for 3 the statistics should be less accordingly.

The operation of 1 is update actually.