Hi,
In this case you will have 10 data packages which are processed in 10 calls. These data packages correspond to the data packages you will see in the PSA in BW.
Including the first call (initialization) and the last call (raising NO_MORE_DATA) the Extractor is called 12 times in total. You can easily verify it by putting a break-point in the upper part of the Function Module and run the extraction checker using t/code RSA3.
Best regards,
Sander