sqoop overwite data files ?

[#1]

I imported data from RDBMS to HDFS through sqoop with the following command: 

sqoop import --connect ... --table ... --hive-import --hive-table --m 20 etc.

So this command will create 20 files under a dir in hdfs.

If I decide later to import another data and overwrite the existing one I will use the following command: 

sqoop import --connect ... --table ... --hive-import --hive-overwrite --hive-table --m 10.

Will Sqoop go to the dir and remove all the previous 20 files and create 10 new ones ?

[#2]

I think it will throw you an error saying that the destination directory is not empty. At least this is how I remember it. If not, then it will erase the directory definitely.

[#3]

@Tomas79  I had the chance to test it and I noticed that Sqoop removing all the pro-existing files and creates new ones.