title: remove source file from Hive table
body: <p>When I load a (csv)-file to a hive table I can load without overwriting, thus adding the new file to the table.
  Internally the file is just copied to the correct folder in HDFS 
  (e.g. user/warehouse/dbname/tablName/datafile1.csv). And probably some metadata is updated.</p>
  
  <p>After a few loads I want to remove the contents of a specific file from the table.</p>
  
  <p>I am sure I cannot simply delete the file because of the metadata that needs to be adjusted as well. There must be some kind of build-in function for this.</p>
  
  <p>How do I do that?</p>