title: Impala - Replace all data in a table's partition
body: <p>I have a program that generates all the data concerning a Impala table partition. This program writes the data in a HDFS Text file. </p>
  
  <p>How to (physically) remove all the data previously belonging to the partition and replace them with the data in the new Text file converted in Parquet format ?</p>
  
  <p>If I physically remove the old Parquet files composing the partition using raw HDFS API, is it going to disturb Impala ?</p>