title: Will hive dynamic partitioning update all partitions?
body: <p>I want to use the hive dynamic partitioning to overwrite a partitioned table "page_view": </p>
  
  <pre><code>INSERT OVERWRITE TABLE page_view PARTITION(date)
     SELECT pvs.viewTime FROM page_view_stg pvs
  </code></pre>
  
  <p>My question is : If the table "page_view_stg" only has the data of "date=2017-01-01", but the dest table "page_view" has a partition "date=2017-01-02". So after running this query, will the partition "date=2017-01-02" get dropped or not? If not, how should I handle this case using dynamic partitioning?</p>
  
  <p>Thanks</p>