title: Recover overwritten Bigquery table with older table schema
body: <p>I accidentally overwrote an existing table by using it as a temporary table to store result of another select. Is there a way to roll it back if both the old table and new table has a different table structure? Is it possible to prevent someone from overwriting a particular table to prevent this in future?</p>
  
  <p>There is a comment in following question which says it is not possible to recover if table schema is different. Not sure if that has changed recently.</p>
  
  <p><a href="https://stackoverflow.com/questions/41072579/is-it-possible-to-recover-overwritten-data-in-bigquery">Is it possible to recover overwritten data in BigQuery</a></p>