title: Predicate pushdown on non partitioned parquet data
body: <p>I have a folder in S3 which contains Parquet data:</p>
  <p>bucket_name/folder_name/YEAR/MONTH/DAY</p>
  <pre><code>eg:
  s3://bucket_name/folder_name/2020/12/10
  </code></pre>
  <p>I am using <code>Apache spark</code> on <code>AWS EMR</code> to read the parquet files.</p>
  <p>As the data is not partitioned, is there a way to implement <strong>predicate push down</strong> filter without partitioning the data?</p>
  <p>What performance improvement best practices can be used.</p>