title: None-unique column index error using cur.fetch_pandas_all() to extract data from Snowflake
body: <p>I'm pulling results from Snowflake using the code below.  The SQL statement returns fine in Snowflake Web UI but when pulled in Python I get a <strong>ValueError: Found non-unique column index</strong></p>
  <p>If this happened in my Pandas workflow, I would reset_index() but, as its happening at the point of the dataframe being created I'm unsure how to fix this.</p>
  <p>As an interim, I'm exporting a csv from Snowflake and importing into Python which I hate doing as I'm refreshing multiple times a week.</p>
  <pre><code>cur.execute(sql)
  df = cur.fetch_pandas_all()
  </code></pre>