title: PostgreSQL - copy CSV file WHERE file EXIST
body: <p>I have this request :</p>
  
  <pre><code>CREATE TEMP TABLE table1 (col1 text, col2 text);
  COPY table1 FROM '/path/to/csv/Tab.csv' DELIMITER ',' CSV;
  </code></pre>
  
  <p>I want that if the file <code>Tab.csv</code> exist it will run the request <code>COPY</code> but if it does not exist it will go to the next request without displaying the error.</p>
  
  <p>Thanks for your feedback.</p>