title: How to remove Postgres extension
body: <p>I enabled extension <strong>pg_stat_statements</strong> for PostgreSQL</p>
  
  <pre><code>create EXTENSION pg_stat_statements;
  </code></pre>
  
  <p>How can I stop using extension <strong>pg_stat_statements</strong> in PostgreSQL 9.x?</p>
  
  <p>Even <a href="http://www.postgresql.org/docs/9.3/static/pgstatstatements.html" rel="noreferrer">original documentation</a> does not contain any examples. </p>