title: Postgres not logging all queries, despite logging the duration
body: <p>I am trying to get my postgresql 9.3 server to log all sql that runs longer than 1 second.  I have set:</p>
  
  <pre><code>log_min_duration=1s
  log_statement='mod'
  log_duration=off
  </code></pre>
  
  <p>for most queries, the logging is working correclty, but some statements, such as "CREATE TABLE AS" or "INSERT" are not logging the statement.  The log the duration, but not the complete sql.<br></p>
  
  <p>Has anyone else seen this type of issue before, or know why postgres may not be logging the sql?  (possibly a transaction block?) Any help is greatly appreciated, thanks.</p>