title: Declare "LANGUAGE plpgsql" before or after the function body?
body: <p>Is there any difference between:</p>
  
  <pre><code>CREATE FUNCTION func() RETURNS integer
      LANGUAGE plpgsql AS $$
      declare
      begin
        -- do something
      end
  $$;
  </code></pre>
  
  <p>and </p>
  
  <pre><code>CREATE FUNCTION func() RETURNS INTEGER AS $$
      declare
      begin
        -- do something
      end
  $$ LANGUAGE plpgsql;
  </code></pre>
  
  <p>Does <code>LANGUAGE plpgsql</code> basically just have to be outside the scope of the <code>$$</code> usage?</p>