title: move columns from a table to its parent
body: <p>In postgresql 9.1, I've <em>tableB</em> inheriting from <em>tableA</em>.</p>
  
  <p>There are some columns in <em>tableB</em>, and no column in <em>tableA</em>.</p>
  
  <p>I want to move columns from tableB to <em>tableA</em> without dumping and reimporting rows from <em>TableB</em>… is it possible ? (I precise I have no rows at all directly in <em>tableA</em>).</p>