title: How to add data file to PostgreSQL database tablespace?
body: <p>I am using PostgreSQL and I want to add a new data files to existing tablespace  ( like in <a href="http://docs.oracle.com/cd/B28359_01/server.111/b28310/dfiles002.htm#ADMIN11422" rel="nofollow">oracle</a> )</p>
  
  <p>I could not found any description on this on PostgreSQL documentation. 
  How to do this ?</p>