title: PGPool 'SHOW pool_nodes' returns 'ERROR: unrecognized configuration parameter "pool_nodes"' over jdbc
body: <p>I have successfully configured our application with PGpool, and I must say, it is pretty awesome. I am trying to expose information about the PGPool cluster in our app, and I'm having trouble using 'SHOW' commands over JDBC with the postgres Driver. </p>
  
  <p>Driver:</p>
  
  <pre><code>postgresql-9.3-1101-jdbc41.jar
  </code></pre>
  
  <p>When I try to execute the query "SHOW pool_nodes", I get this error:</p>
  
  <pre><code>ERROR: unrecognized configuration parameter "pool_nodes"
  </code></pre>
  
  <p>I'm pretty certain I'm connected to pgpool and not postgres, since failover is working great. My guess is that the postgres driver is doing some checks up front. Does anyone have an suggestions for getting a hold of this data in my java application?</p>