Description:
------------
(running PHP5.0.4, not .3)
PDO 0.3
PDO_PGSQL 0.2
select nextval() *always* returns NULL

Reproduce code:
---------------
<?php
    $PDO = new PDO(...);
    $PDO->setAttribute(PDO_ATTR_CASE, PDO_CASE_UPPER);
    
    $sql = "CREATE TABLE foo(id serial not null primary key)";
    $PDO->exec($sql);
    
    $sql = "INSERT INTO foo VALUES(1);";
    $PDO->exec($sql);
    
    $sql = "SELECT nextval('foo_id_seq')";
    $PDOStatement = $PDO->prepare($sql);
    $PDOStatement->execute();
    
    $PDOStatement->bindColumn("NEXTVAL", $id);
    $row = $PDOStatement->fetchAll();
    
    var_dump($id, $row, $PDO->errorInfo(), $PDOStatement->errorInfo());
    
    $sql = "DROP TABLE foo";
    $PDO->exec($sql);
?>


Expected result:
----------------
2
array(1) {
  [0]=>
  array(2) {
    ["NEXTVAL"]=>
    2
    [0]=>
    2
  }
}
array(1) {
  [0]=>
  string(5) "00000"
}
array(1) {
  [0]=>
  string(5) "00000"
}


Actual result:
--------------
NULL
array(1) {
  [0]=>
  array(2) {
    ["NEXTVAL"]=>
    NULL
    [0]=>
    NULL
  }
}
array(1) {
  [0]=>
  string(5) "00000"
}
array(1) {
  [0]=>
  string(5) "00000"
}