Description:
------------
If you want to use an own Statement-Class which should be returned by PDO::prepare(), you have to do it this way:

$pdo->prepare($sql, array(PDO_ATTR_STATEMENT_CLASS=>array('MyStatementClass')));

see: http://cvs.php.net/co.php/php-src/ext/pdo/tests/pdo_023.phpt

You have to write that everywhere in your code and it's not possible to use 'MyStatementClass' with PDO::query().

What about implementing an attribute which could be set by PDO::setAttribute(), which makes it possible to set the Statement Class once at the beginning of the script? As side effect other methodes like PDO::query() could use that attribute and return the same class.

Any chance to see something like that in PHP 5.1?

Btw.: why is the value of PDO_ATTR_STATEMENT_CLASS of type array and not string?

Expected result:
----------------
I think that would be very useful:

class MyStatementClass extends PDOStatement {
  // my adds/changes ...
}

$pdo->setAttribute(
  array(
    PDO_ATTR_STATEMENT_CLASS => 'MyStatementClass'
  )
);


$pdo->prepare($sql); // will return a MyStatementClass object
$pdo->query($sql); // will return a MyStatementClass object too
...

Actual result:
--------------
The way it is today:

class MyStatementClass extends PDOStatement {
  // my adds/changes ...
}

$pdo->prepare($sql, array(
    PDO_ATTR_STATEMENT_CLASS=>array('MyStatementClass'))
); // will return a MyStatementClass object

$pdo->query($sql); // will not return a MyStatementClass object
$pdo->prepare($sql); // will not return a MyStatementClass object too