Description:
------------
I have compiled last sources from https://github.com/php/php-src/tree/master/ext/pdo_oci.

Data from NCLOB type is not returned in the row. From CLOB or NVARCHAR2 is all ok.

Test script:
---------------
$options = array(
    PDO::ATTR_STRINGIFY_FETCHES => true,
);

$dbh = new PDO('dns', 'username', 'password', $options);

$stmt = $dbh->query('select NCLOB_COLUMN from TABLE');

$row = $stmt->fetch(PDO::FETCH_ASSOC);

var_dump($row);