added support for oracle connection pooling

lib/Doctrine/DBAL/Driver/OCI8/Driver.php

@@ -61,14 +61,17 @@ class Driver implements \Doctrine\DBAL\Driver
             }
 
             if (isset($params['service']) && $params['service'] == true) {
-                $dsn .= '))(CONNECT_DATA=(SERVICE_NAME=' . $params['dbname'] . ')))';
+                $dsn .= '))(CONNECT_DATA=(SERVICE_NAME=' . $params['dbname'] . '))';
             } else {
-                $dsn .= '))(CONNECT_DATA=(SID=' . $params['dbname'] . ')))';
+                $dsn .= '))(CONNECT_DATA=(SID=' . $params['dbname'] . '))';
             }
+            if (isset($params['pooled']) && $params['pooled'] == true) {
+                $dsn .= '(SERVER=POOLED)';
+            }
+            $dsn .= ')';
         } else {
             $dsn .= $params['dbname'];
         }
-
         return $dsn;
     }
 

lib/Doctrine/DBAL/Driver/OCI8/OCI8Connection.php

@@ -37,13 +37,18 @@ class OCI8Connection implements \Doctrine\DBAL\Driver\Connection
      * @param string $password
      * @param string $db
      */
-    public function __construct($username, $password, $db, $charset = null, $sessionMode = OCI_DEFAULT)
+    public function __construct($username, $password, $db, $charset = null, $sessionMode = OCI_DEFAULT, $pooled = false)
     {
         if (!defined('OCI_NO_AUTO_COMMIT')) {
             define('OCI_NO_AUTO_COMMIT', 0);
         }
 
+        if ($pooled) {
+            $this->_dbh = @oci_pconnect($username, $password, $db, $charset, $sessionMode);
+        } else {
             $this->_dbh = @oci_connect($username, $password, $db, $charset, $sessionMode);
+        }
+
         if ( ! $this->_dbh) {
             throw OCI8Exception::fromErrorInfo(oci_error());
         }