Added caching flag to database.

classes/Database/Common.php

@@ -29,7 +29,7 @@ abstract class Database_Common extends Object
 	 * @access protected
 	 * @var    string
 	 */
-	protected $driver;
+	protected $driver = null;
 
 	/**
 	 * Hostname for the server
@@ -79,6 +79,14 @@ abstract class Database_Common extends Object
 	 */
 	protected $database = null;
 
+	/**
+	 * Whether or not to use caching
+	 *
+	 * @access protected
+	 * @var    boolean
+	 */
+	protected $caching = false;
+
 	/**
 	 * Connection resource
 	 *
@@ -176,6 +184,16 @@ abstract class Database_Common extends Object
 		return $this->database = $database;
 	}
 
+	/**
+	 * Set Caching
+	 *
+	 * @param boolean whether or not to use cache
+	 */
+	public function setCaching($caching)
+	{
+		return $this->caching = $caching;
+	}
+
 	/**
 	 * Get Driver
 	 *