Connection::getVersion

public function getVersion();

/**
 * Returns error message of last failed database operation.
 *
 * @return string
 */
abstract public function getErrorMessage();

/**
 * Clears all internal caches which may be used by some dictionary functions.
 *
 * @return void
 */
public function clearCaches()
{
	$this->tableColumnsCache = array();
}