DatabaseSessionHandler::processWrite

public function processWrite($sessionId, $sessionData): bool
{
	$this->processDestroy($sessionId);
	$result = UserSessionTable::add([
		'SESSION_ID' => $sessionId,
		'TIMESTAMP_X' => new BitrixMainTypeDateTime(),
		'SESSION_DATA' => base64_encode($sessionData),
	]);

	return $result->isSuccess();
}