shogodev / argilla

		return !Yii::app()->db->createCommand('SELECT COUNT(`id`) FROM `NestedSet` WHERE MOD(`lft`-`level`,2);')->queryScalar();

	}

	private function checkTree4()

	{

		$row=Yii::app()->db->createCommand('SELECT MIN(`lft`),MAX(`rgt`),COUNT(`id`) FROM `NestedSet`;')->queryRow(false);

		if($row[0]!=1 || $row[1]!=$row[2]*2)

			return false;

		return true;

	}

	private function checkArray($array)

	{

		return !Yii::app()->db->createCommand('SELECT COUNT(`id`) FROM `NestedSetWithManyRoots` WHERE MOD(`lft`-`level`,2) GROUP BY `root`;')->query()->getRowCount();

	}

	private function checkTreeWithManyRoots4()

	{

		$rows=Yii::app()->db->createCommand('SELECT MIN(`lft`),MAX(`rgt`),COUNT(`id`) FROM `NestedSetWithManyRoots` GROUP BY `root`;')->queryAll(false);

		foreach($rows as $row)

		{

			if($row[0]!=1 || $row[1]!=$row[2]*2)

				return false;

		}

		return true;

	}

	private function checkArrayWithManyRoots($array)

	{