在OrientDB中查找shorterst路径长度

Question

如何在OrientDB中找到最短路径长度？ 有很多例子可以找到最短的路径，但必须有办法只获得这条路径的长度？

而不是顶点列表like with this query

SELECT expand(path) FROM (

  SELECT shortestPath($from, $to) AS path 

  LET 

    $from = (SELECT FROM Profiles WHERE Name='Santo' and Surname='OrientDB'), 

    $to = (SELECT FROM Countries WHERE Name='United States') 

  UNWIND path

)

我只想要一个数字。

我使用Java来查询数据库，因此Java API函数也可以。

Answer 1

试试这个：

SELECT sum(path.size()) FROM (

  SELECT shortestPath($from, $to) AS path 

  LET 

    $from = (SELECT FROM Profiles WHERE Name='Santo' and Surname='OrientDB'), 

    $to = (SELECT FROM Countries WHERE Name='United States') 

  UNWIND path

)

希望它有所帮助。

此致