Orientdb：遍历没有产生正确的输出

Question

Can anybody tell me how to get all nodes and edges in a traversal?

For example, if I run the following query:

select from (TRAVERSE in(), inE() FROM (SELECT FROM Example_Class WHERE @rid = #13:187))

the result changes every time.

Requirement: Get all unordered nodes and edges from a specific node (#13:187 in the example above).

Answer 1

One way to retrieve the edges and nodes encountered while traversing a graph from a particular node, say NODE, is using the query:

> traverse outE(), inV() from NODE 

Here is an example. First, let's just run out() to retrieve the encountered nodes (here the start (#11:11) and end (#11:15)); the resultant rows give the edge information:

> traverse out() from #11:11

----+------+------+-----+-------+-------
#   |@RID  |@CLASS|label|in_E3  |out_E3 
----+------+------+-----+-------+-------
0   |#11:11|Circle|4    |[#15:2]|[#15:4]
1   |#11:15|Circle|8    |[#15:4]|null   
----+------+------+-----+-------+-------

Here the picture is: (#11:11) -[#15:4]> (#11:15)

Now let's formulate the query so that the rows of the result-set include both nodes and edges:

> traverse outE(), inV() from #11:11

----+------+------+-----+-------+-------+------+------
#   |@RID  |@CLASS|label|in_E3  |out_E3 |in    |out   
----+------+------+-----+-------+-------+------+------
0   |#11:11|Circle|4    |[#15:2]|[#15:4]|null  |null  
1   |#15:4 |E3    |4>8  |null   |null   |#11:15|#11:11
2   |#11:15|Circle|8    |[#15:4]|null   |null  |null  
----+------+------+-----+-------+-------+------+------