OrientDB 遍历 SQL 查询效率

Question

Apologies I am new to Graphing DB! I have the following basic structure in an OrientDB :

I need to obtain all the permission associated with a given User . permission are always contained in a Role but a Role can belong either directly to a User or to a Team . I haven't added it to the image but the edges between User > Role and Team > Role are has . And between User > Team are member .

My current approach is:

SELECT permission FROM (
  TRAVERSE any() FROM #23:0 WHILE $depth <=4
) WHERE @class='Role'

However, I suspect that there is a much more efficient was of achieving this.

Answer 1

Instead of using any() for traversal, you can use named edges.

Eg. if user -belongsTo-> team and user,team -hasPermission-> permission you can write this query like

SELECT FROM (
   TRAVERSE out('belongsTo', 'hasPermission') FROM #23:0 WHILE $depth <=2
) WHERE @class='Role'

This will avoid traversal of unwanted branches.