[英]Gremlin - select vertices based on value found in traversal
I want to use the id of a vertex that has prop_a=x to find other vertices which have this value in some other property.我想使用具有 prop_a=x 的顶点的 id 来查找在其他属性中具有此值的其他顶点。
Something like:就像是:
g.V().sideEffect(has('prop_a','x').id().as('val')).has('prop_b',__.select('val')).count()
But the above doesn't return the right result.但是上面没有返回正确的结果。
In addition, I need it to run efficiently on AWS Neptun.此外,我需要它在 AWS Neptun 上高效运行。
Queries to create the data:创建数据的查询:
gremlin> g.addV().property(id,1).property('prop_a','x')
==>v[1]
gremlin> g.addV().property(id,2).property('prop_b',1)
==>v[2]
Query to get the desired data:查询以获取所需数据:
gremlin> g.V().
......1> has('prop_a', 'x').
......2> id().as('val').
......3> V().as('b').
......4> values('prop_b').
......5> where(eq('val')).
......6> select('b')
==>v[2]
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