Can't yield source and dest vertex property with LOOKUP

[back-to-eat]

I want to return the certain edge's source and dest vertex as well as the edge property. But nebula keeps throw me an error. Am I using the wrong syntax? Or nebula doesn't support such function? Any idea?

[bright-starry-sky]

Nebula graph dose not support edge's source | dest vertex property when lookup edge .

[bright-starry-sky]

Could you provide a business scenario or requirement description? Let me evaluate the implementation.

[whitewum]

E.g.,

MATCH (a)-[r:transfer_to]->(b)
WHERE  r > 100
RETURN a.name, b.name

Check the transfer_to money amount larger than 100, the related people's name or age. They need to be double-checked.

[Amber1990Zhang]

Thanks for your issue. @back-to-eat
Interesting. I use Gremlin to perform what you want with this doc:

Find an edge labeled battled and the time is 2

# only return edge
gremlin> g.E().has('battled', 'time', 2)
==>e[23][6-battled->10]

# return the source and dest vertices properties
gremlin> g.E().has('battled', 'time', 2).bothV().valueMap()
==>[name:[hercules],type:[demigod],age:[30]]
==>[name:[hydra],type:[monster],age:[0]]

Or you can traverse from vertex, the following query have the same result:

# only return edge
gremlin> g.V().outE('battled').has('time', 2)
==>e[23][6-battled->10]

# return the source and dest vertices properties
gremlin> g.V().outE('battled').has('time', 2).bothV().valueMap()
==>[name:[hercules],type:[demigod],age:[30]]
==>[name:[hydra],type:[monster],age:[0]]

I don't know about business scenarios but maybe my example is what @back-to-eat want. Hope this can help you. @bright-starry-sky

[jude-zhu]

relates to vesoft-inc/nebula-graph#632

[CPWstatic]

We had support it by Match. And we also plan to improve it in Lookup, please track it with #2594