问题
I am trying to populate a graph running in gremlin server with data from my SQL database. I would like to read the data from the database, iterate over the results and add them to the graph. This is done in a c# program so I am using Gremlin.NET bytecode.
I CAN do this by doing the c# equivalent of the example found here:
https://github.com/krlawrence/graph/blob/master/sample-code/RemoteAddBatch.java
And the c# equivalent of the answer found here:
Adding multiple vertices, changing one property-value (tinkerpop3 + python GLV)
However, I'd like to take a more functional approach. In both of these answers you have to start a traversal by adding the first vertex in your set and then you can chain off of that in something like a for loop. Is it possible to not have to add first vertex and then begin to chain other additions?
I am trying to avoid adding the first vertex and then looping because the database set might not have any results. If that is the case then I have to add an 'if' statements in order to properly handle the scenario. I'd also like to avoid having to inject a script and stick with bytecode. ie running something like
Gremlin.Net.Driver.GremlinClient.SubmitAsync<string>("g.addV('mylabel').addV('myotherlabel')")
I have also thought about adding a dummy vertex to start the traversal and then I can go into looping through adding the actual vertices I want to add. Afterwards I could then remove this dummy vertex. For reasons that I hope are obvious the dummy vertex idea feels like the wrong approach.
来源：https://stackoverflow.com/questions/57060203/how-to-add-vertices-to-gremlin-server-in-a-batch-from-gremlin-net