How to pass variable dynamically in gremlin (NeptuneDB)

[Minh_Tiến]

Hi all,
I am using aws neptunedb for my application with java backend. Now I want to pass a dynamic variable in the query to filter the product information.
My query is below:

%%gremlin

g.V().has("product","name","Tshirt").as("A").

    out("is_produced").as("B").

    out("is_located").as("C").

    select("A","B","C").

    by(valueMap("name","price").by(unfold())).

    by(valueMap("producer").by(unfold())).

    by(valueMap("country","state","street).by(unfold()))
I have 1000 goods, So i want to change Tshirt with a flexible variable 'X'  in my query. Can i do that with gremlin for my app. 
Can someone please help me? thanks in advance!

[Stephen Mallette]

Your question is a bit confusing because you mention Java but I also see " %%gremlin" syntax. Could you please clarify what you are asking?

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[HARI KISHAN]

One way to query and visualize AWS Neptune DB is by using Neptune Workbench provided by AWS Sagemaker's Jupyter notebooks.

In the Jupyter notebook, we write %%gremlin to turn the cell to Neptune magic cell. This way, the magic cell will take the gremlin query written after %%gremlin as input and query the Neptune endpoint through WebSocket, and returns the result in the notebook.

Below is the example:

%%gremlin - represents that the below input is the gremlin query that should be executed on Neptune DB through websocket.

The query g.addV('car').property('make','ford').property('model','explorer') when executed returns the ID of the vertex created in console.

Refer https://docs.aws.amazon.com/neptune/latest/userguide/notebooks-magics.html#notebooks-cell-magics-gremlin.

Finally, I think you can ignore %%gremlin 

[Stephen Mallette]

Neptune doesn't let you send parameters/bindings via scripts:

https://docs.aws.amazon.com/neptune/latest/userguide/access-graph-gremlin-differences.html

If you send a bytecode based request, which is preferred, you can declare a variable in your programming language and use it in your Gremlin as you normally would with any programming task.

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