Questions tagged [tinkerpop]
Apache TinkerPop™ is a graph computing framework for both graph databases (OLTP) and graph analytic systems (OLAP).
tinkerpop
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Why is addE failing with a string reference to an earlier step?
I'm trying to create a Vertex and an Edge if the vertex doesn't already exist. This is the Gremlin query I'm trying to run:
g.V(4128).as('parent').out().has('qt', 1).fold().coalesce(unfold(), addV('...
- 1,247
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Tinkerpop vertex property single cardinality is not working
When creating a vertex i explicitly mentioned Cardinality as single still its taking list, not able figure out why.
wg.addV("label")
.property(VertexProperty.Cardinality.single,"name&...
- 93
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22
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JanusGraph edges from Java do not appear in Gremlin console
I'm running a JanusGraph server and client per the instructions here. I included an argument to expose port 8182 so I can connect to it from a Java application.
My Java application just creates a new ...
- 1,247
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24
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How to get all incoming direct and indirect nodes with edges of a given node
I have a graph like below
a->b
b->c
d->c
a->c
e->d
c->e
e->a
f->g
g->a
c->h
If i select c, it should return all incoming direct and indirect nodes with edges along the ...
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Apache TinkerPop Gremlin query language is not getting converted to Neptune-specific steps that are optimized to run on the underlying Neptune engine
I am using explain() API on AWS neptune cluster as below-
GraphTraversalSource g = getTraversal(cluster);
TraversalExplanation explain = g.V().hasLabel("Users").explain();
System.out....
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16
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How is select being used outside a traversal? groovy gremlin vs nodejs gremlin
I found this QA to be very useful, or at least would be if I understood what the heck is going on, and could translate it from groovy gremlin to nodejs gremlin. What's tripping me up is the use of the ...
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70
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Neptune graph traversal that uses dynamically calculated values from last vertex to select outgoing edges for further traversal
Here is my graph:
Here is graph building code:
// backslashes included so the code can be copy and pasted into gremlin console
g\
.addV("Person").property(T.id, "A").as("a&...
- 536
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29
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Neptune Gremlin how to break cycles when collecting paths
I have the following graph:
Created using:
g.addV("Person").property(T.id, "1").as("p1")
.addV("Person").property(T.id, "2").as("p2"...
- 536
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why doesn't this graph traversal object have a .from() function? gremlin query in nodejs
I've encountered a bug, and here is the minimal replication of it in nodejs.
g.addV("foo").as("x").addV("bar").as("y").addE("relatesTo").from("x&...
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60
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efficient graph traversal to find connected components
I'm new to graphDB, I have a graph as shown in the attached image.
I want to find a connected path like "A1,E1,A2,D2,A3" for this I wrote the following query
g.V().hasLabel('A1').repeat(inE(...
- 411
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24
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Java Optional - equivalent in Gremlin
I would like to make a query that works on an element. But sometimes this element doe not already exist. So the query shoudl create it on demand. Like in Java the Optional::orElseGet - method.
My ...
- 182
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29
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The most efficient way to compare 2 aggregates (set of vertices) in Gremlin Query Language
What's the most efficient way to compare 2 aggregates (set of vertices) and see if they contain the exact same results?
Using this doesn't seem to work:
.where(select('aggregate1').is(eq('aggregate2'))...
- 68
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48
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Migrating a node label in gremlin tinkerpop
I'm working on migrating a graph from an old naming system to a new one and am looking for an efficient way to effectively re-label a given node label without losing node or edge properties or any ...
- 157
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32
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Neptune query behavior during edge creation
Gremlin query submitted to neptune to create edge , behaves differently when source/target vertices are missing.
we are using gremlin query in below format to submit edge creation on amazon neptune.
...
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123
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Running a local tinkerpop gremlin graph for testing in nodejs
I'm looking for a solution to run a gremlin tinkerpop graph locally to use for toy graphs for unit testing with Jest. I saw tinkergraph, but it doesn't appear to have a javascript implementation that ...
- 157
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36
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gremlin query to count by path-length all paths between nodes that share the same (specified) label
I have a graph with no cycles. Each vertex has a label. For those with a specific label, call it "A", I want to count
how many nodes with label "A" are not connected to any other ...
- 11
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34
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Gremlin.net throwing exception when using tree
When using the following query in Gremlin.net, I get the exception: System.Collections.Generic.KeyNotFoundException: 'The given key 'DataType{ TypeCode = 43 }' was not present in the dictionary.'
var ...
- 1,243
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78
views
I am creating client application in java using tinkerpop for gremlin but i am unable to query through my application. JanusGraph and Gremlin server
I am trying to build client application in java for gremlin. My janusgraph server is running on one more virtual machine in the same network. Through my gremlin client code i am able to establish ...
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57
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Gephi not displaying graph from gremlin console .......1. error
Ibeen tinkering with Gremlin console and was trying to visualize graph created in gremlin console through Gephi(V0.1)and gremlin 3.7.
I followed the instruction from Tinkerpop tutorials.
https://...
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35
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Why I could not do E step at the middle of a Gremlin query?
I notice that I could not have an E step at the middle of a Gremlin query. Is there a reason behind it, or just the feature is missing?
g.V().....E()...
Basically, I have an index on an edge property ...
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45
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Fetch substring of a field from the edge of a graph
I am trying fetch substring of field that is stored as an attribute in the edge of graph. To be more specific on the company-company edges
I have attached the graph creation query.
g.addV('company')....
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69
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Tinkerpop Gremlin Query: Find all edges pointing back to a vertex in the current path
I query the following path:
Company has Employees has User
From User I want to find all HasRights edges which point back to the current Company (the user also has rights on other companies).
See TODO ...
- 475
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89
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gremlin query for cycle detection works for complex graph but returns nothing for simple one
I have a gremlin query to detect cycle nature of the graph. I have tested it with multiple large complex graph it works as expected. But it does not return anything with simple 1 depth graph.
Could ...
- 331
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51
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select and arrange multiple result within single projection
Apologies for not having sample graph.
I’ve a directed acyclic graph mapping where Multiple nodes called "greatgrandparents" have edges to "grandparents" that has edges to ...
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50
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Gremlin query to check the cycle nature of the graph
I am new to gremlin. I have task where I need to check the cycle nature of the vertex in the graph and return the output in either of the format String or Boolean:
{'crn': 'COMPANY_X', 'cycle': 'Y'}
{'...
- 331
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1
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69
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Modify the gremlin Query to add a new field along with existing one
I am new to Gremlin struggling modify the query to get the appropriate result.
I have a query that gives the depth of the graph. The query is as below:
g.withSack(0)
.V('company_1')
.repeat(
...
- 331
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77
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Efficient way for filtering related nodes connected to a supernode
I am trying to filter connected nodes to a super node in Janus Graph where millions of vertices can be connected to a super node directly at level =1, suppose there is a parent node, it could have ...
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60
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Gremlin Query to fetch all objects till specified level along with sibling nodes
I have a Gremlin hierarchy of nodes which are referenced (Refer below pic). How can I retrieve all nodes, including their sibling nodes, at a specific provided level from root node ?
For instance,
...
- 1,139
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39
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Gremlin query traverse multiple nodes and edges
Knowledge sharing --> Below query traverse from A(node)<--W(edge)<--B(node)-->X(edge) --> C(node)-->Y(edge)--> D(node)<--Z(edge)<--E(node)
g.V().hasLabel("A")....
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80
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Tinkerpop Gremlin upgrade path (3.4.10 - 3.6.5)
I have to upgrade AWS Neptune Engine version to 1.2.1.0. The current Tinkerpop gremlin version (as a client) is 3.4.10.
Now, Thought I have already upgraded the Neptune server version which is still ...
