Questions tagged [gremlin]
Gremlin is the graph traversal language and virtual machine of Apache TinkerPop™
gremlin
3,616
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Gremlin Complete Hierarchy From a Specific Node
I am having difficult time to fetch the completely hierarchy by a node id.
I want the all children and sub children which are directly and in-directly connected to a particular node.
Node Properties: (...
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Finding all cycles of variable length with specific relationship properties on very large Neptune graph
We have a very large graph stored in Neptune (~26 million rels, ~20 million nodes) and need to find all the directed cycles between nodes with specific labels, following only relationships with ...
- 273
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Find unidirectional edges of a given label
There are currently some unidirectional IS_FRIENDS_WITH edges in our graph (where a IS_FRIENDS_WITH b and not vice versa). I want to write a query that will for every such uni-directional edge from a-&...
- 157
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How to make a gremlin fulltext search query when fine grained control is enabled in opensearch domain
How to query using gremlin when fine grained access control is enabled in opensearch domain?
g.withSideEffect("Neptune#fts.endpoint", "your-es-endpoint-URL")
.V()
.tail(100)...
- 11
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How to calculate average number of outgoing edges per user in a single gremlin query?
I am struggling to calculate average number of outgoing edges per user. I've tried
g.V().hasLabel('user').as('users').
outE('IS_FRIENDS_WITH').
project('usersC','edgesC').
by(__.select(...
- 157
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18
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Gremlin. How to use repeat() to find paths, and compare the relationship between adjacent array elements in until()
I have a graph like below.
g.addV('person').property('id', 'p1').property('name', 'Person 1').as('p1').
addV('person').property('id', 'p2').property('name', 'Person 2').as('p2').
addV('person')....
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27
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Neptune gremlin query times out
I have a Neptune cluster and I am using Gremlin for my queries.
I have a query where it traverses nodes and adds other nodes connected to it.
The issue is when I run this through the Notebook it runs ...
- 2,024
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25
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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('...
- 1,249
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Gremlin query to find path of vertices for the common value of vertex but different vertex
I am trying to write a query to find all path between 2 given vertices
will give an example to understand my question, here's graph like that, I'm using JanusGraph
Vertex_1(id=1, value='Bob', label='...
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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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38
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JanusGraph traversal returns Vertex instead of JanusGraphVertex
I'm using Java to connect to JanusGraph 1.0. I'm having trouble understanding why JanusGraph would ever return a Vertex.
JanusGraph graph = JanusGraphFactory.open('configfile');
JanusGraphVertex jgv = ...
- 1,249
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25
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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 ...
- 1,249
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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 ...
- 93
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2
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46
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Gremlingo stuck while evaluting g.V().hasNext()
I have a piece of code where i evaluate to drop vertices but only if a pre-fetch of
g.V().<filters>.hasNext() returns true.
Problem is on my subsequent call to fetch the nodes themselves it is ...
- 109
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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....
