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Questions tagged [nebula-graph]

NebulaGraph is an open source graph database solution. Use this tag for any questions that relate to using NebulaGraph as the database of your project. Any bugs or feature requests should be reported through the Nebula Graph GitHub issue tracker.

NebulaGraph is an open-source distributed graph database solution.

Use this tag for any questions relating to using NebulaGraph as your project's graph database. Any bugs or feature requests should be reported through the NebulaGraph GitHub issue tracker.

Find more about NebulaGraph Database at:

274 questions
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Jmeter JDBC Request Sampler with non-sql queries

Is it possible to query non-sql requests with Jmeter JDBC Configuration? I'm trying to load-test a nebula graphql instance using jmeter and have added the nebula jdbc driver to the jmeter in order to configure the JDBC connection. When I try to…
Usama Ijaz
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After executing a successful restore backup (. /br restore ), nebula-storaged is no longer available on NebulaGraph Database

There are some details: nebula version is 3.5.0. Deployment method is stand-alone. Installation method is RPM. CPU and memory information are 16c and 32g The operation is that the backup command is executed./br restore full --meta "127.0.0.1:9559"…
user21630752
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How to get vertex ID in Nebula Graph by providing the value of one of its attributes

I am using Nebula Graph to store a graph of multiple nodes. For example: I have TAG named Entity has one attribute name, an EDGE named call with no attributes. I inserted many vertices of type Entity and they have edge of type call between them. I…
Enas Al Kawasmi
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Stop NebulaGraph From Using Cassandra Ports

Problem Please let me know how I can improve this question in the comments below! How do I stop NebulaGraph Docker Desktop Extension from using the TCP-Port: 7001? I know how to manually stop NebulaGraph by toggling on the extension to show its…
Zach
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How could I run Spark Utils(exchange, algorithm, spark-connector) towards containerized NebulaGraph

It seems that when the NebulaGraph cluster is deployed in containers(Docker-Compose or K8s), I cannot make Spark Connector read the Graph Data properly anyway. The mitigation I made was to run Spark inside the container network: for the…
Wey Gu
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Using the MATCH statement in NebulaGraph database fails

I have NebulaGraph database version 3.1.2 running in my AWS environment and I am testing basic openCypher. If I run MATCH (n:Person{lastName:"Brown"})-[e:LIKES_COMMENT]-(m) RETURN m.locationIP, it fails to retrieve the user IP. Not sure where it…
randomv
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How to do random node scan in NebulaGraph database?

I tried to fetch 10 random and non-isolated nodes in the Nebula Graph database. According to their docs the query should be MATCH (n:tag)-[e]-() RETURN n LIMIT 10. But it fails to work. The screenshots of running the query is as follows: What is…
randomv
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The difference between a YIELD statement and a GROUP combined YIELD clause in Nebula Graph

FETCH PROP ON person "..." YIELD properties(person).name as name, properties(vertex).age as age | GROUP BY $-.name YIELD $-.name, max($-.age) as max_age FETCH PROP ON person "..." YIELD properties(person).name as name, properties(vertex).age as…
foesa Yang
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NebulaGraph Database: how to query the COMMENT of TAG and EDGE

DESCRIBE can query the detailed information of SPACE, TAG, EDGE DESCRIBE TAG can only query the COMMENT of the TAG property； DESCRIBE EDGE can only query the COMMENT of the EDGE property； And DESCRIBE SPACE can only query the COMMENT of SPACE。 So i…
Lisa Liu
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how to implement graphql with java with nebula graph like dgraph

I have a java project I have a nebula graph to save all my information I need to have graphql queries I implement it but we need a dynamic schema so we save our schema for any of dynamic entity types for example our users want to have dynamic…
saber tabatabaee yazdi
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When I compile NebulaGraph Exchange, Connectors and Algorithm, the SNAPSHOT package can not be downloaded

When I compile NebulaGraph Exchange, Connectors and Algorithm, the SNAPSHOT package can not be downloaded. It gives the hint: Could not find artifact com.vesoft:client:jar:xxx-SNAPSHOT Want to know why this hint is given. Is there any solution for…
Lisa Liu
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How to properly use MATCH inside UNWIND for a Nebula query

I’m currently working with the Nebula graph database for the first time and I’m running into some issues with a query. In terms of the schema, I have “Person” nodes, which have a “name” property, as well as Location nodes also with a name property.…
mooncloud3
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How do you detach a tag from a vertex in Nebula Graph?

I have a vertex that has properties from two tags assigned: > match (x:t1) where id(x) == '2' return x +--------------------------------------+ | x | +--------------------------------------+ | ("2" :t3{age: 20}…
Roman Puchkovskiy
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Is it possible to distinguish similarly named properties belonging to same vertex in a MATCH query in Nebula Graph?

I'm playing with Nebula Graph 2.0.0. I create two tags, both contain a property called name: create tag t1(name string) create tag t2(name string) Now I insert a vertex giving it t1.name property: > insert vertex t1(name) values '1':…
Roman Puchkovskiy
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Nebula Graph fails on CentOS 6.5

Nebula Graph fails on CentOS 6.5, the error message is as follows: # storage log Heartbeat failed, status:RPC failure in MetaClient: N6apache6thrift9transport19TTransportExceptionE: AsyncSocketException: connect failed, type = Socket not open, errno…
user12971073
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