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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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Does nebula-docker support uploading CSV data to the corresponding graph database?

Does nebula-studio support uploading CSV files and other data files, and uploading them to the corresponding tables in the database? Can this be achieved using Python code? If it is supported, how to optimize the upload process for large amounts of…
idelle
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define index and rebuild it by code in spring boot like migrations in laravel

we can define the index in Nebula graph by nebula graph studio manually how can I do this with a standard migration seeder as we have in other standard frameworks like Laravel? I have a spring boot and I want to know more about solutions to define…
saber tabatabaee yazdi
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Write blocking will occur after performing compaction operation for a period of time

The nebula data is about 40g. It takes about an hour to manually execute the compaction. When the compaction is executed for about 30 minutes, it is found that the data cannot be written in. After the compaction is over, the data can be written in…
idelle
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When I execute MATCH (v:model) RETURN v SKIP 9000000 LIMIT 1000, nebula-graphd crashes toally on NebulaGraph Database

Some details are as follows The nebula version is 3.5.0. The deployment method is Standalone. And the installation method is RPM. The hardware memory is 8g。 Disk (SSD recommended) I want to know that when I execute MATCH (v:model) RETURN v SKIP…
user21630752
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After inserting a certain amount of data with nebula-java, no more data can be added

After using nebula-java to insert a certain amount of data, and then continue to insert data, the number of count remains unchanged at 201,000, and the java console does not report any errors. btw, nebula version is 3.4.1. enter image description…
idelle
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Failed to start Docker container after deploying a distributed graph database system

I have used two servers (demo1 and demo2) to achieve distributed deployment through Docker Swarm. | meta | storag | graph demo1 | meta0 | storag0 | graph demo2 | meta1 | storage1 | ---- demo2 | …
RebeccaR
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When using GO UNION and custom variables, the custom variable value will be changed

nebulagraph version: v3.2.1 description: when i use GO FROM or UNION or custom variables, the value of the custom variable $var1 will changed with whether the statement adds union. $var1 = (GO FROM '910306020230520104' OVER e_shareholder_invest…
idelle
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How to query all the edges of mushroom frontal points

How to query all edges connected by a node? I am not very familiar with ngql query language What is the right query statement? What sentence should I use? go clause or match clause? Can they both achieve this function? Is there any difference?
Mona Tao
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Does nGQL allow you to reference the VID of two tags in a query ? (rather the VID of one and the property of the other?

I use the following two queries in nGQL to create instances of two tags: INSERT VERTEX Topic (topicId, first_proposed, approval_status, followers, tagged_tally) VALUES 9999:("Sample topic id", TIMESTAMP(), "Pending", 10, 20); INSERT VERTEX…
Toby Derrum
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‘system_memory_high_watermark_ratio’ in NebulaGraph 3.4.1 isn't effective

Despite setting this configuration, I'm experiencing Out-of-Memory (OOM) errors, and the system kills the graph process instead of triggering a high watermark error. Could this issue be related to the memory tracker? # if use balance data feature,…
WillaNoel
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Execute failed: SyntaxError: syntax error near '” OVER c' occurs when executing a simple statement

I'm using Nebula version 1.0 and attempting to execute a command in a specific space. The command I am running is: GO FROM "player102" OVER call However, an exception is being thrown with the following error message: E0427 17:40:11.934425 66754…
Hadley
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How to handle multiple threads simultaneously modifying a vertex or edge in NebulaGraph?

How to handle multiple threads simultaneously modifying a vertex or edge in Nebula while performing operations on threads in Flink? Error message: insert failed: Storage Error: More than one request trying to add/update/delete one edge/vertex at the…
LeslieM
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Can two MATCH statements be put together and returned?

Here are the queries for example: match (v:uid) where id(v) == "1001" return v.uid.name as name1 match (v:uid) where id(v) == "1002" return v.uid.name as name2 I would like to be able to express the two SQL statements in one query, returning two…
MarieS
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Failed to start Dashboard 3.2.0 - 'Cannot read property ‘target’ of undefined'

I tried to start nebula-dashboard-3.2.0 but it reported an error, saying TypeError: Cannot read property 'target' of undefine [root@nebula-graph-dashboard-6f47c468b9-fr2zp nebula-dashboard]# ./dashboard [HPM] Proxy created: / ->…
idelle
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How to write a MATCH statement for bidirectional relationship patterns?

As shown in the figure, there are two nodes with bidirectional relationships in the pattern that needs to be matched. MATCH (a)-[e1:trans]->(b)-[e2:trans]->(c), (a)-[e1:trans]->(b)<-[e3:trans]->(c) return a,b,c,e1,e2,e3 The statement is not valid…
idelle
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