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Questions tagged [memgraphdb]

Use this tag for questions related to Memgraph streaming graph database.

Memgraph is an open source graph database built for real time streaming data, compatible with Neo4j. It is an in-memory graph database that uses Cypher as a query language. Memgraph can be extended with graph algorithms that are part of Memgraph Advanced Graph Extensions (MAGE). Graphs can be visualized using Memgraph Lab application.

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How good does Memgraph scale in terms of the performance?

I am evaluating different graph databases and I want to know how good does Memgraph scale in terms of the performance? Are there any benchmarks available that I can see and maybe run by myself?
KateLatte
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Memgraph: "Not yet implemented: atom expression"

I just started using Memgraph and I sometimes encounter the error message: "Not yet implemented: atom expression" . First I observed it when trying to use the neo4j-OGM and now I encounter it when checking for relations in a query. My query looks…
An Martin
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Is there a way to show count results on a graph in Memgraph Lab using GSS?

Is there any way to show count results on a graph in Memgraph Lab. For example, if I have a hashtag and tweets on a certain platform (Desktop, IOS, Android) under that hashtag, can I show a count of those on a graph and maybe display the circle in…
KateLatte
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Creating a query that clones nodes and adds different properties

I need a bit of help with creating a certain Cyper query in Memgraph. I want to copy each node in the database and for each create 3 clones with specifing different properties (e.g. every one of them has different id property). This is what I've…
MPesi
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What is the easiest way to import edge list data from a set of parquet files?

I've been working with a collection of files that are stored in Amazon S3, which happen to be in the parquet format. These files represent the edges of a graph I'm working on, and are structured with the following fields: src_id, dst_id, and…
Zet Hund Pet
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Synchronize data between Memgraph and elasticsearch

How is Memgraph dealing with deduplication? Especially between restarts. I've read the blog post but I couldn't find details on this topic.
Laschitk
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How can I connect to Memgraph via web-sockets and visualize graph results with Orb?

Is there a way that for me to connect to Memgraph via web-sockets and visualize graph results with Orb? I've seen something like this on Memgraph Playground and I would like to use it on my site.
Moraltox
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How to use on-disk storage with Memgraph and GQLAlchemy?

I am working on a project where I need to use Memgraph along with GQLAlchemy. I understand that Memgraph has a feature for on-disk storage, which allows users to store data on the disk rather than in-memory. I order to use this feature I must use…
Moraltox
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How to format the personalization vector for calculating personalized PageRank using nxalg in Memgraph MAGE?

I'm working on a query where I need to calculate the personalized PageRank using the nxalg module provided by Memgraph MAGE. I'm having trouble understanding how to properly represent the personalization vector in the personalisation parameter of…
Juliette Gia
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How do i run union with Memgraph query builder?

How do I run union with Memgraph query builder? I've read the documentation at https://memgraph.com/docs/gqlalchemy/how-to-guides/query-builder but I couldn't find anything.
TenTonBonton
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How to serialize GQLAlchemy model objects to JSON?

I want to serialize objects from Python objects to JSON properties. I'm using GQLAlchemy and Memgraph. So the question is, how can I serialize GQLAlchemy model objects to JSON?
GrandMel
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Is it possible to parse JSON and convert it to the GQLAchemy model object?

I've installed GQLAchemy using pip install gqlalchemy. Now I want to convert a dictionary object into the appropriate GraphObject. Is it possible to parse JSON and convert it to the GQLAchemy model object?
Juliette Gia
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Can GQLAlchemy be used to validate the scheme of the dataset?

Memgraph is schemaless, but some use cases require strict validation rules. Instead of enforcing the schema in Memgraph is there a way to enforce it easily in GQLAlchemy?
Juliette Gia
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Is there a way to create database trigger in Memgraph by using Python-native function calls?

I'd like to create and use database triggers in Memgraph. I'm using Python, so the best possible solution for me would be something that uses Python-native function calls. Is there a such thing?
Juliette Gia
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Supported datatypes for indexes when using GQLAlchemy and Memgrpah

I see Memgraph can index almost any datatype, which of these datatypes are supported if GQLAlchemy is used?
GrandMel
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