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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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Difference in executing queries

When I'm executing a query on my dataset, ti seems that there's a difference between queries MATCH (a)<--(b)-->(c) and MATCH (a)<--(b) MATCH (b)-->(c). The first one gives we 486 distinct results and the second one gives me only 334?
MPesi
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Do I need to create database scheme before I start with data ingestion?

I want to ingest data from Kafka data stream right into Memgraph. Do I need to define the types of data before I start the data ingestion?
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How to view log files while using Memgraph with Docker?

I am using Memgraph with Docker and I want to access today's log files. What is the easiest way to do that?
MPesi
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Finding weakly connected components in Memgraph graph

Does Memgraph have and algorithm for finding weakly connected components in graphs? I couldn't find it among Memgraph built-in algorithms or MAGE algorithms.
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What is the purpose of transformation module for Kafka streams?

Can someone tell me what is the purpose of transformation modules when it comes to ingesting data from Kafka to Memgraph?
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Can I connect to Neo4j server using Memgraph Lab?

I see that Memgraph has added support for Neo4j in the OGM and query builder. I know that there is no direct link between GQLAlchemy and Memgraph Lab but I wonder if it possible to connect to Neo4j server using Lab?
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How can I listen the Kafka stream from the start?

I've started the Kafka stream from mgconsole using this code: CREATE KAFKA STREAM music_stream TOPICS music-stars TRANSFORM music_books.music_stars CONSUMER_GROUP randomseed141234 BOOTSTRAP_SERVERS 'localhost:9093' CREDENTIALS…
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Is it possible to build a multigraph with Memgraph?

Is it possible to build a multigraph (interconnected multilayer network) with Memgraph?? Or will it be possible in near future?
MPesi
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Is there a Kafka stream of Spotify dataset for Memgraph?

I have found four sets that can be ingested directly into Memgraph at Awesome Streams site. I've also found a tutorial How to build a Spotify Recommendation Engine using Kafka and Memgraph. Is there a public stream of this dateset? I know that I can…
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How to log messages from query module procedure in Memgraph logs?

I am using Memgraph with Memgraph Platform Docker image, version 2.4.0 on MacOS. I started developing my own Python query module procedure in Memgraph Lab. It is not loading correctly because I have an error in my code, and then I am seeing the…
KateLatte
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What types of data are supported in Memgraph?

What data types are supported in Memgraph? Is there a difference between node and relationship types? Do I need to define data type in similar way that you define variable types in programing languages?
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How to run Memgraph using the same Memgraph platform Docker image but with volume?

Is there any info on how to run Memgraph using the same Memgraph platform Docker image, but with a volume so that the data persists between restarts?
MPesi
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How does Memgraph work with Kafka streams?

Does Memgraph act as a sink for streaming sources from Kafka, and then once the messages have been received, organize them into a graph database? If yes, how are these messages being organized. I don't get how the messages can be transformed from…
KateLatte
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How can I move transformation module to Memgraph that runs in Docker?

I'm trying to figure out how streaming with Kafka works in combination with Memgraph. I have a Memgraph running in a Docker container. I've created a module called music.py using Visual Studio Code but I can't save it into the docker. import…
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Does Memgraph have a Neo4j-compatible HTTP API?

A friend of mine has recommended me to write my program using Neo4j HTTP API to connect to Memgraph graphdatabase. I didn't manage to do that. Is this even possible or am I trying to do something that can not be done?
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