Neo4j

chrszrkl · 04-30-2022

I have long running queries which create/change a lot of nodes and relationships and take they usually take a few minutes to complete. I run these queries from a serverless function on AWS Lambda, so I'm charged on the execution time and also limited...

chrszrkl · 01-24-2022

I'm automatically adding system properties to nodes and edges which are only relevant to the system but shouldn't be returned to the user during a Cyper match query. These properties start with '$', so it would be possible to filter them by property ...

chrszrkl · 12-21-2021

We authored a custom Transaction Listener Extension following this example. It's been packed and deployed as a plugin to a local Neo4j 4.2.1 instance. We also added a custom setting to the corresponding neo4j.conf configuration as key-value-pair, but...

chrszrkl · 03-16-2021

I'd like to query and count orders in my database and return a row for each day of the week (Mon-Sun) and 24 columns for each hour of the day (0:00 - 23:00). The return should be like this: DayOfWeek | 0:00 | 1:00 | 2:00 | 3:00 | 4:00 | 5:00 | ...

chrszrkl · 12-09-2020

Hi, my graph schema is partly dynamic and the nodes can have different properties for the same label. For example, a Product node could have an ISBN property if it is a Book, a Serial Number if it is an Electronic Device, or some other product specif...

chrszrkl · 05-08-2022

Interesting idea! I did a quick search and found the [apoc.export.*.query] procedures (apoc.export.json.query - APOC Documentation) to export the result of a query in JSON or CSV to a given file. I'd prefer to connect via drivers to the database inst...

chrszrkl · 05-07-2022

Do you mean to start the script with apoc.cypher.runFile(file or url,[{config}]) as query from AWS Lambda, or to start the script with cypher-shell? In the first case, my expectation was that query would be cancelled if Lambda closes the database con...

chrszrkl · 01-27-2022

Thanks for the reference. The Cypher queries are being executed by an API that acts as a middleware between the user and Neo4j. The users can pass arbitrary queries to the API and get the results, without interacting with the DB directly. Currently, ...

chrszrkl · 01-27-2022

Hi David, thank you for this answer! That sounds of course like the most reasonable option. However, I would still be interested how this can be achieved via an extension. Do have any resources on that?

chrszrkl · 03-21-2021

I further improved my Cypher query with a variable StartDate and calculated EndDate, which will be calculated by adding X days/weeks/months etc. onto the StartDate. Moreover, instead of providing a static list of WeekDays like in my example above, I ...

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Submit query and pick up the results later?

Hide properties from being returned by neo4j

Read custom neo4j.conf settings from extension

Count and nodes for each day of week and each hour

Update full-text search index with new node properties

Re: Submit query and pick up the results later?

Re: Submit query and pick up the results later?

Re: Hide properties from being returned by neo4j

Re: Hide properties from being returned by neo4j

Re: Count and nodes for each day of week and each hour