Join order benchmark for graph databases

This was made mainly for neo4j. The data create* scripts use APOC libary functions. Without them, Neo4j will hit OOM errors, due to the size of the data set.
Took about 1 hour to run on a AWS EC2 r4.xlarge instance (4 vCPUs, 30.5 GiB) + EBS storage. Tested with Neo4j Community Edition 3.5.16 AMI.

Running cypher

There are two ways to run .cypher files:

• By piping from stdin: cat <file>.cypher | cypher-shell -u <username> -p <password> --format plain
• Or by interacting with cyper-shell and calling CALL apoc.cypher.run[File|SchemaFile](...)

To load

1. Download the csv files, and place into Neo4j's import directory, which by default is /var/lib/neo4j/import (will be the starting point for file:/// inside cypher).
2. To create the schema, pipe the file/run in cypher-shell CALL apoc.cypher.runSchemaFile("<import directory>/create_schema.cypher")
3. To create the nodes, pipe the file/run in cypher-shell CALL apoc.cypher.runFile("<import directory>/create_nodes.cypher")
4. To create relationships, pipe the file/run in cypher-shell CALL apoc.cypher.runFile("<import directory>/create_relationships.cypher")

To run cypher queries

1. Pipe the file/run in cypher-shell CALL apoc.cypher.runFile("<import directory>/1a.cypher")

Note for Neo4j Community Edition 3.5.16 AMI

• To change Neo4j configuration (neo4j.conf) on the AMI, do not edit neo4j.conf as it gets rewritten anyways by neo4j.template file - edit that file instead. See here.
• The default username is "neo4j" and password the instance ID, e.g. "i-08407a097a5c5d20e".