In Neo4j 4.0 the concept of multi-database was introduced. There’s now a database called
system which contains some
internal information, e.g. configured permissions. Those can be exposed by APOC.
Do not rely on the data structures within
systemdatabase. They are a non-public implementation details of Neo4j and might change within minor release updates.
executes an DDL command on system db, yields
CALL apoc.systemdb.graph() YIELD nodes, relationships RETURN *; CALL apoc.systemdb.execute('SHOW DATABASES') YIELD row RETURN row.name as dbName;