SystemDB

This is the APOC Extended documentation.

APOC Extended is not supported by Neo4j. For the officially supported APOC Core, go to the APOC Core page.

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 system database. They are a non-public implementation details of Neo4j and might change within minor release updates.

Table 1. Procedures
Qualified Name	Type	Release
apoc.systemdb.graph	`Procedure`	`Apoc Extended`
apoc.systemdb.execute	`Procedure`	`Apoc Extended`
apoc.systemdb.export.metadata	`Procedure`	`Apoc Extended`

Usage examples

CALL apoc.systemdb.graph() YIELD nodes, relationships RETURN *;
CALL apoc.systemdb.execute('SHOW DATABASES') YIELD row RETURN row.name as dbName;
CALL apoc.systemdb.execute(["CREATE USER foo SET PASSWORD 'test'", "GRANT ROLE myRole TO foo"])