Neo4j Schema Discovery

Overview

The Neo4j Schema Discovery Snap retrieves the node labels, relationship types, and property keys defined in the target Neo4j database.

The Snap requires no configuration beyond an account. Use it to inspect an unfamiliar graph before building a pipeline, or to drive downstream Snaps that iterate over the labels present in the database. The Snap reads schema metadata only; it does not return node or relationship data.


Neo4j Schema Discovery
  • This is a Read-type Snap.

Supported Accounts

Snap views

Type Description Examples of upstream and downstream Snaps
Input

This Snap has at most one document input view.

The Snap ignores the content of the incoming document; connecting an input view only controls when the Snap runs.
Output

This Snap has one document output view.

The Snap emits the node labels, relationship types, and property keys defined in the database named in the account.
Learn more about Error handling.

Snap settings

Note: Learn about the common controls in the Snap settings dialog.
Field/Field set Description

Label*

String

Specify a unique name for the Snap. Modify this to be more appropriate, especially if more than one of the same Snaps is in the pipeline.

Default value: Neo4j Schema Discovery

Snap execution

Dropdown list
Choose one of the three modes in which the Snap executes. Available options are:
  • Validate & Execute: Performs limited execution of the Snap and generates a data preview during pipeline validation. Subsequently, performs full execution of the Snap (unlimited records) during pipeline runtime.
  • Execute only: Performs full execution of the Snap during pipeline execution without generating preview data.
  • Disabled: Disables the Snap and all Snaps that are downstream from it.

Default value: Validate & Execute

Troubleshooting

Error Reason Resolution
Neo4j operation failed The account does not have the privileges required to call db.labels(), db.relationshipTypes(), or db.propertyKeys() on the target database. Grant the account the SHOW CONSTRAINTS and ACCESS DATABASE privileges on the target database, or use a database administrator account.