Overview
The open graph is schema-free, requiring no explicit schema definitions before data insertion. You can directly insert nodes and edges into the graph, and their labels and properties are created on the fly. This offers maximum flexibility for early-stage data exploration.
In an open graph,
- Each node or edge can have zero, one, or multiple labels.
- Each node or edge has its own set of properties.
Open graphs do not require explicit definitions of labels and properties; they are automatically created as you insert nodes and edges into the graph. However, you still have the option to manually create labels beforehand if desired.
Creating Open Graph
To create an open graph g1:
CREATE GRAPH g1 ANY
The ANY keyword identifies an open graph.
Showing Labels
To show labels in the current graph:
SHOW LABEL
To show node labels in the current graph:
SHOW NODE LABEL
To show edge labels in the current graph:
SHOW EDGE LABEL
Each label provides the following essential metadata:
Field |
Description |
|---|---|
label_name |
The name of the label. |
label_id |
The ID of the label. |
Creating Label
You can create new labels within an open graph.
To create a node label User within the current graph:
CREATE LABEL User ON NODE
To create an edge label Transfers within the current graph:
CREATE LABEL Transfers ON EDGE
Dropping Label
You can delete labels from a graph. Deleting a label will not remove the nodes or edges that use it.
To drop the node label Person from the current graph:
DROP NODE LABEL Person
To drop the edge label LINKS from the current graph:
DROP EDGE LABEL LINKS