Version 1.2 to 2.0
Beginning with Version 1.2, one TigerGraph instance can manage multiple graphs, each with its own set of user privileges. This first-of-its-kind capability, dubbed MultiGraph, is available as an optional service in the Enterprise Edition of the TigerGraph platform.Â MultiGraph enables several powerful use cases:
: Use one TigerGraph instance to support several completely separate data sets, each with its own set of users. Each user community is unaware of the other user communities or other data sets.
Fine-grained privileges on the same set of data
: Role-based access control, available on single graphs, grants permission for the privilege to run queries (include data modification queries). In a single graph scheme, there is not a way to say “Query X can be run by some users but not by others.” Using multiple graphs defined over the same set of data, each graph can have its own set of queries and own set of users, in effect customizing who can run which queries.
: Graphs can partially overlap, to enable a combination of shared and private data.
: A Graph X can be defined to cover the domains of Graphs Y and Z, that is, Graph X = (Graph Y) U (Graph Z). This provides
way to describe a data partitioning or parent-child structure. (This is not the same as defining sub-classes of data types; data types are still independent.)
If you implement only one graph now, you can upgrade to MultiGraph and add additional graphs at any time, without having to redo your existing design.
While the system has the inherent capability of managing multiple graphs, the ability of users to create more than one graph may depend on your license key.
To support the new MultiGraph capabilities, a few changes to the previous specifications are necessary. These changes affect all users, even if only a single graph is deployed. We advise all users to read the
There are also several
Graphs and Graph Domains
is a defined as a set of vertex types and edge types. More precisely, it is all the vertices and edges of that collection of types. The
of a graph is its set of vertex types and edge types.
Graph-Specific Roles and Privileges
The TigerGraph system includes several predefined
Each role is a fixed and logical set of privileges to perform operations. In order to access a graph, a user must be granted a role on that graph. Without a role, a user has no meaningful access.
Setting a Working Graph
Previously, there was only one graph, and so all users were automatically able to use that graph.
Note that the CREATE commands for queries, loading jobs, and schema_change jobs have always required that the graph name be specified, even when there was support for only one graph. Now, it is clear that these definitions are graph-specific.
New and Modified Specifications
If you are a user of an earlier TigerGraph system (v1.1 or earlier), please note the following specifications have changed.
- Set the working graph in GSQL: You must always set the working graph, either using the -g flag with the gsql command, or by using the USE GRAPH command.
RESTPP Endpoint changes: Endpoints which pertain to the graph data have been modified to include the name of the graph in the request URL.
RESTPP API User Guide
User Authentication secrets and tokens: The way in which secrets and tokens are created and used has changed, in order to follow OAuth standards more closely.
Managing User Privileges and Authentication v2.1
Changes to privileges of certain roles: If you had been using only the single default user with
privilege, you will not notice any difference. That user has been promoted to
status. If you are making use of users with different roles, note the following changes in privileges:
A new top-level role,
, is defined. The superuser has admin privilege on all graphs, and is the only role who can
and modify shared vertex types, shared edge types, and graphs.
role is renamed
role is renamed
The following commands are now shifted from
roles to the
- CREATE / DROP VERTEX|EDGE|GRAPH
- CLEAR GRAPH STORE
- DROP ALL
Newly created users no longer automatically have the
role. They have no role until explicitly granted one.
- A new top-level role,
- In the CREATE VERTEX statement, the WITH STATS option “outdegree” is no longer available. “outdegree_by_edgetype” is still supported and is the default.
There are many other details about using the MultiGraph feature, especially if your application has mulitple users with different roles. In the documentation, the Multiple Graph logo is placed next to relevant topics:
The following commands are new. This section provides only a summary list. For full details and examples, see the main documentation for the relevant topics.
USE GRAPH <graph_name>
- For all users
- Sets the given graph as the user’s working graph.
- For superusers
- Must be set to have privilege to create and assign global vertex and edge types.
CREATE GLOBAL SCHEMA_CHANGE JOB
- For superusers