The GRANT statement controls each role or user's SQL privileges for interacting with specific databases, schemas, tables, or user-defined types. For privileges required by specific statements, see the documentation for the respective SQL statement.
You can use GRANT to directly grant privileges to a role or user, or you can grant membership to an existing role, which grants that role's privileges to the grantee. Users granted a privilege with WITH GRANT OPTION can in turn grant that privilege to others. The owner of an object implicitly has the GRANT OPTION for all privileges, and the GRANT OPTION is inherited through role memberships.
For new databases, users with the following roles are automatically granted the ALL privilege:
- Every user who is part of the
adminrole (including therootuser). - Every user who is part of the
ownerrole for the new database.
The GRANT statement performs a schema change. For more information about how online schema changes work in CockroachDB, see Online Schema Changes.
Syntax
Parameters
| Parameter | Description |
|---|---|
ALLALL PRIVILEGES |
Grant all privileges. |
privilege_list |
A comma-separated list of privileges to grant. For guidelines, see Managing privileges. |
grant_targets |
A comma-separated list of database, table, sequence, or function names. The list should be preceded by the object type (e.g., DATABASE mydatabase). If the object type is not specified, all names are interpreted as table or sequence names. |
target_types |
A comma-separated list of user-defined types. |
ALL SEQUENCES IN SCHEMA |
Grant privileges on all sequences in a schema or list of schemas. |
ALL TABLES IN SCHEMA |
Grant privileges on all tables and sequences in a schema or list of schemas. |
ALL FUNCTIONS IN SCHEMA |
Grant privileges on all user-defined functions in a schema or list of schemas. |
schema_name_list |
A comma-separated list of schemas. |
role_spec_list |
A comma-separated list of roles. |
WITH ADMIN OPTION |
Designate the user as a role admin. Role admins can grant or revoke membership for the specified role. |
WITH GRANT OPTION |
Allow the user to grant the specified privilege to others. |
Supported privileges
Roles and users can be granted the following privileges:
| Privilege | Levels | Description |
|---|---|---|
ALL |
System, Database, Schema, Table, Sequence, Type | For the object to which ALL is applied, grants all privileges at the system, database, schema, table, sequence, or type level. |
BACKUP |
System, Database, Table | Grants the ability to create backups at the system, database, or table level. |
CANCELQUERY |
System | Grants the ability to cancel queries. |
CHANGEFEED |
Table | Grants the ability to create changefeeds on a table. |
CONNECT |
Database | Grants the ability to view a database's metadata, which consists of objects in a database's information_schema and pg_catalog system catalogs. This allows the role to view the database's table, schemas, user-defined types, and list the database when running SHOW DATABASES. The CONNECT privilege is also required to run backups of the database. |
CONTROLJOB |
System | Grants the ability to pause, resume, and cancel jobs. Non-admin roles cannot control jobs created by admin roles. |
CREATE |
Database, Schema, Table, Sequence | Grants the ability to create objects at the database, schema, table, or sequence level. When applied at the database level, grants the ability to configure multi-region zone configs. |
CREATEDB |
System | Grants the ability to create or rename a database. |
CREATELOGIN |
System | Grants the ability to manage authentication using the WITH PASSWORD, VALID UNTIL, and LOGIN/NOLOGIN role options. |
CREATEROLE |
System | Grants the ability to create, modify, or delete non-admin roles. |
DELETE |
Table, Sequence | Grants the ability to delete objects at the table or sequence level. |
DROP |
Database, Table, Sequence | Grants the ability to drop objects at the database, table, or sequence level. |
EXECUTE |
Function | Grants the ability to execute functions. |
EXTERNALCONNECTION |
System | Grants the ability to connect to external systems such as object stores, key management systems, Kafka feeds, or external file systems. Often used in conjunction with the BACKUP, RESTORE, and CHANGEFEED privilege. |
EXTERNALIOIMPLICITACCESS |
System | Grants the ability to interact with external resources that require implicit access. |
INSERT |
Table, Sequence | Grants the ability to insert objects at the table or sequence level. |
MODIFYCLUSTERSETTING |
System | Grants the ability to modify cluster settings. |
MODIFYSQLCLUSTERSETTING |
System | Grants the ability to modify SQL cluster settings (cluster settings prefixed with sql.). |
NOSQLLOGIN |
System | Prevents roles from connecting to the SQL interface of a cluster. |
RESTORE |
System, Database | Grants the ability to restore backups at the system or database level. Refer to RESTORE Required privileges for more details. |
SELECT |
Table, Sequence | Grants the ability to run selection queries at the table or sequence level. |
UPDATE |
Table, Sequence | Grants the ability to run update statements at the table or sequence level. |
USAGE |
Schema, Sequence, Type | Grants the ability to use schemas, sequences, or user-defined types. |
VIEWACTIVITY |
System | Grants the ability to view other user's activity statistics of a cluster. |
VIEWACTIVITYREDACTED |
System | Grants the ability to view other user's activity statistics, but prevents the role from accessing the statement diagnostics bundle in the DB Console, and viewing some columns in introspection queries that contain data about the cluster. |
VIEWCLUSTERMETADATA |
System | Grants the ability to view range information, data distribution, store information, and Raft information. |
VIEWCLUSTERSETTING |
System | Grants the ability to view cluster settings and their values. |
VIEWDEBUG |
System | Grants the ability to view the Advanced Debug Page of the DB Console and work with the debugging and profiling endpoints. |
VIEWJOB |
System | Grants the ability to view jobs on the cluster. |
VIEWSYSTEMTABLE |
System | Grants read-only access (SELECT) on all tables in the system database, without granting the ability to modify the cluster. This privilege was introduced in v23.1.11. |
ZONECONFIG |
Database, Table, Sequence | Grants the ability to configure replication zones at the database, table, and sequence level. |
Required privileges
To grant privileges, the user granting the privileges must also have the privilege being granted on the target database or tables. For example, a user granting the
SELECTprivilege on a table to another user must have theSELECTprivileges on that table andWITH GRANT OPTIONonSELECT.To grant roles, the user granting role membership must be a role admin (i.e., members with the
WITH ADMIN OPTION) or a member of theadminrole. To grant membership to theadminrole, the user must haveWITH ADMIN OPTIONon theadminrole.
Details
Granting privileges
When a role or user is granted privileges for a table, the privileges are limited to the table. The user does not automatically get privileges to new or existing tables in the database. To grant privileges to a user on all new and/or existing tables in a database, see Grant privileges on all tables in a database.
For privileges required by specific statements, see the documentation for the respective SQL statement.
Granting roles
- Users and roles can be members of roles.
- The
rootuser is automatically created as anadminrole and assigned theALLprivilege for new databases. - All privileges of a role are inherited by all its members.
- Membership loops are not allowed (direct:
A is a member of B is a member of Aor indirect:A is a member of B is a member of C ... is a member of A).
Limitations
User/role management operations (such as GRANT and REVOKE) are schema changes. As such, they inherit the limitations of schema changes.
For example, schema changes wait for concurrent transactions using the same resources as the schema changes to complete. In the case of role memberships being modified inside a transaction, most transactions need access to the set of role memberships. Using the default settings, role modifications require schema leases to expire, which can take up to 5 minutes.
This means that long-running transactions elsewhere in the system can cause user/role management operations inside transactions to take several minutes to complete. This can have a cascading effect. When a user/role management operation inside a transaction takes a long time to complete, it can in turn block all user-initiated transactions being run by your application, since the user/role management operation in the transaction has to commit before any other transactions that access role memberships (i.e., most transactions) can make progress.
If you want user/role management operations to finish more quickly, and do not care whether concurrent transactions will immediately see the side effects of those operations, set the session variable allow_role_memberships_to_change_during_transaction to true.
When this session variable is enabled, any user/role management operations issued in the current session will only need to wait for the completion of statements in other sessions where allow_role_memberships_to_change_during_transaction is not enabled.
To accelerate user/role management operations across your entire application, you have the following options:
- Set the session variable in all sessions by passing it in the client connection string.
Apply the
allow_role_memberships_to_change_during_transactionsetting globally to an entire cluster using theALTER ROLE ALLstatement:ALTER ROLE ALL SET allow_role_memberships_to_change_during_transaction = true;
Examples
Setup
The following examples use MovR, a fictional vehicle-sharing application, to demonstrate CockroachDB SQL statements. For more information about the MovR example application and dataset, see MovR: A Global Vehicle-sharing App.
To follow along, run cockroach demo to start a temporary, in-memory cluster with the movr dataset preloaded:
$ cockroach demo
Grant privileges on databases
CREATE USER IF NOT EXISTS max WITH PASSWORD 'roach';
GRANT ALL ON DATABASE movr TO max WITH GRANT OPTION;
SHOW GRANTS ON DATABASE movr;
database_name | grantee | privilege_type | is_grantable
----------------+---------+-----------------+--------------
movr | admin | ALL | true
movr | max | ALL | true
movr | root | ALL | true
(3 rows)
Grant privileges on specific tables in a database
GRANT DELETE ON TABLE rides TO max;
SHOW GRANTS ON TABLE rides;
database_name | schema_name | table_name | grantee | privilege_type | is_grantable
----------------+-------------+------------+---------+-----------------+--------------
movr | public | rides | admin | ALL | true
movr | public | rides | max | DELETE | false
movr | public | rides | root | ALL | true
(3 rows)
Grant privileges on all tables in a database or schema
To grant all the privileges on existing tables to a user:
GRANT ALL ON * TO max;
SHOW GRANTS ON TABLE movr.public.*;
database_name | schema_name | table_name | grantee | privilege_type | is_grantable
----------------+-------------+----------------------------+---------+----------------+---------------
movr | public | promo_codes | admin | ALL | t
movr | public | promo_codes | demo | ALL | t
movr | public | promo_codes | max | ALL | f
movr | public | promo_codes | root | ALL | t
movr | public | rides | admin | ALL | t
movr | public | rides | demo | ALL | t
movr | public | rides | max | ALL | f
movr | public | rides | max | UPDATE | t
movr | public | rides | root | ALL | t
movr | public | user_promo_codes | admin | ALL | t
movr | public | user_promo_codes | demo | ALL | t
movr | public | user_promo_codes | max | ALL | f
movr | public | user_promo_codes | root | ALL | t
movr | public | users | admin | ALL | t
movr | public | users | demo | ALL | t
movr | public | users | max | ALL | f
movr | public | users | root | ALL | t
movr | public | vehicle_location_histories | admin | ALL | t
movr | public | vehicle_location_histories | demo | ALL | t
movr | public | vehicle_location_histories | max | ALL | f
movr | public | vehicle_location_histories | root | ALL | t
movr | public | vehicles | admin | ALL | t
movr | public | vehicles | demo | ALL | t
movr | public | vehicles | max | ALL | f
movr | public | vehicles | public | SELECT | f
movr | public | vehicles | root | ALL | t
(26 rows)
To ensure that anytime a new table is created, all the privileges on that table are granted to a user, use ALTER DEFAULT PRIVILEGES:
ALTER DEFAULT PRIVILEGES FOR ALL ROLES GRANT ALL ON TABLES TO max;
To check that this is working as expected, create a table:
CREATE TABLE IF NOT EXISTS usertable(x INT);
Then, check that the all privileges on the newly created table are granted to the user you specified using SHOW GRANTS:
SHOW GRANTS ON TABLE usertable;
database_name | schema_name | table_name | grantee | privilege_type | is_grantable
----------------+-------------+------------+---------+----------------+---------------
movr | public | usertable | admin | ALL | t
movr | public | usertable | demo | ALL | t
movr | public | usertable | max | ALL | f
movr | public | usertable | root | ALL | t
(4 rows)
Grant system-level privileges on the entire cluster
System-level privileges live above the database level and apply to the entire cluster.
root and admin users have system-level privileges by default, and are capable of granting it to other users and roles using the GRANT statement.
For example, the following statement allows the user maxroach to use the SET CLUSTER SETTING statement by assigning the MODIFYCLUSTERSETTING system privilege:
CREATE USER IF NOT EXISTS maxroach WITH PASSWORD 'setecastronomy';
GRANT SYSTEM MODIFYCLUSTERSETTING TO maxroach;
Make a table readable to every user in the system
GRANT SELECT ON TABLE vehicles TO public;
SHOW GRANTS ON TABLE vehicles;
database_name | schema_name | table_name | grantee | privilege_type | is_grantable
----------------+-------------+------------+---------+-----------------+--------------
movr | public | vehicles | admin | ALL | true
movr | public | vehicles | max | SELECT | false
movr | public | vehicles | public | SELECT | false
movr | public | vehicles | root | ALL | true
(4 rows)
Grant privileges on schemas
CREATE SCHEMA IF NOT EXISTS cockroach_labs;
GRANT ALL ON SCHEMA cockroach_labs TO max WITH GRANT OPTION;
SHOW GRANTS ON SCHEMA cockroach_labs;
database_name | schema_name | grantee | privilege_type | is_grantable
----------------+----------------+---------+-----------------+--------------
movr | cockroach_labs | admin | ALL | true
movr | cockroach_labs | max | ALL | true
movr | cockroach_labs | root | ALL | true
(3 rows)
Grant privileges on user-defined types
To grant privileges on user-defined types, use the following statements.
CREATE TYPE IF NOT EXISTS status AS ENUM ('available', 'unavailable');
GRANT ALL ON TYPE status TO max WITH GRANT OPTION;
SHOW GRANTS ON TYPE status;
database_name | schema_name | type_name | grantee | privilege_type | is_grantable
----------------+-------------+-----------+---------+-----------------+--------------
movr | public | status | admin | ALL | true
movr | public | status | demo | ALL | false
movr | public | status | max | ALL | true
movr | public | status | public | USAGE | false
movr | public | status | root | ALL | true
(5 rows)
Grant the privilege to manage the replication zones for a database or table
GRANT ZONECONFIG ON TABLE rides TO max;
The user max can then use the CONFIGURE ZONE statement to add, modify, reset, or remove replication zones for the table rides.
Grant role membership
CREATE ROLE IF NOT EXISTS developer WITH CREATEDB;
CREATE USER IF NOT EXISTS abbey WITH PASSWORD 'lincoln';
GRANT developer TO abbey;
SHOW GRANTS ON ROLE developer;
role_name | member | is_admin | is_grantable
------------+--------+-----------+-----------
developer | abbey | false | false
(1 row)
Grant the admin option
GRANT developer TO abbey WITH ADMIN OPTION;
SHOW GRANTS ON ROLE developer;
role_name | member | is_admin | is_grantable
------------+--------+-----------+-----------
developer | abbey | true | true
(1 row)
Grant privileges with the option to grant to others
GRANT UPDATE ON TABLE rides TO max WITH GRANT OPTION;
SHOW GRANTS ON TABLE rides;
database_name | schema_name | table_name | grantee | privilege_type | is_grantable
----------------+-------------+------------+---------+-----------------+--------------
movr | public | rides | admin | ALL | true
movr | public | rides | max | UPDATE | true
movr | public | rides | root | ALL | true
(3 rows)
See also
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