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The GRANT <privileges> statement lets you control each role or user's SQL privileges for interacting with specific databases and tables.
For privileges required by specific statements, see the documentation for the respective SQL statement.
Synopsis
Required privileges
The user granting privileges must have the GRANT privilege on the target databases or tables.
Supported privileges
Roles and users can be granted the following privileges. Some privileges are applicable both for databases and tables, while other are applicable only for tables (see Levels in the table below).
- When a role or user is granted privileges for a database, new tables created in the database will inherit the privileges, but the privileges can then be changed.
- When a role or user is granted privileges for a table, the privileges are limited to the table.
- The
rootuser automatically belongs to theadminrole and has theALLprivilege for new databases. - For privileges required by specific statements, see the documentation for the respective SQL statement.
| Privilege | Levels |
|---|---|
ALL |
Database, Table |
CREATE |
Database, Table |
DROP |
Database, Table |
GRANT |
Database, Table |
SELECT |
Table |
INSERT |
Table |
DELETE |
Table |
UPDATE |
Table |
Parameters
| Parameter | Description |
|---|---|
table_name |
A comma-separated list of table names. Alternately, to grant privileges to all tables, use *. ON TABLE table.* grants apply to all existing tables in a database but will not affect tables created after the grant. |
database_name |
A comma-separated list of database names. Privileges granted on databases will be inherited by any new tables created in the databases, but do not affect existing tables in the database. |
user_name |
A comma-separated list of users and/or roles to whom you want to grant privileges. |
Examples
Grant privileges on databases
> GRANT CREATE ON DATABASE db1, db2 TO maxroach, betsyroach;
> SHOW GRANTS ON DATABASE db1, db2;
+----------+------------+------------+
| Database | User | Privileges |
+----------+------------+------------+
| db1 | betsyroach | CREATE |
| db1 | maxroach | CREATE |
| db1 | root | ALL |
| db2 | betsyroach | CREATE |
| db2 | maxroach | CREATE |
| db2 | root | ALL |
+----------+------------+------------+
(6 rows)
Grant privileges on specific tables in a database
> GRANT DELETE ON TABLE db1.t1, db1.t2 TO betsyroach;
> SHOW GRANTS ON TABLE db1.t1, db1.t2;
+-------+------------+------------+
| Table | User | Privileges |
+-------+------------+------------+
| t1 | betsyroach | DELETE |
| t1 | root | ALL |
| t2 | betsyroach | DELETE |
| t2 | root | ALL |
+-------+------------+------------+
(4 rows)
Grant privileges on all tables in a database
> GRANT SELECT ON TABLE db2.* TO henryroach;
> SHOW GRANTS ON TABLE db2.*;
+-------+------------+------------+
| Table | User | Privileges |
+-------+------------+------------+
| t1 | henryroach | SELECT |
| t1 | root | ALL |
| t2 | henryroach | SELECT |
| t2 | root | ALL |
+-------+------------+------------+
(4 rows)
Make a table readable to every user in the system
> GRANT SELECT ON TABLE myTable TO public;
> SHOW GRANTS ON TABLE myTable;
database_name | schema_name | table_name | grantee | privilege_type
+---------------+-------------+------------+---------+----------------+
defaultdb | public | mytable | admin | ALL
defaultdb | public | mytable | public | SELECT
defaultdb | public | mytable | root | ALL
(3 rows)
See also
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