REVOKE <privileges> From a User or Role

Removes one or more privileges on a securable object from a user or role. The privileges that can be granted are grouped into the following categories:

• Privileges for schema objects (databases, tables, views, stages, UDFs)

Syntax

REVOKE { 
        schemaObjectPrivileges | ALL [ PRIVILEGES ] ON <privileges_level>
       }
TO [ROLE <role_name>] [<user>]

Where:

schemaObjectPrivileges ::=
-- For TABLE
  { SELECT | INSERT }

-- For SCHEMA
  { CREATE | DROP | ALTER }

-- For USER
  { CREATE USER }

-- For ROLE
  { CREATE ROLE}

-- For STAGE
  { CREATE STAGE}

privileges_level ::=
    *.*
  | db_name.*
  | db_name.tbl_name

Examples

Revoke Privileges from a User

创建用户：

CREATE USER user1 IDENTIFIED BY 'abc123';

Grant the SELECT,INSERT privilege on all existing tables in the default database to the user user1:

GRANT SELECT,INSERT ON default.* TO user1;

SHOW GRANTS FOR user1;
+---------------------------------------------------+
| Grants                                            |
+---------------------------------------------------+
| GRANT SELECT,INSERT ON 'default'.* TO 'user1'@'%' |
+---------------------------------------------------+

Revoke INSERT privilege from user user1:

REVOKE INSERT ON default.* FROM user1;

SHOW GRANTS FOR user1;
+--------------------------------------------+
| Grants                                     |
+--------------------------------------------+
| GRANT SELECT ON 'default'.* TO 'user1'@'%' |
+--------------------------------------------+

Revoke Privileges from a Role

Grant the SELECT,INSERT privilege on all existing tables in the mydb database to the role role1:

Create role:

CREATE ROLE role1;

Grant privileges to the role:

GRANT SELECT,INSERT ON mydb.* TO ROLE role1;

Show the grants for the role:

SHOW GRANTS FOR ROLE role1;
+--------------------------------------------+
| Grants                                     |
+--------------------------------------------+
| GRANT SELECT,INSERT ON 'mydb'.* TO 'role1' |
+--------------------------------------------+

Revoke INSERT privilege from role role1:

REVOKE INSERT ON mydb.* FROM ROLE role1;

SHOW GRANTS FOR ROLE role1;
+-------------------------------------+
| Grants                              |
+-------------------------------------+
| GRANT SELECT ON 'mydb'.* TO 'role1' |
+-------------------------------------+