SET SESSION AUTHORIZATION

Impersonate another user for the current session. Learn how to assume the identity and privileges of another account for testing or administration.

This statement is available from MariaDB 12.0.

Certain users can perform server actions as another user:

• This is implemented through the SET SESSION AUTHORIZATION statement.

• This permits everything that can be done in a stored procedure with an arbitrary definer.

• In particular, this bypasses account lock, expired password, authentication, REQUIRE SSL checks, and so on.

• Users are required to have the SET USER privilege.

• Does not work inside transactions, prepared statements and stored procedures.

Examples

SELECT USER(), CURRENT_USER(), DATABASE();

+--------------------+--------------------+------------+
| user()             | current_user()     | database() |
+--------------------+--------------------+------------+
| msandbox@localhost | msandbox@localhost | test       |
+--------------------+--------------------+------------+
1 row in set (0.000 sec)

SET SESSION AUTHORIZATION foo@localhost;
SELECT USER(), CURRENT_USER(), DATABASE();

+---------------+----------------+------------+
| user()        | current_user() | database() |
+---------------+----------------+------------+
| foo@localhost | foo@%          | NULL       |
+---------------+----------------+------------+

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