SET ROLE

Function

Sets the current user identifier of the current session.

Precautions

• Users of the current session must be members of specified rolename, but the system administrator can choose any roles.
• Executing this command may add rights for a user or take away some of the rights they have. If the role of a session user has the INHERITS attribute, it is automatically assigned all the rights of the roles assigned by the SET ROLE command. In this case, SET ROLE physically deletes all rights directly granted to session users and rights of its belonging roles and only the rights of the specified roles remain. If the role of the session user has the NOINHERITS attribute, SET ROLE deletes rights directly granted to the session user and obtains rights of the specified role.

Syntax

• Set the current user identifier of the current session.

  1	SET [ SESSION | LOCAL ] ROLE role_name PASSWORD '{password}';

• Reset the current user identifier to that of the current session.

  1	RESET ROLE;

Parameter Description

• SESSION

  Specifies that the command takes effect only for the current session. This parameter is used by default.

  Value range: a string. It must comply with the naming convention rule.

• LOCALE

  Indicates that the specified command takes effect only for the current transaction.

• role_name

  Specifies the role name.

  Value range: a string. It must comply with the naming convention rule.

• password

  Specifies the password of a role. It must comply with the password convention.

• RESET ROLE

  Resets the current user identifier.

Examples

Set the current user to paul:

1

SET ROLE paul PASSWORD '{password}';

View the current session user and the current user:

1

SELECT SESSION_USER, CURRENT_USER;

Reset the current user:

1

RESET role;