ALTER ROLE

ALTER ROLE alters the attributes of an existing role.

Syntax

Field	Use
role_name	A name for the role.

`alter_role_attributes`

Field	Use
INHERIT	Grants the role the ability to inherit privileges of other roles.

`alter_role_set`

Field	Use
name	The name of the configuration parameter to modify.
value	The value to assign to the configuration parameter.
DEFAULT	Reset the value of the configuration parameter for the specified role to the system’s default. Equivalent to `ALTER ROLE ... RESET`.

Details

Unlike PostgreSQL, Materialize derives the LOGIN and SUPERUSER attributes for a role during authentication, every time that role tries to connect to Materialize. Therefore, you cannot specify either attribute when altering an existing role.

Unlike PostgreSQL, Materialize does not currently support the NOINHERIT attribute and the SET ROLE command.

You may not specify redundant or conflicting sets of options. For example, Materialize will reject the statement ALTER ROLE ... INHERIT INHERIT.

Unlike PostgreSQL, Materialize does not use role attributes to determine a roles ability to create top level objects such as databases and other roles. Instead, Materialize uses system level privileges. See GRANT PRIVILEGE for more details.

Like PostgreSQL, altering the configuration parameter for a role only affects new sessions. Also like PostgreSQL, role configuration parameters are not inherited. To view the current configuration parameter defaults for a role, see mz_role_parameters.

Examples

Altering the attributes of a role

ALTER ROLE rj INHERIT;

SELECT name, inherit FROM mz_roles WHERE name = 'rj';

rj  true

Setting configuration parameters for a role

SHOW cluster;
quickstart

ALTER ROLE rj SET cluster TO rj_compute;

-- Role parameters only take effect for new sessions.
SHOW cluster;
quickstart

-- Start a new SQL session with the role 'rj'.
SHOW cluster;
rj_compute

-- In a new SQL session with a role that is not 'rj'.
SHOW cluster;
quickstart

Non-inheritance

CREATE ROLE team;
CREATE ROLE member;

ALTER ROLE team SET cluster = 'team_compute';
GRANT team TO member;

-- Start a new SQL session with the Role 'member'.
SHOW cluster;
quickstart

Privileges

The privileges required to execute this statement are:

CREATEROLE privileges on the system.