PostgreSQL 9.2.3 Documentation
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# 45.61. `pg_roles`

The view `pg_roles` provides access to information about database roles. This is simply a publicly readable view of `pg_authid` that blanks out the password field.

This view explicitly exposes the OID column of the underlying table, since that is needed to do joins to other catalogs.

Table 45-62. `pg_roles` Columns

Name | Type | References | Description
--- | --- | --- | ---
`rolname` | `name` |  | Role name
`rolsuper` | `bool` |  | Role has superuser privileges
`rolinherit` | `bool` |  | Role automatically inherits privileges of roles it is a member of
`rolcreaterole` | `bool` |  | Role can create more roles
`rolcreatedb` | `bool` |  | Role can create databases
`rolcatupdate` | `bool` |  | Role can update system catalogs directly. (Even a superuser cannot do this unless this column is true)
`rolcanlogin` | `bool` |  | Role can log in. That is, this role can be given as the initial session authorization identifier
`rolreplication` | `bool` |  | Role is a replication role. That is, this role can initiate streaming replication (see Section 25.2.5) and set/unset the system backup mode using `pg_start_backup` and `pg_stop_backup`
`rolconnlimit` | `int4` |  | For roles that can log in, this sets maximum number of concurrent connections this role can make. -1 means no limit.
`rolpassword` | `text` |  | Not the password (always reads as `********`)
`rolvaliduntil` | `timestamptz` |  | Password expiry time (only used for password authentication); null if no expiration
`rolconfig` | `text[]` |  | Role-specific defaults for run-time configuration variables
`oid` | `oid` | ``pg_authid`.oid` | ID of role

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