pg_authid
| PostgreSQL 9.4.21 Documentation | |||
|---|---|---|---|
| Prev | Up | Chapter 48. System Catalogs | Next |
The catalog pg_authid contains information about database authorization identifiers (roles). A role subsumes the concepts of "users" and "groups" . A user is essentially just a role with the rolcanlogin flag set. Any role (with or without rolcanlogin ) can have other roles as members; see pg_auth_members .
Since this catalog contains passwords, it must not be publicly readable. pg_roles is a publicly readable view on pg_authid that blanks out the password field.
Chapter 20 contains detailed information about user and privilege management.
Because user identities are cluster-wide, pg_authid is shared across all databases of a cluster: there is only one copy of pg_authid per cluster, not one per database.
Table 48-8. pg_authid Columns
| Name | Type | Description |
|---|---|---|
| oid | oid | Row identifier (hidden attribute; must be explicitly selected) |
| 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 | Password (possibly encrypted); null if none. If the password is encrypted, this column will begin with the string md5 followed by a 32-character hexadecimal MD5 hash. The MD5 hash will be of the user's password concatenated to their user name. For example, if user joe has password xyzzy , PostgreSQL will store the md5 hash of xyzzyjoe . A password that does not follow that format is assumed to be unencrypted. |
| rolvaliduntil | timestamptz | Password expiry time (only used for password authentication); null if no expiration |