PG_AUTHID

PG_AUTHID records information about database authentication identifiers (roles). The concept of users is contained in that of roles. A user is actually a role whose rolcanlogin has been set. Any role, whether its rolcanlogin is set or not, can use other roles as members.

For a cluster, only one PG_AUTHID exists, which is not available for every database. This system catalog is accessible only to system administrators.

**Table 1** PG_AUTHID columns
Name	Type	Description
oid	oid	Row identifier (hidden attribute, which must be specified)
rolname	name	Name of a role
rolsuper	boolean	Whether the role is the initial system administrator with the highest permission t (true): yes f (false): no
rolinherit	boolean	Whether the role automatically inherits permissions of roles of which it is a member t (true): automatically inherited f (false): not automatically inherited
rolcreaterole	boolean	Whether the role can create more roles t (true): yes f (false): no
rolcreatedb	boolean	Whether the role can create databases t (true): yes f (false): no
rolcatupdate	boolean	Whether the role can directly update system catalogs Only the initial system administrator whose usesysid is 10 has this permission. It is unavailable for other users. t (true): yes f (false): no
rolcanlogin	boolean	Whether the role can log in (whether this role can be given as the initial session authorization identifier) t (true): yes f (false): no
rolreplication	boolean	Specifies whether the role has the replication permission. t (true): yes f (false): no
rolauditadmin	boolean	Specifies whether the role has the audit administrator permission. t (true): yes f (false): no
rolsystemadmin	boolean	Specifies whether the role has the system administrator permission. t (true): yes f (false): no
rolconnlimit	integer	Maximum number of concurrent connections that this role can make (valid for roles that can log in) The value –1 indicates there is no limit.
rolpassword	text	Password (possibly encrypted) (null if no password)
rolvalidbegin	timestamp with time zone	Account validity start time (NULL if no start time)
rolvaliduntil	timestamp with time zone	Password expiry time (NULL if no expiration)
rolrespool	name	Resource pool that a user can use
roluseft	boolean	Whether the role can perform operations on foreign tables t (true): yes f (false): no
rolparentid	oid	OID of a group user to which the user belongs
roltabspace	text	Maximum size of a user data table
rolkind	"char"	Type of a user. p: permanent user n: common user
roltempspace	text	Maximum size of a user's temporary table, in KB.
rolspillspace	text	Maximum size of data that can be written to disks when a user executes a job, in KB.
rolexcpdata	text	Query rules that can be set by users (reserved)
rolmonitoradmin	boolean	Specifies whether the role has the monitor administrator permission. t (true): yes f (false): no
roloperatoradmin	boolean	Specifies whether the role has the O&M administrator permission. t (true): yes f (false): no
rolpolicyadmin	boolean	Specifies whether the role has the security policy administrator permission. t (true): yes f (false): no