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 MogDB, 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	Specifies the name of a role.
rolsuper	Boolean	Whether the role is the initial system administrator with the highest permission
rolinherit	Boolean	Whether the role automatically inherits permissions of roles of which it is a member
rolcreaterole	Boolean	Whether the role can create more roles
rolcreatedb	Boolean	Whether the role can create databases
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.
rolcanlogin	Boolean	Whether the role can log in (whether this role can be given as the initial session authorization identifier)
rolreplication	Boolean	Indicates that the role is a replicated one (an adaptation syntax and no actual meaning).
rolauditadmin	Boolean	Indicates that the role is an audit user.
rolsystemadmin	Boolean	Username of the administrator
rolconnlimit	integer	Maximum number of concurrent connections that this role can make (valid for roles that can log in) The value -1 means 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
rolparentid	oid	OID of a group user to which the user belongs
roltabspace	text	Maximum size of a user data table
rolkind	char	Special user types, including private users and common users
rolnodegroup	oid	Unsupported currently
roltempspace	text	Storage space of the user temporary table
rolspillspace	text	Maximum size of data that can be written to disks when a user executes a job
rolexcpdata	text	Query rules that can be set by users (reserved)