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.

column	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 may create more roles
rolcreatedb	bool		Role may create databases
rolcatupdate	bool		Role may update system catalogs directly. (Even a superuser may not do this unless this column is true.)
rolcanlogin	bool		Role may log in. That is, this role can be given as the initial session authorization identifier
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[]		Session defaults for run-time configuration variables
rolresqueue	oid	pg_resqueue.oid	Object ID of the resource queue this role is assigned to.
oid	oid	pg_authid.oid	Object ID of role
rolcreaterextgpfd	bool		Role may create readable external tables that use the gpfdist protocol.
rolcreaterexthttp	bool		Role may create readable external tables that use the http protocol.
rolcreatewextgpfd	bool		Role may create writable external tables that use the gpfdist protocol.
rolcreaterexthdfs	bool		Role may create readable external tables that use the gphdfs protocol (deprecated).
rolcreatewexthdfs	bool		Role may create writable external tables that use the gphdfs protocol (deprecated).
rolresgroup	oid	pg_resgroup.oid	Object ID of the resource group to which this role is assigned.

Parent topic: System Catalogs Definitions