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45.63. pg_shadow

The view pg_shadow exists for backwards compatibility: it emulates a catalog that existed in PostgreSQL before version 8.1. It shows properties of all roles that are marked as rolcanlogin in pg_authid.

The name stems from the fact that this table should not be readable by the public since it contains passwords. pg_user is a publicly readable view on pg_shadow that blanks out the password field.

Table 45-64. pg_shadow Columns

Name Type References Description
usename name pg_authid.rolname User name
usesysid oid pg_authid.oid ID of this user
usecreatedb bool   User can create databases
usesuper bool   User is a superuser
usecatupd bool   User can update system catalogs. (Even a superuser cannot do this unless this column is true.)
passwd text   Password (possibly encrypted); null if none. See pg_authid for details of how encrypted passwords are stored.
valuntil abstime   Password expiry time (only used for password authentication)
useconfig text[]   Session defaults for run-time configuration variables
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