54.25. pg_shadow

54.25. `pg_shadow`
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## 54.25. `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 54.25. `pg_shadow` Columns

Column Type Description
`usename` `name` (references `pg_authid`.`rolname`) User name
`usesysid` `oid` (references `pg_authid`.`oid`) ID of this user
`usecreatedb` `bool` User can create databases
`usesuper` `bool` User is a superuser
`userepl` `bool` User can initiate streaming replication and put the system in and out of backup mode.
`usebypassrls` `bool` User bypasses every row-level security policy, see Section 5.8 for more information.
`passwd` `text` Encrypted password; null if none. See `pg_authid` for details of how encrypted passwords are stored.
`valuntil` `timestamptz` Password expiry time (only used for password authentication)
`useconfig` `text[]` Session defaults for run-time configuration variables

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