Postgresql 中文操作指南
54.25. pg_shadow #
视图 pg_shadow 用于向后兼容性：它模拟 PostgreSQL 中 8.1 版本之前存在的目录。它显示 pg_authid 中标记为 rolcanlogin 的所有角色的属性。
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.
该名称源于如下事实：此表不应允许公共用户读取，因为它包含密码。 pg_user 是 pg_shadow 中一个公开可读的视图，它会将密码字段留空。
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
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 Password (possibly encrypted); 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 |