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><A
NAME="CATALOG-PG-SHADOW"
>43.26. <TT
CLASS="STRUCTNAME"
>pg_shadow</TT
></A
></H1
><A
NAME="AEN51190"
></A
><P
> The catalog <TT
CLASS="STRUCTNAME"
>pg_shadow</TT
> contains information about
database users. The name stems from the fact that this table
should not be readable by the public since it contains passwords.
<A
HREF="view-pg-user.html"
><TT
CLASS="STRUCTNAME"
>pg_user</TT
></A
>
is a publicly readable view on
<TT
CLASS="STRUCTNAME"
>pg_shadow</TT
> that blanks out the password field.
</P
><P
> <A
HREF="user-manag.html"
>Chapter 17</A
> contains detailed information about user and
privilege management.
</P
><P
> Because user identities are cluster-wide,
<TT
CLASS="STRUCTNAME"
>pg_shadow</TT
>
is shared across all databases of a cluster: there is only one
copy of <TT
CLASS="STRUCTNAME"
>pg_shadow</TT
> per cluster, not
one per database.
</P
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><P
><B
>Table 43-26. <TT
CLASS="STRUCTNAME"
>pg_shadow</TT
> Columns</B
></P
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>Name</TH
><TH
>Type</TH
><TH
>References</TH
><TH
>Description</TH
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></THEAD
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><TR
><TD
><TT
CLASS="STRUCTFIELD"
>usename</TT
></TD
><TD
><TT
CLASS="TYPE"
>name</TT
></TD
><TD
> </TD
><TD
>User name</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>usesysid</TT
></TD
><TD
><TT
CLASS="TYPE"
>int4</TT
></TD
><TD
> </TD
><TD
>User id (arbitrary number used to reference this user)</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>usecreatedb</TT
></TD
><TD
><TT
CLASS="TYPE"
>bool</TT
></TD
><TD
> </TD
><TD
>User may create databases</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>usesuper</TT
></TD
><TD
><TT
CLASS="TYPE"
>bool</TT
></TD
><TD
> </TD
><TD
>User is a superuser</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>usecatupd</TT
></TD
><TD
><TT
CLASS="TYPE"
>bool</TT
></TD
><TD
> </TD
><TD
> User may update system catalogs. (Even a superuser may not do
this unless this column is true.)
</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>passwd</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
> </TD
><TD
>Password</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>valuntil</TT
></TD
><TD
><TT
CLASS="TYPE"
>abstime</TT
></TD
><TD
> </TD
><TD
>Account expiry time (only used for password authentication)</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>useconfig</TT
></TD
><TD
><TT
CLASS="TYPE"
>text[]</TT
></TD
><TD
> </TD
><TD
>Session defaults for run-time configuration variables</TD
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