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Try to be a little bit clearer about the implications of GRANT TO PUBLIC

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and REVOKE FROM PUBLIC: the latter is not the same as 'revoke from all
users', but the ref page blurred the difference.
This commit is contained in:
Tom Lane 2001-11-19 19:03:56 +00:00
parent 6f6567812e
commit ec62ba9361
2 changed files with 34 additions and 12 deletions
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24
doc/src/sgml/ref/grant.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/grant.sgml,v 1.15 2001/11/18 20:35:02 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/grant.sgml,v 1.16 2001/11/19 19:03:56 tgl Exp $
Postgres documentation
-->
@ -27,18 +27,30 @@ GRANT { { SELECT | INSERT | UPDATE | DELETE | RULE | REFERENCES | TRIGGER } [,..
<para>
The <command>GRANT</command> command gives specific permissions on
an object (table, view, sequence) to a user or a group of users.
The special key word <literal>PUBLIC</literal> indicates that the
an object (table, view, sequence) to one or more users or groups of users.
These permissions are added to those already granted, if any.
</para>
<para>
The key word <literal>PUBLIC</literal> indicates that the
privileges are to be granted to all users, including those that may
be created later.
be created later. <literal>PUBLIC</literal> may be thought of as an
implicitly defined group that always includes all users.
Note that any particular user will have the sum
of privileges granted directly to him, privileges granted to any group he
is presently a member of, and privileges granted to
<literal>PUBLIC</literal>.
</para>
<para>
Users other than the creator do not have any access privileges
unless the creator grants permissions, after the object is created.
to an object unless the creator grants permissions.
There is no need to grant privileges to the creator of an object,
as the creator automatically holds all privileges, and can also
drop the object.
drop the object. (The creator could, however, choose to revoke
some of his own privileges for safety. Note that the ability to
grant and revoke privileges is inherent in the creator and cannot
be lost.)
</para>
<para>

22
doc/src/sgml/ref/revoke.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/revoke.sgml,v 1.17 2001/11/18 20:35:02 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/revoke.sgml,v 1.18 2001/11/19 19:03:56 tgl Exp $
Postgres documentation
-->
@ -27,9 +27,19 @@ REVOKE { { SELECT | INSERT | UPDATE | DELETE | RULE | REFERENCES | TRIGGER } [,.
<para>
<command>REVOKE</command> allows the creator of an object to revoke
permissions granted before, from a users or a group of users. The
key word <literal>PUBLIC</literal> means to revoke this privilege
from all users.
previously granted permissions from one or more users or groups of users.
The key word <literal>PUBLIC</literal> refers to the implicitly defined
group of all users.
</para>
<para>
Note that any particular user will have the sum
of privileges granted directly to him, privileges granted to any group he
is presently a member of, and privileges granted to
<literal>PUBLIC</literal>. Thus, for example, revoking SELECT privilege
from <literal>PUBLIC</literal> does not necessarily mean that all users
have lost SELECT privilege on the object: those who have it granted
directly or via a group will still have it.
</para>
<para>
@ -52,7 +62,7 @@ REVOKE { { SELECT | INSERT | UPDATE | DELETE | RULE | REFERENCES | TRIGGER } [,.
<title>Examples</title>
<para>
Revoke insert privilege from all users on table
Revoke insert privilege for the public on table
<literal>films</literal>:
<programlisting>
@ -93,7 +103,7 @@ REVOKE [ GRANT OPTION FOR ] { SELECT | INSERT | UPDATE | DELETE | REFERENCES }
this privilege in cascade using the CASCADE keyword.
If user1 gives a privilege WITH GRANT OPTION to user2,
and user2 gives it to user3, then if user1 tries to revoke
this privilege it fails if he specify the RESTRICT
this privilege it fails if he specifies the RESTRICT
keyword.
</para>
</refsect2>