Baoding-FenShuaJiang
/
Green_GoodERP18_FSJ_Standard


			
				
					
						
						
							
							<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>REVOKE</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="prev" href="sql-reset.html" title="RESET" /><link rel="next" href="sql-rollback.html" title="ROLLBACK" /></head><body><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">REVOKE</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="sql-reset.html" title="RESET">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="sql-commands.html" title="SQL Commands">Up</a></td><th width="60%" align="center">SQL Commands</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 12.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-rollback.html" title="ROLLBACK">Next</a></td></tr></table><hr></hr></div><div class="refentry" id="SQL-REVOKE"><div class="titlepage"></div><a id="id-1.9.3.165.1" class="indexterm"></a><div class="refnamediv"><h2><span class="refentrytitle">REVOKE</span></h2><p>REVOKE — remove access privileges</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">
REVOKE [ GRANT OPTION FOR ]
    { { SELECT | INSERT | UPDATE | DELETE | TRUNCATE | REFERENCES | TRIGGER }
    [, ...] | ALL [ PRIVILEGES ] }
    ON { [ TABLE ] <em class="replaceable"><code>table_name</code></em> [, ...]
         | ALL TABLES IN SCHEMA <em class="replaceable"><code>schema_name</code></em> [, ...] }
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { { SELECT | INSERT | UPDATE | REFERENCES } ( <em class="replaceable"><code>column_name</code></em> [, ...] )
    [, ...] | ALL [ PRIVILEGES ] ( <em class="replaceable"><code>column_name</code></em> [, ...] ) }
    ON [ TABLE ] <em class="replaceable"><code>table_name</code></em> [, ...]
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { { USAGE | SELECT | UPDATE }
    [, ...] | ALL [ PRIVILEGES ] }
    ON { SEQUENCE <em class="replaceable"><code>sequence_name</code></em> [, ...]
         | ALL SEQUENCES IN SCHEMA <em class="replaceable"><code>schema_name</code></em> [, ...] }
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { { CREATE | CONNECT | TEMPORARY | TEMP } [, ...] | ALL [ PRIVILEGES ] }
    ON DATABASE <em class="replaceable"><code>database_name</code></em> [, ...]
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { USAGE | ALL [ PRIVILEGES ] }
    ON DOMAIN <em class="replaceable"><code>domain_name</code></em> [, ...]
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { USAGE | ALL [ PRIVILEGES ] }
    ON FOREIGN DATA WRAPPER <em class="replaceable"><code>fdw_name</code></em> [, ...]
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { USAGE | ALL [ PRIVILEGES ] }
    ON FOREIGN SERVER <em class="replaceable"><code>server_name</code></em> [, ...]
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { EXECUTE | ALL [ PRIVILEGES ] }
    ON { { FUNCTION | PROCEDURE | ROUTINE } <em class="replaceable"><code>function_name</code></em> [ ( [ [ <em class="replaceable"><code>argmode</code></em> ] [ <em class="replaceable"><code>arg_name</code></em> ] <em class="replaceable"><code>arg_type</code></em> [, ...] ] ) ] [, ...]
         | ALL { FUNCTIONS | PROCEDURES | ROUTINES } IN SCHEMA <em class="replaceable"><code>schema_name</code></em> [, ...] }
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { USAGE | ALL [ PRIVILEGES ] }
    ON LANGUAGE <em class="replaceable"><code>lang_name</code></em> [, ...]
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { { SELECT | UPDATE } [, ...] | ALL [ PRIVILEGES ] }
    ON LARGE OBJECT <em class="replaceable"><code>loid</code></em> [, ...]
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { { CREATE | USAGE } [, ...] | ALL [ PRIVILEGES ] }
    ON SCHEMA <em class="replaceable"><code>schema_name</code></em> [, ...]
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { CREATE | ALL [ PRIVILEGES ] }
    ON TABLESPACE <em class="replaceable"><code>tablespace_name</code></em> [, ...]
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ GRANT OPTION FOR ]
    { USAGE | ALL [ PRIVILEGES ] }
    ON TYPE <em class="replaceable"><code>type_name</code></em> [, ...]
    FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ CASCADE | RESTRICT ]

REVOKE [ ADMIN OPTION FOR ]
    <em class="replaceable"><code>role_name</code></em> [, ...] FROM <em class="replaceable"><code>role_specification</code></em> [, ...]
    [ GRANTED BY <em class="replaceable"><code>role_specification</code></em> ]
    [ CASCADE | RESTRICT ]

<span class="phrase">where <em class="replaceable"><code>role_specification</code></em> can be:</span>

    [ GROUP ] <em class="replaceable"><code>role_name</code></em>
  | PUBLIC
  | CURRENT_USER
  | SESSION_USER
</pre></div><div class="refsect1" id="SQL-REVOKE-DESCRIPTION"><h2>Description</h2><p>
   The <code class="command">REVOKE</code> command revokes previously granted
   privileges from one or more roles.  The key word
   <code class="literal">PUBLIC</code> refers to the implicitly defined group of
   all roles.
  </p><p>
   See the description of the <a class="xref" href="sql-grant.html" title="GRANT"><span class="refentrytitle">GRANT</span></a> command for
   the meaning of the privilege types.
  </p><p>
   Note that any particular role will have the sum
   of privileges granted directly to it, privileges granted to any role it
   is presently a member of, and privileges granted to
   <code class="literal">PUBLIC</code>.  Thus, for example, revoking <code class="literal">SELECT</code> privilege
   from <code class="literal">PUBLIC</code> does not necessarily mean that all roles
   have lost <code class="literal">SELECT</code> privilege on the object: those who have it granted
   directly or via another role will still have it.  Similarly, revoking
   <code class="literal">SELECT</code> from a user might not prevent that user from using
   <code class="literal">SELECT</code> if <code class="literal">PUBLIC</code> or another membership
   role still has <code class="literal">SELECT</code> rights.
  </p><p>
   If <code class="literal">GRANT OPTION FOR</code> is specified, only the grant
   option for the privilege is revoked, not the privilege itself.
   Otherwise, both the privilege and the grant option are revoked.
  </p><p>
   If a user holds a privilege with grant option and has granted it to
   other users then the privileges held by those other users are
   called dependent privileges. If the privilege or the grant option
   held by the first user is being revoked and dependent privileges
   exist, those dependent privileges are also revoked if
   <code class="literal">CASCADE</code> is specified; if it is not, the revoke action
   will fail.  This recursive revocation only affects privileges that
   were granted through a chain of users that is traceable to the user
   that is the subject of this <code class="literal">REVOKE</code> command.
   Thus, the affected users might effectively keep the privilege if it
   was also granted through other users.
  </p><p>
   When revoking privileges on a table, the corresponding column privileges
   (if any) are automatically revoked on each column of the table, as well.
   On the other hand, if a role has been granted privileges on a table, then
   revoking the same privileges from individual columns will have no effect.
  </p><p>
   When revoking membership in a role, <code class="literal">GRANT OPTION</code> is instead
   called <code class="literal">ADMIN OPTION</code>, but the behavior is similar.
   This form of the command also allows a <code class="literal">GRANTED BY</code>
   option, but that option is currently ignored (except for checking
   the existence of the named role).
   Note also that this form of the command does not
   allow the noise word <code class="literal">GROUP</code>
   in <em class="replaceable"><code>role_specification</code></em>.
  </p></div><div class="refsect1" id="SQL-REVOKE-NOTES"><h2>Notes</h2><p>
   A user can only revoke privileges that were granted directly by
   that user.  If, for example, user A has granted a privilege with
   grant option to user B, and user B has in turn granted it to user
   C, then user A cannot revoke the privilege directly from C.
   Instead, user A could revoke the grant option from user B and use
   the <code class="literal">CASCADE</code> option so that the privilege is
   in turn revoked from user C.  For another example, if both A and B
   have granted the same privilege to C, A can revoke their own grant
   but not B's grant, so C will still effectively have the privilege.
  </p><p>
    When a non-owner of an object attempts to <code class="command">REVOKE</code> privileges
    on the object, the command will fail outright if the user has no
    privileges whatsoever on the object.  As long as some privilege is
    available, the command will proceed, but it will revoke only those
    privileges for which the user has grant options.  The <code class="command">REVOKE ALL
    PRIVILEGES</code> forms will issue a warning message if no grant options are
    held, while the other forms will issue a warning if grant options for
    any of the privileges specifically named in the command are not held.
    (In principle these statements apply to the object owner as well, but
    since the owner is always treated as holding all grant options, the
    cases can never occur.)
   </p><p>
    If a superuser chooses to issue a <code class="command">GRANT</code> or <code class="command">REVOKE</code>
    command, the command is performed as though it were issued by the
    owner of the affected object.  Since all privileges ultimately come
    from the object owner (possibly indirectly via chains of grant options),
    it is possible for a superuser to revoke all privileges, but this might
    require use of <code class="literal">CASCADE</code> as stated above.
   </p><p>
    <code class="command">REVOKE</code> can also be done by a role
    that is not the owner of the affected object, but is a member of the role
    that owns the object, or is a member of a role that holds privileges
    <code class="literal">WITH GRANT OPTION</code> on the object.  In this case the
    command is performed as though it were issued by the containing role that
    actually owns the object or holds the privileges
    <code class="literal">WITH GRANT OPTION</code>.  For example, if table
    <code class="literal">t1</code> is owned by role <code class="literal">g1</code>, of which role
    <code class="literal">u1</code> is a member, then <code class="literal">u1</code> can revoke privileges
    on <code class="literal">t1</code> that are recorded as being granted by <code class="literal">g1</code>.
    This would include grants made by <code class="literal">u1</code> as well as by other
    members of role <code class="literal">g1</code>.
   </p><p>
    If the role executing <code class="command">REVOKE</code> holds privileges
    indirectly via more than one role membership path, it is unspecified
    which containing role will be used to perform the command.  In such cases
    it is best practice to use <code class="command">SET ROLE</code> to become the specific
    role you want to do the <code class="command">REVOKE</code> as.  Failure to do so might
    lead to revoking privileges other than the ones you intended, or not
    revoking anything at all.
   </p><p>
    See <a class="xref" href="ddl-priv.html" title="5.7. Privileges">Section 5.7</a> for more information about specific
    privilege types, as well as how to inspect objects' privileges.
   </p></div><div class="refsect1" id="SQL-REVOKE-EXAMPLES"><h2>Examples</h2><p>
   Revoke insert privilege for the public on table
   <code class="literal">films</code>:

</p><pre class="programlisting">
REVOKE INSERT ON films FROM PUBLIC;
</pre><p>
  </p><p>
   Revoke all privileges from user <code class="literal">manuel</code> on view
   <code class="literal">kinds</code>:

</p><pre class="programlisting">
REVOKE ALL PRIVILEGES ON kinds FROM manuel;
</pre><p>

   Note that this actually means <span class="quote">“<span class="quote">revoke all privileges that I
   granted</span>”</span>.
  </p><p>
   Revoke membership in role <code class="literal">admins</code> from user <code class="literal">joe</code>:

</p><pre class="programlisting">
REVOKE admins FROM joe;
</pre></div><div class="refsect1" id="SQL-REVOKE-COMPATIBILITY"><h2>Compatibility</h2><p>
    The compatibility notes of the <a class="xref" href="sql-grant.html" title="GRANT"><span class="refentrytitle">GRANT</span></a> command
    apply analogously to <code class="command">REVOKE</code>.
    The keyword <code class="literal">RESTRICT</code> or <code class="literal">CASCADE</code>
    is required according to the standard, but <span class="productname">PostgreSQL</span>
    assumes <code class="literal">RESTRICT</code> by default.
   </p></div><div class="refsect1" id="id-1.9.3.165.9"><h2>See Also</h2><span class="simplelist"><a class="xref" href="sql-grant.html" title="GRANT"><span class="refentrytitle">GRANT</span></a>, <a class="xref" href="sql-alterdefaultprivileges.html" title="ALTER DEFAULT PRIVILEGES"><span class="refentrytitle">ALTER DEFAULT PRIVILEGES</span></a></span></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="sql-reset.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="sql-commands.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-rollback.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">RESET </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> ROLLBACK</td></tr></table></div></body></html>