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<!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>22.4. Dropping Roles</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 Vsnapshot" /><link rel="prev" href="role-membership.html" title="22.3. Role Membership" /><link rel="next" href="predefined-roles.html" title="22.5. Predefined Roles" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">22.4. Dropping Roles</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="role-membership.html" title="22.3. Role Membership">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="user-manag.html" title="Chapter 22. Database Roles">Up</a></td><th width="60%" align="center">Chapter 22. Database Roles</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 16.3 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="predefined-roles.html" title="22.5. Predefined Roles">Next</a></td></tr></table><hr /></div><div class="sect1" id="ROLE-REMOVAL"><div class="titlepage"><div><div><h2 class="title" style="clear: both">22.4. Dropping Roles <a href="#ROLE-REMOVAL" class="id_link">#</a></h2></div></div></div><p>
Because roles can own database objects and can hold privileges
to access other objects, dropping a role is often not just a matter of a
quick <a class="link" href="sql-droprole.html" title="DROP ROLE"><code class="command">DROP ROLE</code></a>. Any objects owned by the role must
first be dropped or reassigned to other owners; and any permissions
granted to the role must be revoked.
</p><p>
Ownership of objects can be transferred one at a time
using <code class="command">ALTER</code> commands, for example:
</p><pre class="programlisting">
ALTER TABLE bobs_table OWNER TO alice;
</pre><p>
Alternatively, the <a class="link" href="sql-reassign-owned.html" title="REASSIGN OWNED"><code class="command">REASSIGN OWNED</code></a> command can be
used to reassign ownership of all objects owned by the role-to-be-dropped
to a single other role. Because <code class="command">REASSIGN OWNED</code> cannot access
objects in other databases, it is necessary to run it in each database
that contains objects owned by the role. (Note that the first
such <code class="command">REASSIGN OWNED</code> will change the ownership of any
shared-across-databases objects, that is databases or tablespaces, that
are owned by the role-to-be-dropped.)
</p><p>
Once any valuable objects have been transferred to new owners, any
remaining objects owned by the role-to-be-dropped can be dropped with
the <a class="link" href="sql-drop-owned.html" title="DROP OWNED"><code class="command">DROP OWNED</code></a> command. Again, this command cannot
access objects in other databases, so it is necessary to run it in each
database that contains objects owned by the role. Also, <code class="command">DROP
OWNED</code> will not drop entire databases or tablespaces, so it is
necessary to do that manually if the role owns any databases or
tablespaces that have not been transferred to new owners.
</p><p>
<code class="command">DROP OWNED</code> also takes care of removing any privileges granted
to the target role for objects that do not belong to it.
Because <code class="command">REASSIGN OWNED</code> does not touch such objects, it's
typically necessary to run both <code class="command">REASSIGN OWNED</code>
and <code class="command">DROP OWNED</code> (in that order!) to fully remove the
dependencies of a role to be dropped.
</p><p>
In short then, the most general recipe for removing a role that has been
used to own objects is:
</p><pre class="programlisting">
REASSIGN OWNED BY doomed_role TO successor_role;
DROP OWNED BY doomed_role;
-- repeat the above commands in each database of the cluster
DROP ROLE doomed_role;
</pre><p>
When not all owned objects are to be transferred to the same successor
owner, it's best to handle the exceptions manually and then perform
the above steps to mop up.
</p><p>
If <code class="command">DROP ROLE</code> is attempted while dependent objects still
remain, it will issue messages identifying which objects need to be
reassigned or dropped.
</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="role-membership.html" title="22.3. Role Membership">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="user-manag.html" title="Chapter 22. Database Roles">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="predefined-roles.html" title="22.5. Predefined Roles">Next</a></td></tr><tr><td width="40%" align="left" valign="top">22.3. Role Membership </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 16.3 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 22.5. Predefined Roles</td></tr></table></div></body></html>
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