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2 <!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>29.11. Security</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="logical-replication-monitoring.html" title="29.10. Monitoring" /><link rel="next" href="logical-replication-config.html" title="29.12. Configuration Settings" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">29.11. Security</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="logical-replication-monitoring.html" title="29.10. Monitoring">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="logical-replication.html" title="Chapter 29. Logical Replication">Up</a></td><th width="60%" align="center">Chapter 29. Logical Replication</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="logical-replication-config.html" title="29.12. Configuration Settings">Next</a></td></tr></table><hr /></div><div class="sect1" id="LOGICAL-REPLICATION-SECURITY"><div class="titlepage"><div><div><h2 class="title" style="clear: both">29.11. Security <a href="#LOGICAL-REPLICATION-SECURITY" class="id_link">#</a></h2></div></div></div><p>
3 The role used for the replication connection must have
4 the <code class="literal">REPLICATION</code> attribute (or be a superuser). If the
5 role lacks <code class="literal">SUPERUSER</code> and <code class="literal">BYPASSRLS</code>,
6 publisher row security policies can execute. If the role does not trust
7 all table owners, include <code class="literal">options=-crow_security=off</code> in
8 the connection string; if a table owner then adds a row security policy,
9 that setting will cause replication to halt rather than execute the policy.
10 Access for the role must be configured in <code class="filename">pg_hba.conf</code>
11 and it must have the <code class="literal">LOGIN</code> attribute.
13 In order to be able to copy the initial table data, the role used for the
14 replication connection must have the <code class="literal">SELECT</code> privilege on
15 a published table (or be a superuser).
17 To create a publication, the user must have the <code class="literal">CREATE</code>
18 privilege in the database.
20 To add tables to a publication, the user must have ownership rights on the
21 table. To add all tables in schema to a publication, the user must be a
22 superuser. To create a publication that publishes all tables or all tables in
23 schema automatically, the user must be a superuser.
25 There are currently no privileges on publications. Any subscription (that
26 is able to connect) can access any publication. Thus, if you intend to
27 hide some information from particular subscribers, such as by using row
28 filters or column lists, or by not adding the whole table to the
29 publication, be aware that other publications in the same database could
30 expose the same information. Publication privileges might be added to
31 <span class="productname">PostgreSQL</span> in the future to allow for
32 finer-grained access control.
34 To create a subscription, the user must have the privileges of
35 the <code class="literal">pg_create_subscription</code> role, as well as
36 <code class="literal">CREATE</code> privileges on the database.
38 The subscription apply process will, at a session level, run with the
39 privileges of the subscription owner. However, when performing an insert,
40 update, delete, or truncate operation on a particular table, it will switch
41 roles to the table owner and perform the operation with the table owner's
42 privileges. This means that the subscription owner needs to be able to
43 <code class="literal">SET ROLE</code> to each role that owns a replicated table.
45 If the subscription has been configured with
46 <code class="literal">run_as_owner = true</code>, then no user switching will
47 occur. Instead, all operations will be performed with the permissions
48 of the subscription owner. In this case, the subscription owner only
49 needs privileges to <code class="literal">SELECT</code>, <code class="literal">INSERT</code>,
50 <code class="literal">UPDATE</code>, and <code class="literal">DELETE</code> from the
51 target table, and does not need privileges to <code class="literal">SET ROLE</code>
52 to the table owner. However, this also means that any user who owns
53 a table into which replication is happening can execute arbitrary code with
54 the privileges of the subscription owner. For example, they could do this
55 by simply attaching a trigger to one of the tables which they own.
56 Because it is usually undesirable to allow one role to freely assume
57 the privileges of another, this option should be avoided unless user
58 security within the database is of no concern.
60 On the publisher, privileges are only checked once at the start of a
61 replication connection and are not re-checked as each change record is read.
63 On the subscriber, the subscription owner's privileges are re-checked for
64 each transaction when applied. If a worker is in the process of applying a
65 transaction when the ownership of the subscription is changed by a
66 concurrent transaction, the application of the current transaction will
67 continue under the old owner's privileges.
68 </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="logical-replication-monitoring.html" title="29.10. Monitoring">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="logical-replication.html" title="Chapter 29. Logical Replication">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="logical-replication-config.html" title="29.12. Configuration Settings">Next</a></td></tr><tr><td width="40%" align="left" valign="top">29.10. Monitoring </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 18.0 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 29.12. Configuration Settings</td></tr></table></div></body></html>