From b3fe098d330ff6a7c23019d66a600072b1d4664d Mon Sep 17 00:00:00 2001
From: Daniel Gustafsson <dgustafsson@postgresql.org>
Date: Wed, 26 Nov 2025 14:24:27 +0100
Subject: Add GUC to show EXEC_BACKEND state
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There is no straightforward way to determine if a cluster is running
in EXEC_BACKEND mode or not, which is useful for tests to know. This
adds a GUC debug_exec_backend similar to debug_assertions which will
be true when the server is running in EXEC_BACKEND mode.

Author: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de>
Reviewed-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://postgr.es/m/5F301096-921A-427D-8EC1-EBAEC2A35082@yesql.se
---
 doc/src/sgml/config.sgml | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'doc/src')

diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 07ff5873a97..737b90736bf 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -11833,6 +11833,23 @@ dynamic_library_path = '/usr/local/lib/postgresql:$libdir'
       </listitem>
      </varlistentry>
 
+     <varlistentry id="guc-debug-exec-backend" xreflabel="debug_exec_backend">
+      <term><varname>debug_exec_backend</varname> (<type>boolean</type>)
+      <indexterm>
+       <primary><varname>debug_exec_backend</varname> configuration parameter</primary>
+      </indexterm>
+      </term>
+      <listitem>
+       <para>
+        Reports whether <productname>PostgreSQL</productname> has been built
+        with <literal>EXEC_BACKEND</literal> enabled. That is the case on
+        <systemitem class="osname">Windows</systemitem> or if the
+        macro <symbol>EXEC_BACKEND</symbol> is defined
+        when <productname>PostgreSQL</productname> is built.
+       </para>
+      </listitem>
+     </varlistentry>
+
      <varlistentry id="guc-huge-pages-status" xreflabel="huge_pages_status">
       <term><varname>huge_pages_status</varname> (<type>enum</type>)
       <indexterm>
-- 
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