From f760137d441b10fea341fc1af8bb982db88c9d9f Mon Sep 17 00:00:00 2001
From: Alvaro Herrera <alvherre@alvh.no-ip.org>
Date: Thu, 6 May 2021 17:17:56 -0400
Subject: [PATCH] Document lock level used by ALTER TABLE VALIDATE CONSTRAINT

Backpatch all the way back to 9.6.

Author: Simon Riggs <simon.riggs@enterprisedb.com>
Discussion: https://postgr.es/m/CANbhV-EwxvdhHuOLdfG2ciYrHOHXV=mm6=fD5aMhqcH09Li3Tg@mail.gmail.com
---
 doc/src/sgml/ref/alter_table.sgml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/src/sgml/ref/alter_table.sgml b/doc/src/sgml/ref/alter_table.sgml
index 56e134d82a5..f509a35367c 100644
--- a/doc/src/sgml/ref/alter_table.sgml
+++ b/doc/src/sgml/ref/alter_table.sgml
@@ -369,6 +369,9 @@ ALTER TABLE ALL IN TABLESPACE <replaceable class="PARAMETER">name</replaceable>
       endterm="sql-altertable-notes-title"> below for an explanation of the
       usefulness of this command.)
      </para>
+     <para>
+      This command acquires a <literal>SHARE UPDATE EXCLUSIVE</literal> lock.
+     </para>
     </listitem>
    </varlistentry>