From 5a0f480e8ebf26be8dd84ca76dd9217bb7eea860 Mon Sep 17 00:00:00 2001
From: Laurenz Albe <laurenz.albe@cybertec.at>
Date: Mon, 4 Dec 2023 21:07:19 +0100
Subject: [PATCH] Doc: Fix omission in partitioning limitations

UNIQUE and PRIMARY KEY constraints can be created on ONLY the
partitioned table.  We already had an example demonstrating that,
but forgot to mention it in the documentation of the limits of
partitioning.

Author: Laurenz Albe
Discussion: https://postgr.es/m/167299368731.659.16130012959616771853@wrigleys.postgresql.org
---
 doc/src/sgml/ddl.sgml | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml
index 4490e82aa5..922766ef1c 100644
--- a/doc/src/sgml/ddl.sgml
+++ b/doc/src/sgml/ddl.sgml
@@ -4341,7 +4341,9 @@ ALTER INDEX measurement_city_id_logdate_key
         Using <literal>ONLY</literal> to add or drop a constraint on only
         the partitioned table is supported as long as there are no
         partitions.  Once partitions exist, using <literal>ONLY</literal>
-        will result in an error.  Instead, constraints on the partitions
+        will result in an error (unless you use <literal>ONLY</literal> to
+        create <literal>UNIQUE</literal> and <literal>PRIMARY KEY</literal>
+        constraints as shown above).  Instead, constraints on the partitions
         themselves can be added and (if they are not present in the parent
         table) dropped.
        </para>
-- 
2.43.0

