Fixed #34255 -- Made PostgreSQL backend use client-side parameters binding with psycopg version 3.

Thanks Guillaume Andreu Sabater for the report.

Co-authored-by: Florian Apolloner <apollo13@users.noreply.github.com>

docs/ref/databases.txt

@@ -117,9 +117,6 @@ PostgreSQL notes
 Django supports PostgreSQL 12 and higher. `psycopg`_ 3.1.8+ or `psycopg2`_
 2.8.4+ is required, though the latest `psycopg`_ 3.1.8+ is recommended.
 
-.. _psycopg: https://www.psycopg.org/psycopg3/
-.. _psycopg2: https://www.psycopg.org/
-
 .. note::
 
     Support for ``psycopg2`` is likely to be deprecated and removed at some
@@ -251,6 +248,31 @@ database configuration in :setting:`DATABASES`::
         },
     }
 
+.. _database-server-side-parameters-binding:
+
+Server-side parameters binding
+------------------------------
+
+.. versionadded:: 4.2
+
+With `psycopg`_ 3.1.8+, Django defaults to the :ref:`client-side binding
+cursors <psycopg:client-side-binding-cursors>`. If you want to use the
+:ref:`server-side binding <psycopg:server-side-binding>` set it in the
+:setting:`OPTIONS` part of your database configuration in
+:setting:`DATABASES`::
+
+    DATABASES = {
+        "default": {
+            "ENGINE": "django.db.backends.postgresql",
+            # ...
+            "OPTIONS": {
+                "server_side_binding": True,
+            },
+        },
+    }
+
+This option is ignored with ``psycopg2``.
+
 Indexes for ``varchar`` and ``text`` columns
 --------------------------------------------
 
@@ -373,6 +395,9 @@ non-durable <https://www.postgresql.org/docs/current/non-durability.html>`_.
     a development machine where you can easily restore the entire contents of
     all databases in the cluster.
 
+.. _psycopg: https://www.psycopg.org/psycopg3/
+.. _psycopg2: https://www.psycopg.org/
+
 .. _mariadb-notes:
 
 MariaDB notes

docs/releases/4.2.txt

@@ -254,6 +254,10 @@ Database backends
 * The new ``"assume_role"`` option is now supported in :setting:`OPTIONS` on
   PostgreSQL to allow specifying the :ref:`session role <database-role>`.
 
+* The new ``"server_side_binding"`` option is now supported in
+  :setting:`OPTIONS` on PostgreSQL with ``psycopg`` 3.1.8+ to allow using
+  :ref:`server-side binding cursors <database-server-side-parameters-binding>`.
+
 Decorators
 ~~~~~~~~~~