From 0beef5af3a4821155251d8d445b9ba1296381645 Mon Sep 17 00:00:00 2001
From: Andrew Dunstan <andrew@dunslane.net>
Date: Fri, 17 Jul 2015 21:08:03 -0400
Subject: [PATCH] Release note compatibility item

Note that json and jsonb extraction operators no longer consider a
negative subscript to be invalid.
---
 doc/src/sgml/release-9.5.sgml | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/doc/src/sgml/release-9.5.sgml b/doc/src/sgml/release-9.5.sgml
index a1010b29b8..dff1ba9ae0 100644
--- a/doc/src/sgml/release-9.5.sgml
+++ b/doc/src/sgml/release-9.5.sgml
@@ -141,6 +141,17 @@
      </para>
     </listitem>
 
+    <listitem>
+     <para>
+      Allow <type>json</> and <type>jsonb</> extraction operators to
+      accept negative subscripts, which count from the end of JSON
+      arrays.  Historically, these operators yielded <literal>NULL</>
+      in the event of a negative subscript, because negative
+      subscripts were considered invalid.  (Peter Geoghegan, Andrew
+      Dunstan)
+     </para>
+    </listitem>
+
    </itemizedlist>
 
   </sect2>
-- 
2.40.0