From: Andrew Dunstan <andrew@dunslane.net>
Date: Sat, 18 Jul 2015 01:08:03 +0000 (-0400)
Subject: Release note compatibility item
X-Git-Tag: REL9_6_BETA1~1670
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=473865048517c7808ddcf2299d054d8fe30fc6d5;p=thirdparty%2Fpostgresql.git

Release note compatibility item

Note that json and jsonb extraction operators no longer consider a
negative subscript to be invalid.
---

diff --git a/doc/src/sgml/release-9.5.sgml b/doc/src/sgml/release-9.5.sgml
index 817b973546a..0b12420aead 100644
--- a/doc/src/sgml/release-9.5.sgml
+++ b/doc/src/sgml/release-9.5.sgml
@@ -162,6 +162,17 @@
      </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>