Added note about pgv_stats()

Artur Zakirov · Artur Zakirov · commit e45c6eb4f539 · 2016-05-25T11:47:56.000+03:00
diff --git a/contrib/pg_variables/README.md b/contrib/pg_variables/README.md
@@ -93,6 +93,8 @@ Function | Returns
 `pgv_list()` | `table(package text, name text)`
 `pgv_stats()` | `table(package text, used_memory bigint)`
 
+Note that **pgv_stats()** works only with the PostgreSQL 9.6 and newer.
+
 ## Examples
 
 It is easy to use functions to work with scalar variables:
diff --git a/doc/src/sgml/pg_variables.sgml b/doc/src/sgml/pg_variables.sgml
@@ -388,6 +388,10 @@
           </tbody>
         </tgroup>
       </informaltable>
+      <para>
+        Note that <literal>pgv_stats()</literal> works only with the
+        PostgreSQL 9.6 and newer.
+      </para>
     </sect3>
   </sect2>
   <sect2 id="pg-variables-examples">
