Add "Compatibility" section to ALTER EXTENSION reference page

Almost all other pages have one; this one must have been forgotten.

diff --git a/doc/src/sgml/ref/alter_extension.sgml b/doc/src/sgml/ref/alter_extension.sgml
index 5341f53d06f5e8a5ff8953cef09df188ca6fa102..cbe5043fef5b377dc3c6bc3ecbeab9cb2e9b88b7 100644 (file)
--- a/doc/src/sgml/ref/alter_extension.sgml
+++ b/doc/src/sgml/ref/alter_extension.sgml
@@ -291,6 +291,15 @@ ALTER EXTENSION hstore ADD FUNCTION populate_record(anyelement, hstore);
 
  
 
+ 
+  Compatibility
+
+  
+   ALTER EXTENSION is a PostgreSQL
+   extension.
+  
+ 
+
  
   See Also