From eb3adab5685ce5a60bcf96628244f1e2a8e0ab3b Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Sat, 21 Sep 2002 18:39:26 +0000
Subject: Provide an upgrade strategy for dump files containing functions
 declared with OPAQUE.  CREATE LANGUAGE, CREATE TRIGGER, and CREATE TYPE will
 all accept references to functions declared with OPAQUE --- but they will
 issue a NOTICE, and will modify the function entries in pg_proc to have the
 preferred type-safe argument or result types instead of OPAQUE. Per recent
 pghackers discussions.

---
 doc/src/sgml/ref/create_trigger.sgml | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

(limited to 'doc/src/sgml/ref/create_trigger.sgml')

diff --git a/doc/src/sgml/ref/create_trigger.sgml b/doc/src/sgml/ref/create_trigger.sgml
index c736dd95df..1134cd800e 100644
--- a/doc/src/sgml/ref/create_trigger.sgml
+++ b/doc/src/sgml/ref/create_trigger.sgml
@@ -1,5 +1,5 @@
 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_trigger.sgml,v 1.27 2002/08/22 00:01:40 tgl Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_trigger.sgml,v 1.28 2002/09/21 18:39:25 tgl Exp $
 PostgreSQL documentation
 -->
 
@@ -170,9 +170,10 @@ CREATE TRIGGER
   <para>
    In <productname>PostgreSQL</productname> versions before 7.3, it was
    necessary to declare trigger functions as returning the placeholder
-   type <type>opaque</>, rather than <type>trigger</>.  This is still
-   supported, but is deprecated because it is obscure and causes loss of
-   type safety.
+   type <type>opaque</>, rather than <type>trigger</>.  To support loading
+   of old dump files, <command>CREATE TRIGGER</> will accept a function
+   declared as returning <type>opaque</>, but it will issue a NOTICE and
+   change the function's declared return type to <type>trigger</>.
   </para>
 
   <para>
-- 
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