From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Thu, 27 Nov 2008 00:34:49 +0000 (+0000)
Subject: Back-patch change to make DISCARD ALL release advisory locks.
X-Git-Tag: REL8_3_6~36
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b9e8986d1b7b1f49fa8097d3b20abebac9b1bc85;p=postgresql

Back-patch change to make DISCARD ALL release advisory locks.
Per discussion.
---

diff --git a/doc/src/sgml/ref/discard.sgml b/doc/src/sgml/ref/discard.sgml
index a4ca919394..9572d5ab85 100644
--- a/doc/src/sgml/ref/discard.sgml
+++ b/doc/src/sgml/ref/discard.sgml
@@ -1,5 +1,5 @@
 <!--
-$PostgreSQL: pgsql/doc/src/sgml/ref/discard.sgml,v 1.2 2007/04/26 18:00:24 neilc Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/discard.sgml,v 1.2.2.1 2008/11/27 00:34:49 tgl Exp $
 PostgreSQL documentation
 -->
 
@@ -70,15 +70,16 @@ DISCARD { ALL | PLANS | TEMPORARY | TEMP }
     <listitem>
      <para>
       Releases all temporary resources associated with the current
-      session and resets the session to its initial state. This has
-      the same effect as executing the following sequence of
-      statements:
+      session and resets the session to its initial state.
+      Currently, this has the same effect as executing the following sequence
+      of statements:
 <programlisting>
 SET SESSION AUTHORIZATION DEFAULT;
 RESET ALL;
 DEALLOCATE ALL;
 CLOSE ALL;
 UNLISTEN *;
+SELECT pg_advisory_unlock_all();
 DISCARD PLANS;
 DISCARD TEMP;
 </programlisting>
diff --git a/src/backend/commands/discard.c b/src/backend/commands/discard.c
index 65d910c320..adf663f6ee 100644
--- a/src/backend/commands/discard.c
+++ b/src/backend/commands/discard.c
@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/commands/discard.c,v 1.4 2008/01/01 19:45:49 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/backend/commands/discard.c,v 1.4.2.1 2008/11/27 00:34:49 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -19,6 +19,7 @@
 #include "commands/discard.h"
 #include "commands/prepare.h"
 #include "commands/variable.h"
+#include "storage/lock.h"
 #include "utils/plancache.h"
 #include "utils/portal.h"
 
@@ -66,6 +67,7 @@ DiscardAll(bool isTopLevel)
 	DropAllPreparedStatements();
 	PortalHashTableDeleteAll();
 	Async_UnlistenAll();
+	LockReleaseAll(USER_LOCKMETHOD, true);
 	ResetPlanCache();
 	ResetTempTableNamespace();
 }