Need to reset local buffer pin counts, not only shared buffer pins,

before we attempt any file deletions in ShutdownPostgres.  Per Tatsuo.

src/backend/storage/buffer/localbuf.c

@@ -9,7 +9,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/storage/buffer/localbuf.c,v 1.63 2005/03/04 20:21:06 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/storage/buffer/localbuf.c,v 1.64 2005/03/18 16:16:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -259,3 +259,17 @@ AtEOXact_LocalBuffers(bool isCommit)
 	}
 #endif
 }
+
+/*
+ * AtProcExit_LocalBuffers - ensure we have dropped pins during backend exit.
+ *
+ * This is just like AtProcExit_Buffers, but for local buffers.  We have
+ * to drop pins to ensure that any attempt to drop temp files doesn't
+ * fail in DropRelFileNodeBuffers.
+ */
+void
+AtProcExit_LocalBuffers(void)
+{
+	/* just zero the refcounts ... */
+	MemSet(LocalRefCount, 0, NLocBuffer * sizeof(*LocalRefCount));
+}

src/backend/utils/init/postinit.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/init/postinit.c,v 1.142 2005/03/18 05:24:13 tgl Exp $
+ *	  $PostgreSQL: pgsql/src/backend/utils/init/postinit.c,v 1.143 2005/03/18 16:16:09 tgl Exp $
  *
  *
  *-------------------------------------------------------------------------
@@ -515,6 +515,7 @@ ShutdownPostgres(int code, Datum arg)
 	 */
 	LWLockReleaseAll();
 	AtProcExit_Buffers();
+	AtProcExit_LocalBuffers();
 
 	/*
 	 * In case a transaction is open, delete any files it created.	This

src/include/storage/bufmgr.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/storage/bufmgr.h,v 1.90 2005/03/04 20:21:07 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/storage/bufmgr.h,v 1.91 2005/03/18 16:16:09 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -158,6 +158,7 @@ extern void	BufferSync(void);
 extern void BgBufferSync(void);
 
 extern void InitLocalBuffer(void);
+extern void AtProcExit_LocalBuffers(void);
 
 /* in freelist.c */
 extern void StrategyHintVacuum(bool vacuum_active);