Create a "relation mapping" infrastructure to support changing the relfilenodes

of shared or nailed system catalogs.  This has two key benefits:

* The new CLUSTER-based VACUUM FULL can be applied safely to all catalogs.

* We no longer have to use an unsafe reindex-in-place approach for reindexing
  shared catalogs.

CLUSTER on nailed catalogs now works too, although I left it disabled on
shared catalogs because the resulting pg_index.indisclustered update would
only be visible in one database.

Since reindexing shared system catalogs is now fully transactional and
crash-safe, the former special cases in REINDEX behavior have been removed;
shared catalogs are treated the same as non-shared.

This commit does not do anything about the recently-discussed problem of
deadlocks between VACUUM FULL/CLUSTER on a system catalog and other
concurrent queries; will address that in a separate patch.  As a stopgap,
parallel_schedule has been tweaked to run vacuum.sql by itself, to avoid
such failures during the regression tests.

1 files changed, 1 insertions, 5 deletions

diff --git a/src/include/miscadmin.h b/src/include/miscadmin.h
index f47106f6cce..2face3a3bdb 100644
--- a/src/include/miscadmin.h
+++ b/src/include/miscadmin.h
@@ -13,7 +13,7 @@
  * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.217 2010/01/02 16:58:00 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.218 2010/02/07 20:48:13 tgl Exp $
  *
  * NOTES
  *	  some of the information in this file should be moved to other files.
@@ -347,10 +347,6 @@ extern PGDLLIMPORT bool process_shared_preload_libraries_in_progress;
 extern char *shared_preload_libraries_string;
 extern char *local_preload_libraries_string;
 
-extern void SetReindexProcessing(Oid heapOid, Oid indexOid);
-extern void ResetReindexProcessing(void);
-extern bool ReindexIsProcessingHeap(Oid heapOid);
-extern bool ReindexIsProcessingIndex(Oid indexOid);
 extern void CreateDataDirLockFile(bool amPostmaster);
 extern void CreateSocketLockFile(const char *socketfile, bool amPostmaster);
 extern void TouchSocketLockFile(void);