Remove old-style VACUUM FULL (which was known for a little while as

VACUUM FULL INPLACE), along with a boatload of subsidiary code and complexity.
Per discussion, the use case for this method of vacuuming is no longer large
enough to justify maintaining it; not to mention that we don't wish to invest
the work that would be needed to make it play nicely with Hot Standby.

Aside from the code directly related to old-style VACUUM FULL, this commit
removes support for certain WAL record types that could only be generated
within VACUUM FULL, redirect-pointer removal in heap_page_prune, and
nontransactional generation of cache invalidation sinval messages (the last
being the sticking point for Hot Standby).

We still have to retain all code that copes with finding HEAP_MOVED_OFF and
HEAP_MOVED_IN flag bits on existing tuples.  This can't be removed as long
as we want to support in-place update from pre-9.0 databases.

2 files changed, 4 insertions, 24 deletions

diff --git a/src/backend/access/gin/README b/src/backend/access/gin/README
index af65efcb542..cd406935e05 100644
--- a/src/backend/access/gin/README
+++ b/src/backend/access/gin/README
@@ -1,4 +1,4 @@
-$PostgreSQL: pgsql/src/backend/access/gin/README,v 1.6 2008/07/08 03:25:42 neilc Exp $
+$PostgreSQL: pgsql/src/backend/access/gin/README,v 1.7 2010/02/08 04:33:52 tgl Exp $
 
 Gin for PostgreSQL
 ==================
@@ -98,13 +98,6 @@ We appreciate any comments, help and suggestions.
   * Teach optimizer/executor that GIN is intrinsically clustered. i.e., it
     always returns ItemPointer in ascending order.
   * Tweak gincostestimate.
-  * GIN stores several ItemPointer to heap tuple, so VACUUM FULL produces
-    this warning message:
-
-     WARNING:  index "idx" contains 88395 row versions, but table contains 
-     				51812 row versions
-     HINT:  Rebuild the index with REINDEX.
-	**** Workaround added
 
 TODO
 ----
diff --git a/src/backend/access/gin/ginvacuum.c b/src/backend/access/gin/ginvacuum.c
index 014db7fb739..a13b99cdfac 100644
--- a/src/backend/access/gin/ginvacuum.c
+++ b/src/backend/access/gin/ginvacuum.c
@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *			$PostgreSQL: pgsql/src/backend/access/gin/ginvacuum.c,v 1.32 2010/01/02 16:57:33 momjian Exp $
+ *			$PostgreSQL: pgsql/src/backend/access/gin/ginvacuum.c,v 1.33 2010/02/08 04:33:52 tgl Exp $
  *-------------------------------------------------------------------------
  */
 
@@ -745,13 +745,9 @@ ginvacuumcleanup(PG_FUNCTION_ARGS)
 	stats->estimated_count = info->estimated_count;
 
 	/*
-	 * If vacuum full, we already have exclusive lock on the index. Otherwise,
-	 * need lock unless it's local to this backend.
+	 * Need lock unless it's local to this backend.
 	 */
-	if (info->vacuum_full)
-		needLock = false;
-	else
-		needLock = !RELATION_IS_LOCAL(index);
+	needLock = !RELATION_IS_LOCAL(index);
 
 	if (needLock)
 		LockRelationForExtension(index, ExclusiveLock);
@@ -785,15 +781,6 @@ ginvacuumcleanup(PG_FUNCTION_ARGS)
 	}
 	lastBlock = npages - 1;
 
-	if (info->vacuum_full && lastBlock > lastFilledBlock)
-	{
-		/* try to truncate index */
-		RelationTruncate(index, lastFilledBlock + 1);
-
-		stats->pages_removed = lastBlock - lastFilledBlock;
-		totFreePages = totFreePages - stats->pages_removed;
-	}
-
 	/* Finally, vacuum the FSM */
 	IndexFreeSpaceMapVacuum(info->index);