Repair possible failure to update hint bits back to disk, per

http://archives.postgresql.org/pgsql-hackers/2004-10/msg00464.php.
I plan a more permanent fix in HEAD, but for the back branches it seems
best to just touch the places that actually have a problem.

contrib/pgstattuple/pgstattuple.c

@@ -1,5 +1,5 @@
 /*
- * $Header: /cvsroot/pgsql/contrib/pgstattuple/pgstattuple.c,v 1.12 2003/08/04 00:43:11 momjian Exp $
+ * $Header: /cvsroot/pgsql/contrib/pgstattuple/pgstattuple.c,v 1.12.4.1 2004/10/13 22:22:00 tgl Exp $
  *
  * Copyright (c) 2001,2002	Tatsuo Ishii
  *
@@ -137,6 +137,9 @@ pgstattuple_real(Relation rel)
 	/* scan the relation */
 	while ((tuple = heap_getnext(scan, ForwardScanDirection)) != NULL)
 	{
+		uint16		sv_infomask;
+
+		sv_infomask = tuple->t_data->t_infomask;
 		if (HeapTupleSatisfiesNow(tuple->t_data))
 		{
 			tuple_len += tuple->t_len;
@@ -147,6 +150,8 @@ pgstattuple_real(Relation rel)
 			dead_tuple_len += tuple->t_len;
 			dead_tuple_count++;
 		}
+		if (sv_infomask != tuple->t_data->t_infomask)
+			SetBufferCommitInfoNeedsSave(scan->rs_cbuf);
 
 		/*
 		 * To avoid physically reading the table twice, try to do the

src/backend/access/heap/heapam.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.157 2003/10/01 21:30:52 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.157.2.1 2004/10/13 22:22:02 tgl Exp $
  *
  *
  * INTERFACE ROUTINES
@@ -1230,6 +1230,7 @@ heap_delete(Relation relation, ItemPointer tid,
 	PageHeader	dp;
 	Buffer		buffer;
 	int			result;
+	uint16		sv_infomask;
 
 	Assert(ItemPointerIsValid(tid));
 
@@ -1249,7 +1250,10 @@ heap_delete(Relation relation, ItemPointer tid,
 	tp.t_tableOid = relation->rd_id;
 
 l1:
+	sv_infomask = tp.t_data->t_infomask;
 	result = HeapTupleSatisfiesUpdate(tp.t_data, cid);
+	if (sv_infomask != tp.t_data->t_infomask)
+		SetBufferCommitInfoNeedsSave(buffer);
 
 	if (result == HeapTupleInvisible)
 	{
@@ -1266,7 +1270,7 @@ l1:
 		XactLockTableWait(xwait);
 
 		LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
-		if (TransactionIdDidAbort(xwait))
+		if (!TransactionIdDidCommit(xwait))
 			goto l1;
 
 		/*
@@ -1291,8 +1295,11 @@ l1:
 	if (crosscheck != SnapshotAny && result == HeapTupleMayBeUpdated)
 	{
 		/* Perform additional check for serializable RI updates */
+		sv_infomask = tp.t_data->t_infomask;
 		if (!HeapTupleSatisfiesSnapshot(tp.t_data, crosscheck))
 			result = HeapTupleUpdated;
+		if (sv_infomask != tp.t_data->t_infomask)
+			SetBufferCommitInfoNeedsSave(buffer);
 	}
 
 	if (result != HeapTupleMayBeUpdated)
@@ -1455,6 +1462,7 @@ heap_update(Relation relation, ItemPointer otid, HeapTuple newtup,
 	Size		newtupsize,
 				pagefree;
 	int			result;
+	uint16		sv_infomask;
 
 	Assert(ItemPointerIsValid(otid));
 
@@ -1479,7 +1487,10 @@ heap_update(Relation relation, ItemPointer otid, HeapTuple newtup,
 	 */
 
 l2:
+	sv_infomask = oldtup.t_data->t_infomask;
 	result = HeapTupleSatisfiesUpdate(oldtup.t_data, cid);
+	if (sv_infomask != oldtup.t_data->t_infomask)
+		SetBufferCommitInfoNeedsSave(buffer);
 
 	if (result == HeapTupleInvisible)
 	{
@@ -1496,7 +1507,7 @@ l2:
 		XactLockTableWait(xwait);
 
 		LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
-		if (TransactionIdDidAbort(xwait))
+		if (!TransactionIdDidCommit(xwait))
 			goto l2;
 
 		/*
@@ -1521,8 +1532,11 @@ l2:
 	if (crosscheck != SnapshotAny && result == HeapTupleMayBeUpdated)
 	{
 		/* Perform additional check for serializable RI updates */
+		sv_infomask = oldtup.t_data->t_infomask;
 		if (!HeapTupleSatisfiesSnapshot(oldtup.t_data, crosscheck))
 			result = HeapTupleUpdated;
+		if (sv_infomask != oldtup.t_data->t_infomask)
+			SetBufferCommitInfoNeedsSave(buffer);
 	}
 
 	if (result != HeapTupleMayBeUpdated)
@@ -1789,6 +1803,7 @@ heap_mark4update(Relation relation, HeapTuple tuple, Buffer *buffer,
 	ItemId		lp;
 	PageHeader	dp;
 	int			result;
+	uint16		sv_infomask;
 
 	*buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(tid));
 
@@ -1804,7 +1819,10 @@ heap_mark4update(Relation relation, HeapTuple tuple, Buffer *buffer,
 	tuple->t_len = ItemIdGetLength(lp);
 
 l3:
+	sv_infomask = tuple->t_data->t_infomask;
 	result = HeapTupleSatisfiesUpdate(tuple->t_data, cid);
+	if (sv_infomask != tuple->t_data->t_infomask)
+		SetBufferCommitInfoNeedsSave(*buffer);
 
 	if (result == HeapTupleInvisible)
 	{
@@ -1821,7 +1839,7 @@ l3:
 		XactLockTableWait(xwait);
 
 		LockBuffer(*buffer, BUFFER_LOCK_EXCLUSIVE);
-		if (TransactionIdDidAbort(xwait))
+		if (!TransactionIdDidCommit(xwait))
 			goto l3;
 
 		/*

src/backend/utils/adt/ri_triggers.c

@@ -17,7 +17,7 @@
  *
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  *
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.63 2003/10/31 03:58:20 wieck Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/ri_triggers.c,v 1.63.2.1 2004/10/13 22:22:03 tgl Exp $
  *
  * ----------
  */
@@ -223,6 +223,9 @@ RI_FKey_check(PG_FUNCTION_ARGS)
 	 * We should not even consider checking the row if it is no longer
 	 * valid since it was either deleted (doesn't matter) or updated (in
 	 * which case it'll be checked with its final values).
+	 *
+	 * Note: we need not SetBufferCommitInfoNeedsSave() here since the
+	 * new tuple's commit state can't possibly change.
 	 */
 	if (new_row)
 	{