3 files changed, 10 insertions, 8 deletions
diff --git a/src/backend/access/nbtree/nbtinsert.c b/src/backend/access/nbtree/nbtinsert.c
index 1675298f73d..cbd4ec3b39e 100644
--- a/src/backend/access/nbtree/nbtinsert.c
+++ b/src/backend/access/nbtree/nbtinsert.c
@@ -2413,7 +2413,7 @@ _bt_newroot(Relation rel, Buffer lbuf, Buffer rbuf)
 	left_item = (IndexTuple) palloc(left_item_sz);
 	left_item->t_info = left_item_sz;
 	BTreeTupleSetDownLink(left_item, lbkno);
-	BTreeTupleSetNAtts(left_item, 0);
+	BTreeTupleSetNAtts(left_item, 0, false);
 
 	/*
 	 * Create downlink item for right page.  The key for it is obtained from
@@ -2571,7 +2571,7 @@ _bt_pgaddtup(Page page,
 	{
 		trunctuple = *itup;
 		trunctuple.t_info = sizeof(IndexTupleData);
-		BTreeTupleSetNAtts(&trunctuple, 0);
+		BTreeTupleSetNAtts(&trunctuple, 0, false);
 		itup = &trunctuple;
 		itemsize = sizeof(IndexTupleData);
 	}
diff --git a/src/backend/access/nbtree/nbtsort.c b/src/backend/access/nbtree/nbtsort.c
index 29a6f5ade61..9d249f7a6b6 100644
--- a/src/backend/access/nbtree/nbtsort.c
+++ b/src/backend/access/nbtree/nbtsort.c
@@ -771,7 +771,7 @@ _bt_sortaddtup(Page page,
 	{
 		trunctuple = *itup;
 		trunctuple.t_info = sizeof(IndexTupleData);
-		BTreeTupleSetNAtts(&trunctuple, 0);
+		BTreeTupleSetNAtts(&trunctuple, 0, false);
 		itup = &trunctuple;
 		itemsize = sizeof(IndexTupleData);
 	}
@@ -1045,7 +1045,7 @@ _bt_buildadd(BTWriteState *wstate, BTPageState *state, IndexTuple itup,
 		Assert(state->btps_lowkey == NULL);
 		state->btps_lowkey = palloc0(sizeof(IndexTupleData));
 		state->btps_lowkey->t_info = sizeof(IndexTupleData);
-		BTreeTupleSetNAtts(state->btps_lowkey, 0);
+		BTreeTupleSetNAtts(state->btps_lowkey, 0, false);
 	}
 
 	/*
diff --git a/src/backend/access/nbtree/nbtutils.c b/src/backend/access/nbtree/nbtutils.c
index 86cec248593..08d7201f196 100644
--- a/src/backend/access/nbtree/nbtutils.c
+++ b/src/backend/access/nbtree/nbtutils.c
@@ -2239,7 +2239,7 @@ _bt_truncate(Relation rel, IndexTuple lastleft, IndexTuple firstright,
 	 */
 	if (keepnatts <= nkeyatts)
 	{
-		BTreeTupleSetNAtts(pivot, keepnatts);
+		BTreeTupleSetNAtts(pivot, keepnatts, false);
 		return pivot;
 	}
 
@@ -2262,11 +2262,13 @@ _bt_truncate(Relation rel, IndexTuple lastleft, IndexTuple firstright,
 	/* Cannot leak memory here */
 	pfree(pivot);
 
-	/* Store heap TID in enlarged pivot tuple */
+	/*
+	 * Store all of firstright's key attribute values plus a tiebreaker heap
+	 * TID value in enlarged pivot tuple
+	 */
 	tidpivot->t_info &= ~INDEX_SIZE_MASK;
 	tidpivot->t_info |= newsize;
-	BTreeTupleSetNAtts(tidpivot, nkeyatts);
-	BTreeTupleSetAltHeapTID(tidpivot);
+	BTreeTupleSetNAtts(tidpivot, nkeyatts, true);
 	pivotheaptid = BTreeTupleGetHeapTID(tidpivot);
 
 	/*