diff --git src/backend/access/nbtree/nbtsearch.c src/backend/access/nbtree/nbtsearch.c
index ac98589477b876cfc8470ea03fb39fa43d5ea9c5..e07ae925332a923da73eb2bb28809e79f4bd7a1b 100644
--- src/backend/access/nbtree/nbtsearch.c
+++ src/backend/access/nbtree/nbtsearch.c
@@ -203,6 +203,37 @@ _bt_moveright(Relation rel,
 	return buf;
 }
 
+void
+_bt_printindextuple(Relation rel,
+			int keysz,
+			ScanKey scankey,
+			Page page,
+			OffsetNumber offnum)
+{
+	TupleDesc		itupdesc = RelationGetDescr(rel);
+	BTPageOpaque	opaque = (BTPageOpaque) PageGetSpecialPointer(page);
+	IndexTuple		itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, offnum));;
+	int				i;
+
+	fprintf(stdout, "%d: ", offnum);
+
+	for (i = 1; i <= keysz; i++)
+	{
+		Datum		datum;
+		bool		isNull;
+		int32		result;
+
+		datum = index_getattr(itup, scankey->sk_attno, itupdesc, &isNull);
+
+		if (i > 1) fprintf(stdout, ", ");
+		fprintf(stdout, "%d", DatumGetInt32(datum));
+
+		scankey++;
+	}
+
+	fprintf(stdout, "\n");
+}
+
 /*
  *	_bt_binsrch() -- Do a binary search for a key on a particular page.
  *
@@ -260,6 +291,16 @@ _bt_binsrch(Relation rel,
 	if (high < low)
 		return low;
 
+	fprintf(stdout, "-----------------------\n");
+	fprintf(stdout, "low: %d, high: %d\n", low, high);
+
+	int j;
+	for (j = low; j <= high; j++) {
+		_bt_printindextuple(rel, keysz, scankey, page, j);
+	}
+
+	fprintf(stdout, "-----------------------\n");
+
 	/*
 	 * Binary search to find the first key on the page >= scan key, or first
 	 * key > scankey when nextkey is true.
diff --git src/include/access/nbtree.h src/include/access/nbtree.h
index eef67f54b504e73b10d4e1b2f12472eeb8481ffa..25b86020af3bdb0e3d2f1c6e730c70a68fc6a9a1 100644
--- src/include/access/nbtree.h
+++ src/include/access/nbtree.h
@@ -643,6 +643,8 @@ extern int	_bt_pagedel(Relation rel, Buffer buf, BTStack stack);
 /*
  * prototypes for functions in nbtsearch.c
  */
+extern void _bt_printindextuple(Relation rel, int keysz,
+		ScanKey scankey, Page page, OffsetNumber offnum);
 extern BTStack _bt_search(Relation rel,
 		   int keysz, ScanKey scankey, bool nextkey,
 		   Buffer *bufP, int access);