From fac4250770bca66542d7838760e98b0b81acab36 Mon Sep 17 00:00:00 2001
From: Grigory Smolkin <g.smolkin@postgrespro.ru>
Date: Mon, 27 Nov 2017 21:51:45 +0300
Subject: [PATCH] fix PAGE backup copying not changed files

---
 src/dir.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dir.c b/src/dir.c
index a257d3bd..c0e8ae07 100644
--- a/src/dir.c
+++ b/src/dir.c
@@ -149,7 +149,7 @@ pgFileInit(const char *path)
 	file->is_datafile = false;
 	file->linked = NULL;
 	file->pagemap.bitmap = NULL;
-	file->pagemap.bitmapsize = PageBitmapIsAbsent;
+	file->pagemap.bitmapsize = (current.backup_mode == BACKUP_MODE_DIFF_PAGE) ? PageBitmapIsEmpty : PageBitmapIsAbsent;
 	file->tblspcOid = 0;
 	file->dbOid = 0;
 	file->relOid = 0;