smgr.diff

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File	+	−
src/backend/storage/smgr/md.c	4	2

diff --git a/src/backend/storage/smgr/md.c b/src/backend/storage/smgr/md.c
index f3e4768160..fdc9f62fdf 100644
--- a/src/backend/storage/smgr/md.c
+++ b/src/backend/storage/smgr/md.c
@@ -213,6 +213,8 @@ mdinit(void)
 bool
 mdexists(SMgrRelation reln, ForkNumber forknum)
 {
+	MdSMgrRelation mdreln = (MdSMgrRelation) reln;
+
 	/*
 	 * Close it first, to ensure that we notice if the fork has been unlinked
 	 * since we opened it.  As an optimization, we can skip that in recovery,
@@ -221,7 +223,7 @@ mdexists(SMgrRelation reln, ForkNumber forknum)
 	if (!InRecovery)
 		mdclose(reln, forknum);
 
-	return (mdopenfork(reln, forknum, EXTENSION_RETURN_NULL) != NULL);
+	return (mdopenfork(mdreln, forknum, EXTENSION_RETURN_NULL) != NULL);
 }
 
 /*
@@ -284,7 +286,7 @@ mdcreate(SMgrRelation reln, ForkNumber forknum, bool isRedo)
 	mdfd->mdfd_segno = 0;
 
 	if (!SmgrIsTemp(reln))
-		register_dirty_segment(reln, forknum, mdfd);
+		register_dirty_segment(mdreln, forknum, mdfd);
 }
 
 /*