From 337b60ed2e3e64ec229641c8d72d55b818c3db31 Mon Sep 17 00:00:00 2001
From: mkharitonov <mkharitonov@diasoft.ru>
Date: Wed, 23 Apr 2025 10:37:05 +0300
Subject: [PATCH] [PGPRO-11557] Fix infinite loop with multiple ORDER BY in RUM
 scan

---
 src/rumget.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/rumget.c b/src/rumget.c
index ca5d83ee00..84b3697dc7 100644
--- a/src/rumget.c
+++ b/src/rumget.c
@@ -1741,7 +1741,11 @@ entryFindItem(RumState * rumstate, RumScanEntry entry, RumItem * item, Snapshot
 	{
 		if (compareRumItemScanDirection(rumstate, entry->attnumOrig,
 							entry->scanDirection,
-							&entry->curItem, item) >= 0)
+							&entry->curItem, item) >= 0 &&
+							entry->offset >= 0 &&
+							entry->offset < entry->nlist &&
+							rumCompareItemPointers(&entry->curItem.iptr,
+												   &entry->list[entry->offset].iptr) == 0)
 			return;
 		while (entry->offset >= 0 && entry->offset < entry->nlist)
 		{