From 5a3648b2cbb67507ee9867bb8e57c0b23448d21a Mon Sep 17 00:00:00 2001
From: Naisila Puka <37271756+naisila@users.noreply.github.com>
Date: Tue, 7 Oct 2025 11:31:41 +0300
Subject: [PATCH] PG18: fix yet another unregistered snapshot crash (#8228)

PG18 added an assertion that a snapshot is active or registered before
it's used. Relevant PG commit
https://github.com/postgres/postgres/commit/8076c00592e40e8dbd1fce7a98b20d4bf075e4ba

Fixes #8209
---
 src/backend/columnar/columnar_tableam.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/backend/columnar/columnar_tableam.c b/src/backend/columnar/columnar_tableam.c
index 2b11dd27a..1158005c8 100644
--- a/src/backend/columnar/columnar_tableam.c
+++ b/src/backend/columnar/columnar_tableam.c
@@ -1245,10 +1245,14 @@ LogRelationStats(Relation rel, int elevel)
 	foreach(stripeMetadataCell, stripeList)
 	{
 		StripeMetadata *stripe = lfirst(stripeMetadataCell);
+
+		Snapshot snapshot = RegisterSnapshot(GetTransactionSnapshot());
 		StripeSkipList *skiplist = ReadStripeSkipList(relfilelocator, stripe->id,
 													  RelationGetDescr(rel),
 													  stripe->chunkCount,
-													  GetTransactionSnapshot());
+													  snapshot);
+		UnregisterSnapshot(snapshot);
+
 		for (uint32 column = 0; column < skiplist->columnCount; column++)
 		{
 			bool attrDropped = Attr(tupdesc, column)->attisdropped;