From e55a3fb8cfa132b4645107ac0fddc1bd75c36eab Mon Sep 17 00:00:00 2001
From: Denis Erokhin <erohin-d@datagile.ru>
Date: Mon, 22 Jan 2024 11:18:45 +0300
Subject: [PATCH] Open transaction block when isolation level uses snapshot

---
 src/backend/distributed/executor/executor_util_tasks.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/backend/distributed/executor/executor_util_tasks.c b/src/backend/distributed/executor/executor_util_tasks.c
index 6a3eec8fc..60ca84f14 100644
--- a/src/backend/distributed/executor/executor_util_tasks.c
+++ b/src/backend/distributed/executor/executor_util_tasks.c
@@ -80,8 +80,8 @@ TaskListRequiresRollback(List *taskList)
 
 	if (ReadOnlyTask(task->taskType))
 	{
-		return SelectOpensTransactionBlock &&
-			   IsTransactionBlock();
+		return (SelectOpensTransactionBlock && IsTransactionBlock()) ||
+				IsolationUsesXactSnapshot();
 	}
 
 	if (IsMultiStatementTransaction())