From a7aee78e85111d72854ad49f4b494ff01e19b5b9 Mon Sep 17 00:00:00 2001
From: gurkanindibay <gindibay@microsoft.com>
Date: Mon, 20 May 2024 15:47:01 +0300
Subject: [PATCH] Adds null check for node in HasRangeTableRef

---
 src/backend/distributed/worker/worker_shard_visibility.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/backend/distributed/worker/worker_shard_visibility.c b/src/backend/distributed/worker/worker_shard_visibility.c
index ccd1a897c..669ad5264 100644
--- a/src/backend/distributed/worker/worker_shard_visibility.c
+++ b/src/backend/distributed/worker/worker_shard_visibility.c
@@ -504,6 +504,11 @@ FilterShardsFromPgclass(Node *node, void *context)
 static bool
 HasRangeTableRef(Node *node, int *varno)
 {
+	if (node == NULL)
+    {
+        return false;
+    }
+
 	if (IsA(node, RangeTblRef))
 	{
 		RangeTblRef *rangeTblRef = (RangeTblRef *) node;