From 0abf3ab1f69b3564f5a0838bdb19b05456f7b22a Mon Sep 17 00:00:00 2001
From: liuxiaoyu <liuxiaoyu@hashdata.cn>
Date: Mon, 13 Nov 2023 15:08:12 +0800
Subject: [PATCH] Fix bug deduplicate elemlist is null when elemlist size is 1.

---
 src/backend/utils/init/miscinit.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/backend/utils/init/miscinit.c b/src/backend/utils/init/miscinit.c
index 9a8902c24a4..df02d202663 100644
--- a/src/backend/utils/init/miscinit.c
+++ b/src/backend/utils/init/miscinit.c
@@ -1809,10 +1809,7 @@ expand_shared_preload_libraries_string()
 
 
 	/* deduplicate list string */
-	if (list_length(elemlist) > 1)
-	{
-		deduplicate_elemlist = removeDuplicates(elemlist);
-	}
+	deduplicate_elemlist = removeDuplicates(elemlist);
 
 	/* format string delimiter with ',' */
 	StringInfoData expand_string;