diff --git a/src/common/backend/parser/parse_func.cpp b/src/common/backend/parser/parse_func.cpp
index b2c59516453fdacf5dd0f6b3a73464595435f74f..1e7e48f85ce6b1e6ae50ec390554e8e87dbba9d6 100644
--- a/src/common/backend/parser/parse_func.cpp
+++ b/src/common/backend/parser/parse_func.cpp
@@ -1454,7 +1454,14 @@ FuncCandidateList sort_candidate_func_list(FuncCandidateList oldCandidates)
         }
         candidates[smallestIndex] = NULL;
     }
-
+    
+    for (int i = 0; i < size; i++) {
+        if (candidates[i] != NULL) {
+            lastCandidate->next = candidates[i];
+            lastCandidate = lastCandidate->next;
+        }
+    }
+    lastCandidate->next = NULL;
     pfree(candidates);
     return sortedCandidates;
 }