diff --git a/src/gausskernel/optimizer/plan/planstartwith.cpp b/src/gausskernel/optimizer/plan/planstartwith.cpp
index 274e999ad..0788d3f14 100644
--- a/src/gausskernel/optimizer/plan/planstartwith.cpp
+++ b/src/gausskernel/optimizer/plan/planstartwith.cpp
@@ -555,6 +555,16 @@ static char *CheckAndFixSiblingsColName(PlannerInfo *root, Plan *basePlan,
                 errmsg("expression with none-var in order siblings is not supported")));
     }
 
+    foreach (lc, vars) {
+        Var* var = (Var *)lfirst(lc);
+        RangeTblEntry *rte = root->simple_rte_array[var->varno];
+        char *raw_cte_alias = (char *)strVal(list_nth(rte->eref->colnames, var->varattno - 1));
+        if (raw_cte_alias != NULL && IsPseudoReturnColumn(raw_cte_alias)) {
+            ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+                    errmsg("Not support refer startwith Pseudo column in order siblings by.")));
+        }
+    }
+
     /* do not support multi-column refs specified as order sibling's sort entry */
     if (list_length(vars) > 1) {
         ereport(WARNING, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
@@ -565,7 +575,12 @@ static char *CheckAndFixSiblingsColName(PlannerInfo *root, Plan *basePlan,
     RangeTblEntry *rte = root->simple_rte_array[var->varno];
     char *raw_cte_alias = (char *)strVal(list_nth(rte->eref->colnames, var->varattno - 1));
     resultColName = strrchr(raw_cte_alias, '@');
-    resultColName += 1;   /* fix '@' offset */
+    if (resultColName != NULL) {
+        resultColName += 1;   /* fix '@' offset */
+    } else {
+        ereport(ERROR, (errmodule(MOD_OPT_PLANNER),
+                errmsg("Invalid column name %s in order siblings is found.", raw_cte_alias)));
+    }
 
     return resultColName;
 }
diff --git a/src/test/regress/expected/sw_bugfix-2.out b/src/test/regress/expected/sw_bugfix-2.out
index 99cd9f242..76c218f8b 100755
--- a/src/test/regress/expected/sw_bugfix-2.out
+++ b/src/test/regress/expected/sw_bugfix-2.out
@@ -2342,3 +2342,20 @@ explain select * from sw_tb_3 where exists (select * from sw_tb_1, sw_tb_2 where
 drop table sw_tb_1;
 drop table sw_tb_2;
 drop table sw_tb_3;
+-- test ORDER SIBLINGS BY clause which contains an expression or alias with a pseudocolumn
+drop table if exists hier;
+create table hier(parent varchar(30),child varchar(30));
+insert into hier values(null,'Asia');
+insert into hier values('Asia','China');
+insert into hier values('Asia','Japan');
+insert into hier values('Asia','ENGLAND');
+insert into hier values('Asia','HONGKONG');
+insert into hier values('China','BEIJING');
+insert into hier values('China','SHANGHAI');
+insert into hier values('China','AK47');
+insert into hier values('China','天津');
+select child, level, lpad(' ', level*3, ' ')||child c1 from hier start with parent is null connect by prior child = parent ORDER SIBLINGS BY c1;
+ERROR:  Not support refer startwith Pseudo column in order siblings by.
+select child, level, lpad(' ', level*3, ' ')||child c1, level c2 from hier start with parent is null connect by prior child = parent ORDER SIBLINGS BY c2;
+ERROR:  Not support refer startwith Pseudo column in order siblings by.
+drop table hier;
\ No newline at end of file
diff --git a/src/test/regress/sql/sw_bugfix-2.sql b/src/test/regress/sql/sw_bugfix-2.sql
index d98ff7900..ec2127801 100644
--- a/src/test/regress/sql/sw_bugfix-2.sql
+++ b/src/test/regress/sql/sw_bugfix-2.sql
@@ -865,4 +865,20 @@ explain select * from sw_tb_1,sw_tb_2 where (sw_tb_1.a+sw_tb_1.b=sw_tb_2.b or sw
 explain select * from sw_tb_3 where exists (select * from sw_tb_1, sw_tb_2 where sw_tb_1.a + sw_tb_2.a = sw_tb_3.a connect by level < 2);
 drop table sw_tb_1;
 drop table sw_tb_2;
-drop table sw_tb_3;
\ No newline at end of file
+drop table sw_tb_3;
+
+-- test ORDER SIBLINGS BY clause which contains an expression or alias with a pseudocolumn
+drop table if exists hier;
+create table hier(parent varchar(30),child varchar(30));
+insert into hier values(null,'Asia');
+insert into hier values('Asia','China');
+insert into hier values('Asia','Japan');
+insert into hier values('Asia','ENGLAND');
+insert into hier values('Asia','HONGKONG');
+insert into hier values('China','BEIJING');
+insert into hier values('China','SHANGHAI');
+insert into hier values('China','AK47');
+insert into hier values('China','天津');
+select child, level, lpad(' ', level*3, ' ')||child c1 from hier start with parent is null connect by prior child = parent ORDER SIBLINGS BY c1;
+select child, level, lpad(' ', level*3, ' ')||child c1, level c2 from hier start with parent is null connect by prior child = parent ORDER SIBLINGS BY c2;
+drop table hier;
\ No newline at end of file