diff --git a/src/gausskernel/optimizer/plan/createplan.cpp b/src/gausskernel/optimizer/plan/createplan.cpp
index c326b70cd9fca77a9ddf0dfce4783c510d368728..d4b079f07781799efe284c9b67aef5945c285595 100755
--- a/src/gausskernel/optimizer/plan/createplan.cpp
+++ b/src/gausskernel/optimizer/plan/createplan.cpp
@@ -2699,6 +2699,11 @@ static Scan* create_indexscan_plan(
         qpqual = lappend(qpqual, rinfo);
     }
 
+    if (u_sess->opt_cxt.is_under_append_plan && tlist == NIL) {
+        Const *c = makeConst(INT4OID, -1, InvalidOid, -2, (Datum)0, true, false);
+        tlist = lappend(tlist, makeTargetEntry((Expr*)c, 1, NULL, true));
+    }
+
     /* Sort clauses into best execution order */
     qpqual = order_qual_clauses(root, qpqual);
 
diff --git a/src/test/regress/expected/test_union_all_orderby.out b/src/test/regress/expected/test_union_all_orderby.out
index a0da822e95f211fd54bf7c13e5cc2ccffc58f734..05eb1fd43a2d0f2654fd38a971b5edce0d2388a0 100644
--- a/src/test/regress/expected/test_union_all_orderby.out
+++ b/src/test/regress/expected/test_union_all_orderby.out
@@ -41,3 +41,54 @@ insert into tb3 values(6);
  7
 (7 rows)
 
+reset enable_union_all_subquery_orderby;
+-- test union all with none targetlist
+drop table if exists union_pseudo_tlist cascade;
+NOTICE:  table "union_pseudo_tlist" does not exist, skipping
+create table union_pseudo_tlist(id int);
+insert into union_pseudo_tlist values(1);
+create index on union_pseudo_tlist(id);
+set enable_seqscan=off;
+select count(*) from union_pseudo_tlist where now() is not null and id is not null;
+ count 
+-------
+     1
+(1 row)
+
+explain(costs off) select count(*) from (select * from union_pseudo_tlist union all select * from union_pseudo_tlist) where now() is not null;
+                                          QUERY PLAN                                           
+-----------------------------------------------------------------------------------------------
+ Aggregate
+   ->  Result
+         One-Time Filter: (now() IS NOT NULL)
+         ->  Append
+               ->  Result
+                     One-Time Filter: (now() IS NOT NULL)
+                     ->  Index Only Scan using union_pseudo_tlist_id_idx on union_pseudo_tlist
+               ->  Result
+                     One-Time Filter: (now() IS NOT NULL)
+                     ->  Index Only Scan using union_pseudo_tlist_id_idx on union_pseudo_tlist
+(10 rows)
+
+select count(*) from (select * from union_pseudo_tlist union all select * from union_pseudo_tlist) where now() is not null;
+ count 
+-------
+     2
+(1 row)
+
+select count(*) from (select * from union_pseudo_tlist union all select * from union_pseudo_tlist) where now() is not null and id is not null;
+ count 
+-------
+     2
+(1 row)
+
+-- use pbe
+prepare test_index_pseudo as select count(*) from (select * from union_pseudo_tlist union all select * from union_pseudo_tlist) where id in (1) and id=$1;
+execute test_index_pseudo(1);
+ count 
+-------
+     2
+(1 row)
+
+drop table if exists union_pseudo_tlist cascade;
+reset enable_seqscan;
diff --git a/src/test/regress/sql/test_union_all_orderby.sql b/src/test/regress/sql/test_union_all_orderby.sql
index d239a68d290d43bf6bcb77c55f0c2942fef39377..490234776226eb0190005179185cd7b9e4d47ff5 100644
--- a/src/test/regress/sql/test_union_all_orderby.sql
+++ b/src/test/regress/sql/test_union_all_orderby.sql
@@ -12,4 +12,26 @@ insert into tb3 values(6);
 
 (select * from tb1 order by a) union all (select * from tb2 order by a);
 (select * from tb1 order by a) union all (select * from tb2 order by a desc);
-(select * from tb1 order by a) union all (select * from tb2 order by a) union all (select * from tb3 order by a);
\ No newline at end of file
+(select * from tb1 order by a) union all (select * from tb2 order by a) union all (select * from tb3 order by a);
+
+reset enable_union_all_subquery_orderby;
+
+-- test union all with none targetlist
+drop table if exists union_pseudo_tlist cascade;
+create table union_pseudo_tlist(id int);
+insert into union_pseudo_tlist values(1);
+create index on union_pseudo_tlist(id);
+set enable_seqscan=off;
+
+select count(*) from union_pseudo_tlist where now() is not null and id is not null;
+
+explain(costs off) select count(*) from (select * from union_pseudo_tlist union all select * from union_pseudo_tlist) where now() is not null;
+select count(*) from (select * from union_pseudo_tlist union all select * from union_pseudo_tlist) where now() is not null;
+select count(*) from (select * from union_pseudo_tlist union all select * from union_pseudo_tlist) where now() is not null and id is not null;
+
+-- use pbe
+prepare test_index_pseudo as select count(*) from (select * from union_pseudo_tlist union all select * from union_pseudo_tlist) where id in (1) and id=$1;
+execute test_index_pseudo(1);
+
+drop table if exists union_pseudo_tlist cascade;
+reset enable_seqscan;