diff --git a/src/backend/optimizer/util/pathnode.c b/src/backend/optimizer/util/pathnode.c
index 46778aaefd3..ec4a093d9fb 100644
--- a/src/backend/optimizer/util/pathnode.c
+++ b/src/backend/optimizer/util/pathnode.c
@@ -1216,7 +1216,7 @@ create_append_path(RelOptInfo *rel, List *subpaths, Relids required_outer,
 	pathnode->path.parallel_workers = parallel_workers;
 	pathnode->path.pathkeys = NIL;		/* result is always considered
 										 * unsorted */
-	pathnode->partitioned_rels = partitioned_rels;
+	pathnode->partitioned_rels = list_copy(partitioned_rels);
 	pathnode->subpaths = subpaths;
 
 	/*
@@ -1276,7 +1276,7 @@ create_merge_append_path(PlannerInfo *root,
 	pathnode->path.parallel_safe = rel->consider_parallel;
 	pathnode->path.parallel_workers = 0;
 	pathnode->path.pathkeys = pathkeys;
-	pathnode->partitioned_rels = partitioned_rels;
+	pathnode->partitioned_rels = list_copy(partitioned_rels);
 	pathnode->subpaths = subpaths;
 
 	/*
@@ -3238,7 +3238,7 @@ create_modifytable_path(PlannerInfo *root, RelOptInfo *rel,
 	pathnode->operation = operation;
 	pathnode->canSetTag = canSetTag;
 	pathnode->nominalRelation = nominalRelation;
-	pathnode->partitioned_rels = partitioned_rels;
+	pathnode->partitioned_rels = list_copy(partitioned_rels);
 	pathnode->resultRelations = resultRelations;
 	pathnode->subpaths = subpaths;
 	pathnode->subroots = subroots;
diff --git a/src/test/regress/expected/inherit.out b/src/test/regress/expected/inherit.out
index af7090ba0d6..35d182d5992 100644
--- a/src/test/regress/expected/inherit.out
+++ b/src/test/regress/expected/inherit.out
@@ -1918,3 +1918,34 @@ explain (costs off) select * from mcrparted where a = 20 and c > 20; -- scans mc
 (7 rows)
 
 drop table mcrparted;
+-- check that partitioned table Appends cope with being referenced in
+-- subplans
+create table parted_minmax (a int, b varchar(16)) partition by range (a);
+create table parted_minmax1 partition of parted_minmax for values from (1) to (10);
+create index parted_minmax1i on parted_minmax1 (a, b);
+insert into parted_minmax values (1,'12345');
+explain (costs off) select min(a), max(a) from parted_minmax where b = '12345';
+                                              QUERY PLAN                                               
+-------------------------------------------------------------------------------------------------------
+ Result
+   InitPlan 1 (returns $0)
+     ->  Limit
+           ->  Merge Append
+                 Sort Key: parted_minmax1.a
+                 ->  Index Only Scan using parted_minmax1i on parted_minmax1
+                       Index Cond: ((a IS NOT NULL) AND (b = '12345'::text))
+   InitPlan 2 (returns $1)
+     ->  Limit
+           ->  Merge Append
+                 Sort Key: parted_minmax1_1.a DESC
+                 ->  Index Only Scan Backward using parted_minmax1i on parted_minmax1 parted_minmax1_1
+                       Index Cond: ((a IS NOT NULL) AND (b = '12345'::text))
+(13 rows)
+
+select min(a), max(a) from parted_minmax where b = '12345';
+ min | max 
+-----+-----
+   1 |   1
+(1 row)
+
+drop table parted_minmax;
diff --git a/src/test/regress/sql/inherit.sql b/src/test/regress/sql/inherit.sql
index 7f34f43ec0c..70fe971d51f 100644
--- a/src/test/regress/sql/inherit.sql
+++ b/src/test/regress/sql/inherit.sql
@@ -661,3 +661,13 @@ explain (costs off) select * from mcrparted where a > -1;	-- scans all partition
 explain (costs off) select * from mcrparted where a = 20 and abs(b) = 10 and c > 10;	-- scans mcrparted4
 explain (costs off) select * from mcrparted where a = 20 and c > 20; -- scans mcrparted3, mcrparte4, mcrparte5
 drop table mcrparted;
+
+-- check that partitioned table Appends cope with being referenced in
+-- subplans
+create table parted_minmax (a int, b varchar(16)) partition by range (a);
+create table parted_minmax1 partition of parted_minmax for values from (1) to (10);
+create index parted_minmax1i on parted_minmax1 (a, b);
+insert into parted_minmax values (1,'12345');
+explain (costs off) select min(a), max(a) from parted_minmax where b = '12345';
+select min(a), max(a) from parted_minmax where b = '12345';
+drop table parted_minmax;