Re: [HACKERS] reload-through-the-top-parent switch the partition table

--create below test data
create schema a;
create schema b;
create schema c;

create table t1 (a int,b text) partition by list(a);
create table a.t1_p1 partition of t1 FOR VALUES in (1,2,3,4) partition by list(a);
create table b.t1_p1_p1 partition of a.t1_p1 FOR VALUES in (1,2);
create table c.t1_p1_p2 partition of a.t1_p1 FOR VALUES in (3,4);
create table b.t1_p2 partition of t1 FOR VALUES in (5,6,7,8) partition by list(a);
create table a.t1_p2_p1 partition of b.t1_p2 FOR VALUES in (5,6);
create table t1_p2_p2 partition of b.t1_p2 FOR VALUES in (7,8);

insert into t1 values (8,'t1');
insert into a.t1_p1 values (2,'a.t1_p1');
insert into b.t1_p1_p1 values (1,'b.t1_p1_p1');
insert into c.t1_p1_p2 values (3,'c.t1_p1_p2');
insert into b.t1_p2 values (6,'b.t1_p2');
insert into a.t1_p2_p1 values (5,'a.t1_p2_p1');
insert into t1_p2_p2 values (7,'t1_p2_p1');
insert into t1 values (4 ,'t1');