ERROR: bogus varattno for OUTER var: 4 (ruleutils.c:3636)

[hsyuan]

On gpdb master with Orca on.
Repro:

create table foo(a int, b int);
create table bar(a int, b int);
create table pt(a int, b int) distributed by (a)
partition by range(b) (start(1) end(5) every(2));

explain select * from foo, pt where foo.a = pt.a and pt.b = (select max(b) from bar);
ERROR:  bogus varattno for OUTER var: 4 (ruleutils.c:3636)

If I insert some data into foo, run the query, got a different error message:

insert into foo select i, i from generate_series(1,100) i;
explain select * from foo, pt where foo.a = pt.a and pt.b = (select max(b) from bar);
ERROR:  bogus varno: 65000 (ruleutils.c:3720)

explain select * from foo, pt, bar where bar.a=pt.b and foo.a > pt.b;
ERROR:  bogus varno: 65000 (ruleutils.c:3720)

[vraghavan78]

All works on GPDB 5X.

vraghavan=# explain select * from foo, pt, bar where bar.a=pt.b and foo.a > pt.b;
                                                           QUERY PLAN
--------------------------------------------------------------------------------------------------------------------------------
 Gather Motion 3:1  (slice3; segments: 3)  (cost=0.00..1324466.99 rows=1 width=24)
   ->  Hash Join  (cost=0.00..1324466.99 rows=1 width=24)
         Hash Cond: bar.a = pt.b
         ->  Table Scan on bar  (cost=0.00..431.00 rows=1 width=8)
         ->  Hash  (cost=1324035.99..1324035.99 rows=1 width=16)
               ->  Redistribute Motion 3:3  (slice2; segments: 3)  (cost=0.00..1324035.99 rows=1 width=16)
                     Hash Key: pt.b
                     ->  Nested Loop  (cost=0.00..1324035.99 rows=1 width=16)
                           Join Filter: foo.a > pt.b
                           ->  Broadcast Motion 3:3  (slice1; segments: 3)  (cost=0.00..431.00 rows=1 width=8)
                                 ->  Sequence  (cost=0.00..431.00 rows=1 width=8)
                                       ->  Partition Selector for pt (dynamic scan id: 1)  (cost=10.00..100.00 rows=34 width=4)
                                             Partitions selected: 2 (out of 2)
                                       ->  Dynamic Table Scan on pt (dynamic scan id: 1)  (cost=0.00..431.00 rows=1 width=8)
                           ->  Table Scan on foo  (cost=0.00..431.00 rows=34 width=8)
 Settings:  optimizer=on
 Optimizer status: PQO version 3.21.0
(17 rows)