Describe the bug

The test test_round_trip_tpch_queries shows that only 4 tpc-h queries have matching physical plans before serialization and after deserialization. @XiangpengHao has pointed out that there are at least 2 places to fix: display and hashset

To Reproduce

See test_round_trip_tpch_queries

Expected behavior

All physical plans for all queries should match

Additional context

No response