jackwener commented on pull request #2026:
URL:
https://github.com/apache/arrow-datafusion/pull/2026#issuecomment-1069911561
This postgresql example is more directly.
```sql
explain select id, firstname from
(select id, firstname, lastname from scientist where id > 3 ) t
where lastname = 's';
QUERY PLAN
--
Seq Scan on scientist (cost=0.00..17.20 rows=1 width=72)
Filter: ((id > 3) AND ((lastname)::text = 's'::text))
```
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