nuno-faria commented on PR #17153:
URL: https://github.com/apache/datafusion/pull/17153#issuecomment-3189444721
Thanks @adriangb for working on this.
I think it would be nice to add a sqllogictest example showing the pushdown.
Here is an example:
```sql
copy (select i as k from generate_series(1, 10) t(i)) to 't1.parquet';
copy (select i as k, i as v from generate_series(1, 100) t(i)) to
't2.parquet';
create external table t1 stored as parquet location 't1.parquet';
create external table t2 stored as parquet location 't2.parquet';
select *
from t1
where k in (
select k
from t2
where t2.v >= 10
);
```
However, I noticed that the filter is being pushed down to the wrong table:
```sql
HashJoinExec
DataSourceExec t1.parquet -- should be added to t1
DataSourceExec t2.parquet predicate=v@1 >= 10 AND
DynamicFilterPhysicalExpr [ k@0 >= 1 AND k@0 <= 10 ]
```
I checked and it is also happening with inner joins
(https://github.com/apache/datafusion/issues/17196), so its probably not
related to this specific PR.
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