peterxcli commented on issue #23376:
URL: https://github.com/apache/datafusion/issues/23376#issuecomment-5025773266
> I think starting with HashJoinExec would be good
@gene-bordegaray @jayshrivastava could I help with this? My current high
level understanding is that `CASE range` is not supported yet, for example,
hash join's `SharedBuildAccumulator.build_filter` only support `CASE hash` for
now.
1. So what we have to do in first step is make the `SharedBuildAccumulator`
able to build sth like:
```sql
CASE range_partition_id(key)
WHEN 0 THEN F0(key)
WHEN 1 THEN F1(key)
WHEN 2 THEN F2(key)
END
```
which should the "global dynamic filter" you mentioned in issue description.
I guess this would be simpler than building `CASE hash` as we can just reuse
the existing split point as partition function.
2. `HashJoinExec`
- Dont reject range partition
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