andygrove commented on PR #783:
URL: https://github.com/apache/datafusion-comet/pull/783#issuecomment-2271285188
> @andygrove Somehow `TPC-DS Correctness / Run TPCDSQuerySuite (broadcast)`
failed.
>
> ```
> - q97 *** FAILED *** (1 second, 268 milliseconds)
> java.lang.Exception: Expected "537833 285408 200", but got "538012
285422 200" Result did not match
> ```
q97 (partial)
```sql
select sum(case when ssci.customer_sk is not null and csci.customer_sk is
null then 1 else 0 end) store_only
,sum(case when ssci.customer_sk is null and csci.customer_sk is not
null then 1 else 0 end) catalog_only
,sum(case when ssci.customer_sk is not null and csci.customer_sk is
not null then 1 else 0 end) store_and_catalog
from ssci full outer join csci on (ssci.customer_sk=csci.customer_sk
and ssci.item_sk = csci.item_sk)
```
Seems like this may be a regression in DataFusion. I did make a change to
`IsNotNull`. I wonder if that is an issue.
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