AdamGS opened a new pull request, #25029:
URL: https://github.com/apache/datafusion/pull/25029
## Which issue does this PR close?
- Closes #25024
## Rationale for this change
NOT IN can return incorrect results when expressions such as NULLIF produce
NULL from non-nullable inputs. Anti joins can retain rows that should be
excluded, while mark joins lose SQL UNKNOWN.
## What changes are included in this PR?
Check join-key expression nullability using the full expression instead of
over the inputs.
## What is the testing strategy for this PR?
Added SLT tests to the null aware mark and anti joins
## Are there any user-facing changes?
None
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