liukun4515 commented on issue #4211:
URL:
https://github.com/apache/arrow-datafusion/issues/4211#issuecomment-1343744603
> For the Anti Joins converted from EXCEPT clause, our implement is correct.
For the Anti Joins converted from NOT EXISTS, our implement should be correct,
need to confirm. For the Anti Joins converted from NOT IN, we have to handle
Null cases as NAAJ.
I find the Join in the datafusion with a attribute
```
/// If null_equals_null is true, null == null else null != null
pub null_equals_null: bool,
```
, can this resolve the Null-Aware in the HASH-JOIN?
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