Akshat-Jain opened a new pull request, #16780:
URL: https://github.com/apache/druid/pull/16780
### Description
Currently, queries like the following give incorrect results:
```sql
select countryName, cityName, channel,
row_number() over (partition by array[1,2,length(cityName)] order by
countryName) as c
from wikipedia
where countryName in ('Austria', 'Republic of Korea')
group by countryName, cityName, channel
```
This is because while calculating the partitioning boundaries, we use
Objects.equals() to check the value for partition column. But it returns false
when trying to compare [1,2,null] against [1,2,null] because of the presence of
null value.
This PR changes the comparison logic to use NullableTypeStrategy for the
column type.
<hr>
This PR has:
- [x] been self-reviewed.
- [ ] added documentation for new or modified features or behaviors.
- [ ] a release note entry in the PR description.
- [ ] added Javadocs for most classes and all non-trivial methods. Linked
related entities via Javadoc links.
- [ ] added or updated version, license, or notice information in
[licenses.yaml](https://github.com/apache/druid/blob/master/dev/license.md)
- [ ] added comments explaining the "why" and the intent of the code
wherever would not be obvious for an unfamiliar reader.
- [x] added unit tests or modified existing tests to cover new code paths,
ensuring the threshold for [code
coverage](https://github.com/apache/druid/blob/master/dev/code-review/code-coverage.md)
is met.
- [ ] added integration tests.
- [ ] been tested in a test Druid cluster.
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