Toby1009 commented on PR #25746:
URL: https://github.com/apache/datafusion/pull/25746#issuecomment-5951416566
There seems to be another ordering edge case when negative inputs produce
`NaN`, even with a base greater than 1:
```sql
SELECT x, log(2.0, x) AS l
FROM (
SELECT x
FROM (VALUES (-1.0), (1.0), (4.0)) AS t(x)
ORDER BY x
LIMIT 3
)
ORDER BY l ASC;
```
The outer sort is removed, returning `l` as `NaN, 0, 2` instead of `0, 2,
NaN`.
This is pre-existing, so I don’t think it needs to block this PR. Maybe we
could open a follow-up issue to track it?
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