Yikf commented on PR #40699:
URL: https://github.com/apache/spark/pull/40699#issuecomment-1517335589
> which could cause issues when comparing the string representation of a row:
Sorry, I'm not sure what that means, does it mean compared to what was
written before this PR? Any problems if cast(null as string) with NULL, I see
that trino is also NULL
``` SQL
trino> select cast(null as varchar) as c0, null as c1;
c0 | c1
------+------
NULL | NULL
(1 row)
```
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