afedulov commented on PR #25938:
URL: https://github.com/apache/flink/pull/25938#issuecomment-2585894708
Just to clarify - this PR is solely about casting between to BOOLEAN. All of
the below expressions work:
```sql
-- Casting NaN as BOOLEAN
SELECT CAST(SQRT(-1) AS BOOLEAN) as nan;
-> TRUE
-- Casting Infinity, -Inifinity as BOOLEAN
SELECT CAST(power(0, -1)AS BOOLEAN) as infinity_to_boolean,
CAST(-power(0, -1)AS BOOLEAN) as neg_infinity_to_boolean;
-> TRUE, TRUE
```
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