alamb commented on issue #4615:
URL:
https://github.com/apache/arrow-datafusion/issues/4615#issuecomment-1362056105
> Why do we cover up the error, instead of exposing them? Besides, we should
not return a compile error at runtime, even if the branch won't be hit. No
static typed language would do this (I guess SQL is not a dynamic typed
language 🤔).
Well I think the rationale / question is if SQL expression semantics allow /
require eager evaluation or if delayed evaluation
A more realistic example might be to use the CASE to explicitly guard
against a divide by zero
```sql
CASE
WHEN num <> 0 THEN value / num
ELSE 0.0
END
```
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