andygrove opened a new issue, #5093:
URL: https://github.com/apache/arrow-datafusion/issues/5093
**Describe the bug**
For conditional expressions, we currently evaluate both the true and false
expressions, which can lead to correctness issues.
For example, we cannot run this valid query.
```
❯ select case when x is null then 42 else x * x end from (select null as x);
ArrowError(ExternalError(Internal("Data type Null not supported for binary
operation 'multiply' on primitive arrays")))
```
**To Reproduce**
**Expected behavior**
**Additional context**
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