SteveLauC opened a new pull request, #9377:
URL: https://github.com/apache/arrow-datafusion/pull/9377
## Which issue does this PR close?
## Rationale for this change
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## What changes are included in this PR?
This PR fixes the panic that happens if no arguments are given to `isnan()`:
before:
```sh
❯ select isnan();
thread 'main' panicked at
arrow-datafusion/datafusion/functions/src/math/nans.rs:67:39:
index out of bounds: the len is 0 but the index is 0
```
after:
```sh
❯ select isnan();
Error during planning: No function matches the given name and argument types
'isnan()'. You might need to add explicit type casts.
Candidate functions:
isnan(Float32)
isnan(Float64)
```
## Are these changes tested?
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## Are there any user-facing changes?
no
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