guojidan opened a new issue, #9363:
URL: https://github.com/apache/arrow-datafusion/issues/9363
### Is your feature request related to a problem or challenge?
`NVL` is already supported #9284 , maybe we can support `NVL2` function, its
functions are as follows:
### Describe
Returns \<expr2\> if \<expr1\> is not NULL; otherwise, it returns \<expr3\>.
### Syntax
> NVL2(\<expr1\> , \<expr2\> , \<expr3\>)
### Examples
SELECT NVL2('a', 'b', 'c'), NVL2(NULL, 'b', 'c');
┌────────────────────────────────────────────┐
│ nvl2('a', 'b', 'c') │ nvl2(null, 'b', 'c') │
├─────────────────────┼──────────────────────┤
│ b │ c │
└────────────────────────────────────────────┘
I think this function is useful 🤔
### Describe the solution you'd like
_No response_
### Describe alternatives you've considered
_No response_
### Additional context
_No response_
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