Implement lazy evaluation for nvl #17982
Description
Is your feature request related to a problem or challenge?
DataFusion's CASE handling is quite optimized and handles many cases with constants, lazy evaluation, and more
Recently, @chenkovsky fixed lazy evaluation for coalesce by rewriting it to use CASE in PR:
This both made the code faster and more correct
Describe the solution you'd like
We can do the same thing for the nvl function, as suggested by @pepijnve in #17813 (comment)
https://github.com/apache/datafusion/blob/main/datafusion/functions/src/core/nvl.rs
Describe alternatives you've considered
No response
Additional context
No response