alamb commented on PR #5511:
URL: 
https://github.com/apache/arrow-datafusion/pull/5511#issuecomment-1462706360

   > > If this syntax is not deprecated, it should probably be tested as well?
   
   > I agree it should be tested. I will review our existing coverage and see 
if anything else is needed
   
   I reviewed the use of `binary_expr` and I think there is plenty of other 
coverage (see 
https://github.com/search?q=repo%3Aapache%2Farrow-datafusion%20binary_expr&type=code)
   
   I didn't see much focused testing for the functions defined in in 
https://github.com/apache/arrow-datafusion/blob/main/datafusion/expr/src/expr_fn.rs
   
   
https://github.com/apache/arrow-datafusion/blob/main/datafusion/expr/src/expr_fn.rs
   
   Thus I conclude this PR doesn't impact the test coverage for expression 
creation functions. 
   
   If we want to cover the functions in `expr_fn.rs` more deliberately or in a 
more structured way, I think we could do it as a follow on PR / add tests 
specifically for that coverage, rather than rely on tests for other 
functionality (simplification) covering somewhat unrelated functionality (expr 
creation)


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