adriangb commented on PR #22908:
URL: https://github.com/apache/datafusion/pull/22908#issuecomment-5469828372

   One thing I pointed out to Andrew on a call but that was maybe never 
recorded here: a lot of the functions in `datafusion_functions_json` like 
`json_get_int` exist so that the structure `select (col->'key')::int` can be 
optimized to avoid extra intermediate steps and instruct the parser to 
materialize directly into an `int` or null. They are not necessarily meant to 
be exposed publicly, although because of crate structures and such we probably 
do have to make all of these functions public.


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