Chunchun Ye

After discussion with @alamb, we plan to do the implementation in two phases (i.e. two PRs): 1. Turn each sub expression into a case expression 2. Simplify the case expression...

There is a draft PR: https://github.com/apache/arrow-datafusion/pull/9223. The major feature is implemented, but there are two things I plan to do before I open it for review (see [details](https://github.com/apache/arrow-datafusion/pull/9223#issuecomment-1964468245)). I plan...

Here is an update of [the plan](https://github.com/apache/arrow-datafusion/issues/9171#issuecomment-1944228016) ## 1. Turn each sub expression into a case expression Implemented in https://github.com/apache/arrow-datafusion/pull/9223 ## 2. Simplify the case expression and make it easy...