yahoNanJing opened a new issue #2072:
URL: https://github.com/apache/arrow-datafusion/issues/2072


   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.**
   <!-- A clear and concise description of what the problem is. Ex. I'm always 
frustrated when [...] 
   (This section helps Arrow developers understand the context and *why* for 
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   Currently when we utilize the datafusion core as a library, it's possible to 
do the remote object store registration manually in the script code. However, 
for a long running standalone system, like Ballista, there's no place to do the 
registration manually. And in general, the remote object stores supported will 
not be changed. Therefore, it's better to provide a mechanism to register some 
object stores automatically rather than manually do the registration.
   
   **Describe the solution you'd like**
   <!-- A clear and concise description of what you want to happen. -->
   With #2065, the object store extensions will no longer depend on the 
datafusion core. And now the datafusion core can depend on them. We can set 
those object stores as optional features in the datafusion core and let users 
decide whether to introduce them at the compilation time.
   
   **Describe alternatives you've considered**
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features you've considered. -->
   
   **Additional context**
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