BlakeOrth commented on code in PR #18855:
URL: https://github.com/apache/datafusion/pull/18855#discussion_r2550788827


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datafusion/execution/src/cache/cache_manager.rs:
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@@ -42,8 +47,18 @@ pub type FileStatisticsCache =
 /// especially when done over remote object stores.
 ///
 /// See [`crate::runtime_env::RuntimeEnv`] for more details
-pub type ListFilesCache =
-    Arc<dyn CacheAccessor<Path, Arc<Vec<ObjectMeta>>, Extra = ObjectMeta>>;
+pub trait ListFilesCache:

Review Comment:
   @alamb After reading your thoughts on this I'm wondering if a more complex 
cache infrastructure would be a good project to start in 
https://github.com/datafusion-contrib and if it gains enough traction perhaps 
it could be promoted to the core repo?



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