matthewmturner commented on a change in pull request #1541:
URL: https://github.com/apache/arrow-datafusion/pull/1541#discussion_r783409315



##########
File path: datafusion/src/error.rs
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@@ -101,6 +104,12 @@ impl From<ParserError> for DataFusionError {
     }
 }
 
+impl From<Box<dyn Error + Send + Sync>> for DataFusionError {
+    fn from(err: Box<dyn Error + Send + Sync>) -> Self {
+        DataFusionError::External(err)
+    }
+}
+

Review comment:
       Sounds good and makes sense, thanks much @houqp.  I will work on that.
   
   FYI there is existing `IoError(io::Error)` variant.  I think ill have to see 
how well that aligns with the types of errors we get in the `ObjectStore` (i.e 
are the `io::Error`?)




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