tustvold commented on code in PR #5247:
URL: https://github.com/apache/arrow-rs/pull/5247#discussion_r1436638219


##########
object_store/src/aws/dynamo.rs:
##########
@@ -61,16 +63,24 @@ const STORE: &str = "DynamoDB";
 ///
 /// The DynamoDB schema is as follows:
 ///
-/// * A string hash key named `"key"`
+/// * A string partition key named `"path"`
+/// * A string sort key named `"etag"`

Review Comment:
   This is a breaking change, but given #4918 was only merged this morning and 
hasn't been released I think that is fine.
   
   This approach avoids needing a delimiter to separate the path and etag when 
both encoded in the partition key, which after #5020 can't be `#`, whilst also 
being easy to understand



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