s1ck commented on issue #24107: [SPARK-27174][SQL] Add support for casting 
integer types to binary
URL: https://github.com/apache/spark/pull/24107#issuecomment-473723470
 
 
   @maropu I'm having some trouble fixing the expectation in this test: 
https://github.com/apache/spark/blob/master/sql/core/src/test/scala/org/apache/spark/sql/DatasetSuite.scala#L715-L722
 
   It seems to encode the value as `KryoData` correctly. I can even `.show` the 
DataFrame, however, when collecting the rows, I get a `null` row. Could you 
please give me a hint where to look?

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