Github user viirya commented on a diff in the pull request: https://github.com/apache/spark/pull/19508#discussion_r145588024 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/compression/compressionSchemes.scala --- @@ -495,6 +474,8 @@ private[columnar] case object DictionaryEncoding extends CompressionScheme { columnType.dataType match { case _: IntegerType => val dictionaryIds = columnVector.reserveDictionaryIds(capacity) + val intDictionary = dictionary.map(_.asInstanceOf[Int]) --- End diff -- Thanks @kiszk. I checked the comment and code and reverted this change.
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