Github user dongjoon-hyun commented on the issue: https://github.com/apache/spark/pull/19571 Thank you for review, @viirya and @HyukjinKwon . You know that I tried to introduce new OrcFileFormat in `sql/core` before. But, it is too big for review. According to @cloud-fan 's advice, I'm trying to upgrade the existing one by one in a piece. So far, - We introduced new ORC 1.4.1 dependency - Introduce new Spark SQL ORC parameters and replace Hive constant with new ORC parameters. This is the actual first PR to use read and write using ORC 1.4.1 library. - It reads ORC file only for inferencing schema. - It writes only empty ORC file.
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