dongjoon-hyun commented on issue #27179: [SPARK-30492][SQL] Eliminate deprecation warnings in ORC datasource URL: https://github.com/apache/spark/pull/27179#issuecomment-573462060 Historically, `org.apache.spark.sql.hive.orc.OrcFileFormat` was using the the built-in ORC of Hive 1.2.1 module. And, we decided to keep it with Hive 1.2.1. `org.apache.spark.sql.execution.datasources.orc.OrcFileFormat` is the one which is using Apache ORC library. So, with `-Phive1.2` profile, the above is still same. The difference can be everything, but the main difference was ORC Filter classes.
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