Github user omalley commented on a diff in the pull request:
https://github.com/apache/spark/pull/20511#discussion_r167950837
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/orc/OrcSourceSuite.scala
---
@@ -160,6 +160,16 @@ abstract class OrcSuite extends OrcTest with
BeforeAndAfterAll {
}
}
}
+
+ // This is a test case for ORC-285
--- End diff --
After a bit of digging, the problem that ORC-285 fixes was introduced in
HIVE-9711. HIVE-9711 is included in Hive 1.2.0, but doesn't create a problem
unless the vectorized ORC reader is used. That didn't become the default
behavior until HIVE-11417, which was released in Hive 2.1.0. So Spark's other
readers are fine as long as they don't use the vectorized reader.
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