Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/20610#discussion_r168267722
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -399,11 +399,11 @@ object SQLConf {
val ORC_IMPLEMENTATION = buildConf("spark.sql.orc.impl")
.doc("When native, use the native version of ORC support instead of
the ORC library in Hive " +
- "1.2.1. It is 'hive' by default prior to Spark 2.3.")
+ "1.2.1. It is 'hive' by default.")
.internal()
.stringConf
.checkValues(Set("hive", "native"))
- .createWithDefault("native")
+ .createWithDefault("hive")
--- End diff --
We also need to disable the ORC pushdown, because the ORC reader of Hive
1.2.1 has a few bugs.
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