Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18714#discussion_r128911351
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -881,6 +881,16 @@ object SQLConf {
.intConf
.createWithDefault(10000)
+ val HIVE_STYLE_PARTITION_OVERWRITE =
+ buildConf("spark.sql.hiveStylePartitionOverwrite")
+ .doc("When insert overwrite a partitioned table with dynamic
partition columns, Spark " +
+ "will follow Hive's behavior if this config is enabled, i.e., only
delete partition " +
+ "directories which have data written into it. By default this
config is disabled " +
+ "to keep the previous behavior, which means Spark will delete all
partition directories " +
+ "that match the static partition values provided in the insert
statement.")
+ .booleanConf
+ .createWithDefault(false)
--- End diff --
Could we turn this `true` and show how many existing test cases failed?
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