Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/18714#discussion_r128919766 --- 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 -- a lot of tests will fail because we explicitly assert the old behavior, but I can try
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