Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/16347
@junegunn Can you check the query plan of hive for `INSERT OVERWRITE TABLE
... DISTRIBUTE BY ... SORT BY ...`?
In Spark SQL, the query plan looks like
```
'InsertIntoTable `table1`
+- 'Sort ['j ASC NULLS FIRST], false
+- 'RepartitionByExpression ['i], 200
+- table
```
The sort happens before the insertion, this explains why Spark doesn't
preserve the sort order. If in hive the sort is included in insertion, we
should follow that.
In the meanwhile, the behavior of DataFrameWriter looks reasonable(need to
fix the document of `sortWithinPartitions `), but we should add new API to
allow users specify sort ordering during writing, to be consistent with SQL API.
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