cloud-fan commented on code in PR #38924:
URL: https://github.com/apache/spark/pull/38924#discussion_r1041775153
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sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/BatchScanExec.scala:
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@@ -114,8 +117,21 @@ case class BatchScanExec(
// return an empty RDD with 1 partition if dynamic filtering removed the
only split
sparkContext.parallelize(Array.empty[InternalRow], 1)
} else {
+ var finalPartitions = filteredPartitions
+
+ outputPartitioning match {
+ case p: KeyGroupedPartitioning =>
+ val partitionMapping = finalPartitions.map(s =>
+ s.head.asInstanceOf[HasPartitionKey].partitionKey() -> s).toMap
+ finalPartitions = p.partitionValuesOpt.get.map { partKey =>
Review Comment:
It's better to centralize the related code.
This empty filling is quite related to the `if (oldRows.size <
newRows.size)` check. We should put them together if possible
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