ammarchalifah commented on code in PR #59599:
URL: https://github.com/apache/spark/pull/59599#discussion_r4377528632
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sql/core/src/main/scala/org/apache/spark/sql/execution/KeyGroupedPartitionedScan.scala:
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@@ -18,13 +18,51 @@
package org.apache.spark.sql.execution
import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.RowOrdering
+import org.apache.spark.sql.catalyst.expressions.{Expression, RowOrdering}
import org.apache.spark.sql.catalyst.plans.physical.{KeyGroupedPartitioning,
KeyGroupedShuffleSpec}
import org.apache.spark.sql.catalyst.util.InternalRowComparableWrapper
import org.apache.spark.sql.execution.joins.StoragePartitionJoinParams
/** Base trait for a data source scan capable of producing a key-grouped
output. */
trait KeyGroupedPartitionedScan[T] {
+ /**
+ * Return join-key positions for `outputPartitioning`.
[[getInputPartitionGrouping]] always
+ * uses `spjParams.joinKeyPositions`. Skip output projection for a
leading-prefix subset of
+ * partition keys when common-partition metadata remains at full width;
projecting output
+ * misaligns nested siblings in a
+ * [[org.apache.spark.sql.catalyst.plans.physical.PartitioningCollection]].
+ */
+ private def joinKeyPositionsForOutput(
+ spjParams: StoragePartitionJoinParams,
+ baseExpressions: Seq[Expression]): Option[Seq[Int]] = {
+ spjParams.joinKeyPositions match {
+ case Some(pos) if pos.length < baseExpressions.length &&
Review Comment:
Addressed
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