Github user jaceklaskowski commented on a diff in the pull request:
https://github.com/apache/spark/pull/14322#discussion_r71992661
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileSourceStrategy.scala
---
@@ -135,9 +135,17 @@ private[sql] object FileSourceStrategy extends
Strategy with Logging {
PUSHED_FILTERS -> pushedDownFilters.mkString("[", ", ", "]"),
INPUT_PATHS -> fsRelation.location.paths.mkString(", "))
+ // If the required attributes does not have the partitioning
columns, we do not need
+ // to scan the partitioning columns. If partitioning columns are
selected, the column order
+ // of partitionColumns is fixed in rdd. Thus, we always scan all the
partitioning columns.
+ val scannedColumns = if
(requiredAttributes.intersect(partitionSet).nonEmpty) {
--- End diff --
What do you think about `map` and `getOrElse`?
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