Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/13623#discussion_r66884097
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningAwareFileCatalog.scala
---
@@ -96,7 +96,11 @@ abstract class PartitioningAwareFileCatalog(
protected def inferPartitioning(): PartitionSpec = {
// We use leaf dirs containing data files to discover the schema.
- val leafDirs = leafDirToChildrenFiles.keys.toSeq
+ val leafDirs = leafDirToChildrenFiles.filterNot { case (_, files) =>
+ // SPARK-15895: Metadata files (e.g. Parquet summary files) and
temporary files should not be
+ // counted as data files, so that they shouldn't participate
partition discovery.
+ files.forall(f => !isDataPath(f.getPath))
+ }.keys.toSeq
--- End diff --
(I am wondering if using an `exist` inside a `filter` is easier to
understand than using `forall` inside `filterNot?`)
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