Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/14425#discussion_r72895137
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileSourceStrategy.scala
---
@@ -130,7 +130,9 @@ private[sql] object FileSourceStrategy extends Strategy
with Logging {
createNonBucketedReadRDD(readFile, selectedPartitions,
fsRelation)
}
+ // These metadata values make scan plans uniquely identifiable for
equality checking.
val meta = Map(
--- End diff --
not related to this pr - i think we should remove the concept of metadata
entirely from physical plans. It is something added as a hack to propagate the
following information, which really should just be a named field in those case
classes.
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