Github user ericl commented on a diff in the pull request:
https://github.com/apache/spark/pull/16088#discussion_r90539169
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
---
@@ -687,13 +687,14 @@ class SessionCatalog(
tableName: TableIdentifier,
specs: Seq[TablePartitionSpec],
ignoreIfNotExists: Boolean,
- purge: Boolean): Unit = {
+ purge: Boolean,
+ retainData: Boolean): Unit = {
--- End diff --
It seemed a little safer to make it mandatory to avoid some component
forgetting to propagate it.
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