Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20999#discussion_r223753508
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/ddl.scala ---
@@ -521,35 +521,114 @@ case class AlterTableRenamePartitionCommand(
*/
case class AlterTableDropPartitionCommand(
--- End diff --
Shall we make table relation as a child? then we can resolve the
`partitionsFilters` automatically.
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