dongjoon-hyun commented on a change in pull request #23582: [SPARK-26661][SQL]
Show actual class name of the writing command in CTAS explain
URL: https://github.com/apache/spark/pull/23582#discussion_r249238262
##########
File path:
sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateHiveTableAsSelectCommand.scala
##########
@@ -83,10 +84,14 @@ trait CreateHiveTableAsSelectBase extends
DataWritingCommand {
tableDesc: CatalogTable,
tableExists: Boolean): DataWritingCommand
+ // A subclass should override this with the Class of the concrete type
expected to be
+ // returned from `getWritingCommand`.
+ def writingCommandClass: Class[_]
Review comment:
@rednaxelafx . Do we need to return the class itself? Can we simply return
`String` instead of `Class[_]` because we require only `name` and don't use the
class actually.
```scala
- def writingCommandClass: Class[_]
+ def writingCommandClassName: String
```
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