Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/22514#discussion_r227654755
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/CreateHiveTableAsSelectCommand.scala
---
@@ -45,6 +46,11 @@ case class CreateHiveTableAsSelectCommand(
override def run(sparkSession: SparkSession, child: SparkPlan): Seq[Row]
= {
val catalog = sparkSession.sessionState.catalog
+ val metastoreCatalog =
catalog.asInstanceOf[HiveSessionCatalog].metastoreCatalog
+
+ // Whether this table is convertible to data source relation.
+ val isConvertible = metastoreCatalog.isConvertible(tableDesc)
--- End diff --
I feel `CreateHiveTableAsSelectCommand` is not useful. It simply creates
the table first and then call `InsertIntoHiveTable.run`. Maybe we should just
remove it and implement hive table CTAS as `Union(CreateTable,
InsertIntoTable)`.
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