Github user ravipesala commented on a diff in the pull request:
https://github.com/apache/spark/pull/2390#discussion_r17528595
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala ---
@@ -166,3 +166,22 @@ case class DescribeCommand(child: SparkPlan, output:
Seq[Attribute])(
child.output.map(field => Row(field.name, field.dataType.toString,
null))
}
}
+
+/**
+ * :: DeveloperApi ::
+ */
+@DeveloperApi
+case class CacheTableAsSelectCommand(tableName: String, plan: LogicalPlan)
+ extends LeafNode with Command {
+
+ override protected[sql] lazy val sideEffectResult = {
+ sqlContext.catalog.registerTable(None, tableName,
sqlContext.executePlan(plan).analyzed)
+ sqlContext.cacheTable(tableName)
+ // It does the caching eager.
--- End diff --
Either way is OK. But eager caching is existed only for this feature, so it
may look inconsistent compared to other caching commands.
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