Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/2381#discussion_r17513662
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala ---
@@ -166,3 +166,24 @@ 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)(
+ @transient context: SQLContext)
+ extends LeafNode with Command {
+
+ override protected[sql] lazy val sideEffectResult = {
+ context.catalog.registerTable(None, tableName,
sqlContext.executePlan(plan).analyzed)
+ context.cacheTable(tableName)
+ //It does the caching eager.
+ //TODO : Does it really require to collect?
--- End diff --
I'd do a `count()` instead of a `collect()`.
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