Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/2397#discussion_r17648914
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/commands.scala ---
@@ -166,3 +166,20 @@ 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)
--- End diff --
(Probably my final comment on this PR :) )
As described in PR #2382, we shouldn't store analyzed logical plan when
registering tables any more (see
[here](https://github.com/apache/spark/pull/2382/files?diff=split#diff-5)).
To prevent duplicated code, I'd suggest to import `SQLContext._` so that we
can leverage [the implicit
conversion](https://github.com/apache/spark/blob/008a5ed4808d1467b47c1d6fa4d950cc6c4976b7/sql/core/src/main/scala/org/apache/spark/sql/SQLContext.scala#L78-L85)
from `LogicalPlan` to `SchemaRDD`, and then simply do this:
```scala
sqlContext.executePlan(plan).logical.registerTempTable(tableName)
```
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