Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/993#discussion_r15333936
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkPlan.scala ---
@@ -18,22 +18,53 @@
package org.apache.spark.sql.execution
import org.apache.spark.annotation.DeveloperApi
+import org.apache.spark.Logging
import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{Logging, Row}
+import org.apache.spark.sql.{SQLContext, Row}
import org.apache.spark.sql.catalyst.trees
import org.apache.spark.sql.catalyst.analysis.MultiInstanceRelation
-import org.apache.spark.sql.catalyst.expressions.GenericRow
+import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.expressions.codegen._
import org.apache.spark.sql.catalyst.plans.QueryPlan
import org.apache.spark.sql.catalyst.plans.logical.BaseRelation
import org.apache.spark.sql.catalyst.plans.physical._
+
+object SparkPlan {
+ protected[sql] val currentContext = new ThreadLocal[SQLContext]()
+}
+
/**
* :: DeveloperApi ::
*/
@DeveloperApi
-abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging {
+abstract class SparkPlan extends QueryPlan[SparkPlan] with Logging with
Serializable {
self: Product =>
+ /**
+ * A handle to the SQL Context that was used to create this plan.
Since many operators need
+ * access to the sqlContext for RDD operations or configuration this
field is automatically
+ * populated by the query planning infrastructure.
+ */
+ @transient
+ protected val sqlContext = SparkPlan.currentContext.get()
+
+ protected def sparkContext = sqlContext.sparkContext
+
+ def logger = log
+
+ val codegenEnabled: Boolean = if(sqlContext != null) {
--- End diff --
when is context null?
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