update

Author: 云峤

sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala

@@ -20,31 +20,33 @@ package org.apache.spark.sql
 import java.io.CharArrayWriter
 import java.sql.DriverManager
 
+
+import scala.collection.JavaConversions._
+import scala.language.implicitConversions
+import scala.reflect.ClassTag
+import scala.reflect.runtime.universe.TypeTag
+import scala.util.control.NonFatal
+
 import com.fasterxml.jackson.core.JsonFactory
+
 import org.apache.commons.lang3.StringUtils
 import org.apache.spark.annotation.{DeveloperApi, Experimental}
 import org.apache.spark.api.java.JavaRDD
 import org.apache.spark.api.python.SerDeUtil
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.catalyst.analysis.{ResolvedStar, UnresolvedAttribute, UnresolvedRelation}
+import org.apache.spark.storage.StorageLevel
+import org.apache.spark.sql.catalyst.{CatalystTypeConverters, ScalaReflection, SqlParser}
+import org.apache.spark.sql.catalyst.analysis.{UnresolvedAttribute, UnresolvedRelation, ResolvedStar}
 import org.apache.spark.sql.catalyst.expressions._
+import org.apache.spark.sql.catalyst.plans.{JoinType, Inner}
 import org.apache.spark.sql.catalyst.plans.logical._
-import org.apache.spark.sql.catalyst.plans.{Inner, JoinType}
-import org.apache.spark.sql.catalyst.{CatalystTypeConverters, ScalaReflection, SqlParser}
 import org.apache.spark.sql.execution.{EvaluatePython, ExplainCommand, LogicalRDD}
 import org.apache.spark.sql.jdbc.JDBCWriteDetails
 import org.apache.spark.sql.json.JsonRDD
-import org.apache.spark.sql.sources.{CreateTableUsingAsSelect, ResolvedDataSource}
 import org.apache.spark.sql.types._
-import org.apache.spark.storage.StorageLevel
+import org.apache.spark.sql.sources.{ResolvedDataSource, CreateTableUsingAsSelect}
 import org.apache.spark.util.Utils
 
-import scala.collection.JavaConversions._
-import scala.language.implicitConversions
-import scala.reflect.ClassTag
-import scala.reflect.runtime.universe.TypeTag
-import scala.util.control.NonFatal
-
 
 private[sql] object DataFrame {
   def apply(sqlContext: SQLContext, logicalPlan: LogicalPlan): DataFrame = {