solve compatability issue

Author: zhzhan

sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveContext.scala

@@ -293,7 +293,7 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) {
 
       proc match {
         case driver: Driver =>
-          val results = new JArrayList[String]
+          val results = HiveShim.createDriverResultsArray
           val response: CommandProcessorResponse = driver.run(cmd)
           // Throw an exception if there is an error in query processing.
           if (response.getResponseCode != 0) {
@@ -303,7 +303,12 @@ class HiveContext(sc: SparkContext) extends SQLContext(sc) {
           driver.setMaxRows(maxRows)
           driver.getResults(results)
           driver.close()
-          results
+          results.map { r =>
+            r match {
+              case s: String => s
+              case o => o.toString
+            }
+          }
         case _ =>
           sessionState.out.println(tokens(0) + " " + cmd_1)
           Seq(proc.run(cmd_1).getResponseCode.toString)

sql/hive/v0.12.0/src/main/scala/org/apache/spark/sql/hive/Shim.scala

@@ -18,6 +18,7 @@
 package org.apache.spark.sql.hive
 
 import java.net.URI
+import java.util.{ArrayList => JArrayList}
 import java.util.Properties
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
@@ -49,14 +50,16 @@ private[hive] object HiveShim {
     new TableDesc(serdeClass, inputFormatClass, outputFormatClass, properties)
   }
 
+  def createDriverResultsArray = new JArrayList[String]
+
   def getStatsSetupConstTotalSize = StatsSetupConst.TOTAL_SIZE
 
-  def createDefaultDBIfNeeded(context: HiveContext) ={  }
+  def createDefaultDBIfNeeded(context: HiveContext) = {  }
 
   /** The string used to denote an empty comments field in the schema. */
   def getEmptyCommentsFieldValue = "None"
 
-  def getCommandProcessor(cmd: Array[String], conf: HiveConf) =  {
+  def getCommandProcessor(cmd: Array[String], conf: HiveConf) = {
     CommandProcessorFactory.get(cmd(0), conf)
   }
 

sql/hive/v0.13.1/src/main/scala/org/apache/spark/sql/hive/Shim.scala

@@ -17,6 +17,7 @@
 
 package org.apache.spark.sql.hive
 
+import java.util.{ArrayList => JArrayList}
 import java.util.Properties
 import org.apache.hadoop.conf.Configuration
 import org.apache.hadoop.fs.Path
@@ -53,17 +54,19 @@ private[hive] object HiveShim {
     new TableDesc(inputFormatClass, outputFormatClass, properties)
   }
 
+  def createDriverResultsArray = new JArrayList[Object]
+
   def getStatsSetupConstTotalSize = StatsSetupConst.TOTAL_SIZE
 
-  def createDefaultDBIfNeeded(context: HiveContext) ={
+  def createDefaultDBIfNeeded(context: HiveContext) = {
     context.runSqlHive("CREATE DATABASE default")
     context.runSqlHive("USE default")
   }
 
   /* The string used to denote an empty comments field in the schema. */
   def getEmptyCommentsFieldValue = ""
 
-  def getCommandProcessor(cmd: Array[String], conf: HiveConf) =  {
+  def getCommandProcessor(cmd: Array[String], conf: HiveConf) = {
     CommandProcessorFactory.get(cmd, conf)
   }