[SPARK-14488][SPARK-14493][SQL] "CREATE TEMPORARY TABLE ... USING ...…

… AS SELECT" shouldn't create persisted table

## What changes were proposed in this pull request?

When planning logical plan node `CreateTableUsingAsSelect`, we neglected its `temporary` field and always generates a `CreateMetastoreDataSourceAsSelect`. This PR fixes this issue generating `CreateTempTableUsingAsSelect` when `temporary` is true.

This PR also fixes SPARK-14493 since the root cause of SPARK-14493 is that we were `CreateMetastoreDataSourceAsSelect` uses default Hive warehouse location when `PATH` data source option is absent.

## How was this patch tested?

Added a test case to create a temporary table using the target syntax and check whether it's indeed a temporary table.

Author: Cheng Lian <lian@databricks.com>

Closes #12303 from liancheng/spark-14488-fix-ctas-using.

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

@@ -23,9 +23,8 @@ import org.apache.spark.sql.catalyst.planning._
 import org.apache.spark.sql.catalyst.plans._
 import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
 import org.apache.spark.sql.execution._
-import org.apache.spark.sql.execution.command.{DescribeCommand => RunnableDescribeCommand, _}
-import org.apache.spark.sql.execution.datasources.{CreateTableUsing, CreateTableUsingAsSelect,
-  DescribeCommand}
+import org.apache.spark.sql.execution.command.{DescribeCommand => _, _}
+import org.apache.spark.sql.execution.datasources.{CreateTableUsing, CreateTableUsingAsSelect, CreateTempTableUsingAsSelect, DescribeCommand}
 import org.apache.spark.sql.hive.execution._
 
 private[hive] trait HiveStrategies {
@@ -90,6 +89,11 @@ private[hive] trait HiveStrategies {
             tableIdent, userSpecifiedSchema, provider, opts, allowExisting, managedIfNoPath)
         ExecutedCommand(cmd) :: Nil
 
+      case c: CreateTableUsingAsSelect if c.temporary =>
+        val cmd = CreateTempTableUsingAsSelect(
+          c.tableIdent, c.provider, c.partitionColumns, c.mode, c.options, c.child)
+        ExecutedCommand(cmd) :: Nil
+
       case c: CreateTableUsingAsSelect =>
         val cmd = CreateMetastoreDataSourceAsSelect(c.tableIdent, c.provider, c.partitionColumns,
           c.bucketSpec, c.mode, c.options, c.child)

sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/SQLQuerySuite.scala

@@ -19,12 +19,9 @@ package org.apache.spark.sql.hive.execution
 
 import java.sql.{Date, Timestamp}
 
-import scala.collection.JavaConverters._
-
 import org.apache.spark.sql._
 import org.apache.spark.sql.catalyst.TableIdentifier
 import org.apache.spark.sql.catalyst.analysis.{EliminateSubqueryAliases, FunctionRegistry}
-import org.apache.spark.sql.catalyst.parser.ParseException
 import org.apache.spark.sql.execution.datasources.LogicalRelation
 import org.apache.spark.sql.functions._
 import org.apache.spark.sql.hive.{HiveContext, MetastoreRelation}
@@ -1852,4 +1849,50 @@ class SQLQuerySuite extends QueryTest with SQLTestUtils with TestHiveSingleton {
       }
     }
   }
+
+  test(
+    "SPARK-14488 \"CREATE TEMPORARY TABLE ... USING ... AS SELECT ...\" " +
+    "shouldn't create persisted table"
+  ) {
+    withTempPath { dir =>
+      withTempTable("t1", "t2") {
+        val path = dir.getCanonicalPath
+        val ds = sqlContext.range(10)
+        ds.registerTempTable("t1")
+
+        sql(
+          s"""CREATE TEMPORARY TABLE t2
+             |USING PARQUET
+             |OPTIONS (PATH '$path')
+             |AS SELECT * FROM t1
+           """.stripMargin)
+
+        checkAnswer(
+          sqlContext.tables().select('isTemporary).filter('tableName === "t2"),
+          Row(true)
+        )
+
+        checkAnswer(table("t2"), table("t1"))
+      }
+    }
+  }
+
+  test(
+    "SPARK-14493 \"CREATE TEMPORARY TABLE ... USING ... AS SELECT ...\" " +
+    "shouldn always be used together with PATH data source option"
+  ) {
+    withTempTable("t") {
+      sqlContext.range(10).registerTempTable("t")
+
+      val message = intercept[IllegalArgumentException] {
+        sql(
+          s"""CREATE TEMPORARY TABLE t1
+             |USING PARQUET
+             |AS SELECT * FROM t
+           """.stripMargin)
+      }.getMessage
+
+      assert(message == "'path' is not specified")
+    }
+  }
 }