maropu commented on a change in pull request #29045:
URL: https://github.com/apache/spark/pull/29045#discussion_r453103816



##########
File path: 
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/orc/OrcColumnarBatchReaderSuite.scala
##########
@@ -77,4 +77,64 @@ class OrcColumnarBatchReaderSuite extends QueryTest with 
SharedSparkSession {
       assert(p1.getUTF8String(0) === partitionValues.getUTF8String(0))
     }
   }
+
+  test("SPARK-32234: orc data created by the hive tables having _col fields 
name") {
+    var error: Throwable = null
+    withTable("test_date_hive_orc") {
+      spark.sql(
+        """
+          |CREATE TABLE `test_date_hive_orc`
+          | (`_col1` INT,`_col2` STRING,`_col3` INT)
+          |  USING orc
+        """.stripMargin)
+      spark.sql(
+        """insert into
+          | test_date_hive_orc
+          |  values(9, '12', 2020)
+        """.stripMargin)
+      try {
+        val df = spark.sql("select _col2 from test_date_hive_orc")
+        checkAnswer(df, Row("12"))
+      } catch {
+        case e: Throwable =>
+          error = e
+      }
+      assert(error == null)
+      spark.sql(
+        s"""
+           |DROP TABLE IF

Review comment:
       you don't need to drop the table. Please see the implementation of 
`withTable`.

##########
File path: 
sql/core/src/test/scala/org/apache/spark/sql/execution/datasources/orc/OrcColumnarBatchReaderSuite.scala
##########
@@ -77,4 +77,64 @@ class OrcColumnarBatchReaderSuite extends QueryTest with 
SharedSparkSession {
       assert(p1.getUTF8String(0) === partitionValues.getUTF8String(0))
     }
   }
+
+  test("SPARK-32234: orc data created by the hive tables having _col fields 
name") {
+    var error: Throwable = null
+    withTable("test_date_hive_orc") {
+      spark.sql(
+        """
+          |CREATE TABLE `test_date_hive_orc`
+          | (`_col1` INT,`_col2` STRING,`_col3` INT)
+          |  USING orc
+        """.stripMargin)
+      spark.sql(
+        """insert into
+          | test_date_hive_orc
+          |  values(9, '12', 2020)
+        """.stripMargin)
+      try {
+        val df = spark.sql("select _col2 from test_date_hive_orc")
+        checkAnswer(df, Row("12"))
+      } catch {
+        case e: Throwable =>
+          error = e
+      }
+      assert(error == null)
+      spark.sql(
+        s"""
+           |DROP TABLE IF

Review comment:
       You don't need to drop the table. Please see the implementation of 
`withTable`.




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