[SPARK-2041][SQL] Correctly analyze queries where columnName == tableName.

Author: Michael Armbrust <michael@databricks.com>

Closes #985 from marmbrus/tableName and squashes the following commits:

3caaa27 [Michael Armbrust] Correctly analyze queries where columnName == tableName.

2 files changed, 9 insertions, 0 deletions

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
index e2ad3915d3..aa0c426f6f 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
@@ -28,6 +28,12 @@ class SQLQuerySuite extends QueryTest {
   // Make sure the tables are loaded.
   TestData
 
+  test("SPARK-2041 column name equals tablename") {
+    checkAnswer(
+      sql("SELECT tableName FROM tableName"),
+      "test")
+  }
+
   test("index into array") {
     checkAnswer(
       sql("SELECT data, data[0], data[0] + data[1], data[0 + 1] FROM arrayData"),
diff --git a/sql/core/src/test/scala/org/apache/spark/sql/TestData.scala b/sql/core/src/test/scala/org/apache/spark/sql/TestData.scala
index 876bd1636a..05de736bbc 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/TestData.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/TestData.scala
@@ -114,4 +114,7 @@ object TestData {
       NullStrings(2, "ABC") ::
       NullStrings(3, null) :: Nil)
   nullStrings.registerAsTable("nullStrings")
+
+  case class TableName(tableName: String)
+  TestSQLContext.sparkContext.parallelize(TableName("test") :: Nil).registerAsTable("tableName")
 }