From 3093654eeea8ee38b8a047906c9fc18ce5ba8d3f Mon Sep 17 00:00:00 2001
From: Wei-Ting Kuo <waitingkuo0527@gmail.com>
Date: Tue, 2 Aug 2022 01:39:29 +0800
Subject: [PATCH] add a simple test case

---
 datafusion/core/tests/sql/projection.rs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/datafusion/core/tests/sql/projection.rs b/datafusion/core/tests/sql/projection.rs
index 363e96c364c6..71ebde5785a4 100644
--- a/datafusion/core/tests/sql/projection.rs
+++ b/datafusion/core/tests/sql/projection.rs
@@ -335,3 +335,16 @@ fn assert_fields_eq(plan: &LogicalPlan, expected: Vec<&str>) {
         .collect();
     assert_eq!(actual, expected);
 }
+
+#[tokio::test]
+async fn paralleproject_column_with_same_name_as_relationl() -> Result<()> {
+    let ctx = SessionContext::new();
+
+    let sql = "select a.a from (select 1 as a) as a;";
+    let actual = execute_to_batches(&ctx, sql).await;
+
+    let expected = vec!["+---+", "| a |", "+---+", "| 1 |", "+---+"];
+    assert_batches_sorted_eq!(expected, &actual);
+
+    Ok(())
+}