From 0b00c8f6fd908868e52519b9b7bac449b1182d21 Mon Sep 17 00:00:00 2001
From: Akash Nayar <akashknayar5@gmail.com>
Date: Fri, 24 Apr 2026 16:08:45 +0000
Subject: [PATCH] [SPARK] Strengthen array_position collation coverage

---
 .../spark/sql/collation/CollationSuite.scala       | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/sql/core/src/test/scala/org/apache/spark/sql/collation/CollationSuite.scala b/sql/core/src/test/scala/org/apache/spark/sql/collation/CollationSuite.scala
index 1e9dcdf5854b4..d0efde8e11b18 100644
--- a/sql/core/src/test/scala/org/apache/spark/sql/collation/CollationSuite.scala
+++ b/sql/core/src/test/scala/org/apache/spark/sql/collation/CollationSuite.scala
@@ -2724,4 +2724,18 @@ class CollationSuite extends DatasourceV2SQLBase with AdaptiveSparkPlanHelper {
     }
   }
 
+  test("array_position respects schema-level non-binary collation") {
+    val q =
+      """SELECT array_position(a, 'HELLO') AS pos
+        |FROM (
+        |  SELECT CAST(array(
+        |           CASE id WHEN 0 THEN 'hello'
+        |                   WHEN 1 THEN 'HELLO'
+        |                   ELSE 'world'
+        |           END
+        |         ) AS ARRAY<STRING COLLATE UTF8_LCASE>) AS a
+        |  FROM range(3)
+        |)""".stripMargin
+    checkAnswer(sql(q), Seq(Row(1L), Row(1L), Row(0L)))
+  }
 }