From 564594f3c8d1d1d109eddd7a13fd210565febdb7 Mon Sep 17 00:00:00 2001
From: Grieve <grieve54706@gmail.com>
Date: Thu, 14 Nov 2024 16:19:43 +0800
Subject: [PATCH] fix(mssql): use nvarchar to avoid non ascii be question mark

---
 ibis/backends/mssql/__init__.py          | 2 +-
 ibis/backends/mssql/tests/test_client.py | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/ibis/backends/mssql/__init__.py b/ibis/backends/mssql/__init__.py
index c640f58e8001..cdaa985ff545 100644
--- a/ibis/backends/mssql/__init__.py
+++ b/ibis/backends/mssql/__init__.py
@@ -328,7 +328,7 @@ def _get_schema_using_query(self, query: str) -> sch.Schema:
           scale,
           error_number,
           error_message
-        FROM sys.dm_exec_describe_first_result_set({tsql}, NULL, 0)
+        FROM sys.dm_exec_describe_first_result_set(N{tsql}, NULL, 0)
         ORDER BY column_ordinal
         """
         with self._safe_raw_sql(query) as cur:
diff --git a/ibis/backends/mssql/tests/test_client.py b/ibis/backends/mssql/tests/test_client.py
index 5db3665027d9..d252ed9d9e29 100644
--- a/ibis/backends/mssql/tests/test_client.py
+++ b/ibis/backends/mssql/tests/test_client.py
@@ -311,3 +311,11 @@ def test_escape_special_characters():
     assert test_func("1bis}Testing!") == "{1bis}}Testing!}"
     assert test_func("{R;3G1/8Al2AniRye") == "{{R;3G1/8Al2AniRye}"
     assert test_func("{R;3G1/8Al2AniRye}") == "{{R;3G1/8Al2AniRye}}}"
+
+
+def test_non_ascii_column_name(con):
+    expr = con.sql("SELECT 1 AS [калона]")
+    schema = expr.schema()
+    names = schema.names
+    assert len(names) == 1
+    assert names[0] == "калона"