SNOW-2221567: Fix pd.read_excel bug when reading files inside stage inner directory (#3579)

Author: sfc-gh-helmeleegy

CHANGELOG.md

@@ -49,7 +49,7 @@
 #### Bug Fixes
 
 - Added an upper bound to the row estimation when the cartesian product from an align or join results in a very large number. This mitigates a performance regression.
-
+- Fix a `pd.read_excel` bug when reading files inside stage inner directory.
 
 ## 1.34.0 (2025-07-15)
 

src/snowflake/snowpark/modin/plugin/io/snow_io.py

@@ -173,7 +173,7 @@ def _file_from_stage(filepath_or_buffer):
     with tempfile.TemporaryDirectory() as local_temp_dir:
         session.file.get(filepath_or_buffer, local_temp_dir)
         _, stripped_filepath = extract_stage_name_and_prefix(filepath_or_buffer)
-        yield os.path.join(local_temp_dir, stripped_filepath)
+        yield os.path.join(local_temp_dir, os.path.basename(stripped_filepath))
 
 
 class PandasOnSnowflakeIO(BaseIO):

tests/integ/modin/io/test_read_excel.py

@@ -55,3 +55,24 @@ def test_read_excel_from_stage(session, resources_path):
             native_pd.read_excel(filename),
             check_dtype=False,
         )
+
+
+def test_read_excel_from_stage_inner_directory(session, resources_path):
+    test_files = TestFiles(resources_path)
+
+    filename = test_files.test_file_excel
+
+    stage_name = Utils.random_stage_name()
+    Utils.create_stage(session, stage_name, is_temporary=True)
+
+    # Upload file to inner directory in stage
+    inner_dir = "data/excel_files"
+    stage_path_with_dir = f"@{stage_name}/{inner_dir}"
+    Utils.upload_to_stage(session, stage_path_with_dir, filename, compress=False)
+
+    with SqlCounter(query_count=2):
+        assert_frame_equal(
+            pd.read_excel(f"@{stage_name}/{inner_dir}/{os.path.basename(filename)}"),
+            native_pd.read_excel(filename),
+            check_dtype=False,
+        )