SNOW-2362488: Improve the error message of XSD validation when mode=failfast (#3810)

Author: sfc-gh-jdu

CHANGELOG.md

@@ -87,6 +87,7 @@
 #### Improvements
 
 - Improved `DataFrameReader.dbapi` (PuPr) reading performance by setting the default `fetch_size` parameter value to 100000.
+- Improved error message for XSD validation failure when reading XML files using `session.read.option('rowValidationXSDPath', <xsd_path>).xml(<stage_file_path>)`.
 
 ### Snowpark pandas API Updates
 

src/snowflake/snowpark/_internal/xml_reader.py

@@ -503,7 +503,8 @@ def process_xml_range(
                     yield {column_name_of_corrupt_record: record_str}
                 elif mode == "FAILFAST":
                     raise RuntimeError(
-                        f"Malformed XML record at bytes {record_start}-{record_end}: {e}"
+                        f"Malformed XML record at bytes {record_start}-{record_end}: {e}\n"
+                        f"XML record string: {record_str}"
                     )
 
             if record_end > approx_end:

tests/integ/test_xml_reader_row_tag.py

@@ -416,3 +416,11 @@ def test_read_xml_row_validation_xsd_path(session):
     assert result[0]["'price'"] == '"44.95"'
     assert result[0]["'publish_date'"] == '"2000-10-01"'
     assert result[0]["'_id'"] == '"bk101"'
+
+
+def test_read_xml_row_validation_xsd_path_failfast(session):
+    row_tag = "book"
+    with pytest.raises(SnowparkSQLException, match="XML record string:"):
+        session.read.option("rowTag", row_tag).option(
+            "rowValidationXSDPath", f"@{tmp_stage_name}/{test_file_books_xsd}"
+        ).option("mode", "failfast").xml(f"@{tmp_stage_name}/{test_file_books_xml}")