use stronger typing in convert_value (object instead of Any)

Signed-off-by: varun-edachali-dbx <varun.edachali@databricks.com>

Author: varun-edachali-dbx

src/databricks/sql/backend/sea/utils/conversion.py

@@ -9,7 +9,7 @@
 import decimal
 import logging
 from dateutil import parser
-from typing import Any, Callable, Dict, Optional, Union
+from typing import Callable, Dict, Optional
 
 logger = logging.getLogger(__name__)
 
@@ -129,7 +129,7 @@ def convert_value(
         value: str,
         sql_type: str,
         **kwargs,
-    ) -> Any:
+    ) -> object:
         """
         Convert a string value to the appropriate Python type based on SQL type.
 
@@ -142,9 +142,6 @@ def convert_value(
             The converted value in the appropriate Python type
         """
 
-        if value is None:
-            return None
-
         sql_type = sql_type.lower().strip()
 
         if sql_type not in SqlTypeConverter.TYPE_MAPPING:

tests/unit/test_sea_conversion.py

@@ -15,12 +15,6 @@
 class TestSqlTypeConverter:
     """Test suite for the SqlTypeConverter class."""
 
-    def test_convert_value_null(self):
-        """Test converting null values."""
-        assert SqlTypeConverter.convert_value(None, SqlType.INT) is None
-        assert SqlTypeConverter.convert_value(None, SqlType.STRING) is None
-        assert SqlTypeConverter.convert_value(None, SqlType.BOOLEAN) is None
-
     def test_convert_numeric_types(self):
         """Test converting numeric types."""
         # Test integer types