Update deprecated functions to use stable functions (#50275)

Co-authored-by: Elad Kalif <45845474+eladkal@users.noreply.github.com>

Author: guan404ming

providers/common/sql/src/airflow/providers/common/sql/hooks/sql.py

@@ -399,7 +399,7 @@ def get_pandas_df(
         :param parameters: The parameters to render the SQL query with.
         :param kwargs: (optional) passed into pandas.io.sql.read_sql method
         """
-        return self._get_pandas_df(sql, parameters, **kwargs)
+        return self.get_df(sql, parameters, df_type="pandas", **kwargs)
 
     @deprecated(
         reason="Replaced by function `get_df_by_chunks`.",
@@ -414,7 +414,7 @@ def get_pandas_df_by_chunks(
         chunksize: int,
         **kwargs,
     ) -> Generator[PandasDataFrame, None, None]:
-        return self._get_pandas_df_by_chunks(sql, parameters, chunksize=chunksize, **kwargs)
+        return self.get_df_by_chunks(sql, parameters, chunksize=chunksize, df_type="pandas", **kwargs)
 
     @overload
     def get_df(

providers/common/sql/tests/unit/common/sql/hooks/test_sql.py

@@ -313,11 +313,16 @@ def test_uri_with_schema(self):
     @pytest.mark.parametrize(
         "df_type, expected_type",
         [
+            ("test_default_df_type", pd.DataFrame),
             ("pandas", pd.DataFrame),
             ("polars", pl.DataFrame),
         ],
     )
     def test_get_df_with_df_type(db, df_type, expected_type):
         dbapi_hook = mock_db_hook(DbApiHook)
-        df = dbapi_hook.get_df("SQL", df_type=df_type)
-        assert isinstance(df, expected_type)
+        if df_type == "test_default_df_type":
+            df = dbapi_hook.get_df("SQL")
+            assert isinstance(df, pd.DataFrame)
+        else:
+            df = dbapi_hook.get_df("SQL", df_type=df_type)
+            assert isinstance(df, expected_type)