fix(chart-filter): Avoid column denormalization if not enabled (#26199)

(cherry picked from commit 05d7060)

superset/datasource/api.py

@@ -115,9 +115,12 @@ def get_column_values(
             return self.response(403, message=ex.message)
 
         row_limit = apply_max_row_limit(app.config["FILTER_SELECT_ROW_LIMIT"])
+        denormalize_column = not datasource.normalize_columns
         try:
             payload = datasource.values_for_column(
-                column_name=column_name, limit=row_limit
+                column_name=column_name,
+                limit=row_limit,
+                denormalize_column=denormalize_column,
             )
             return self.response(200, result=payload)
         except KeyError:

superset/models/helpers.py

@@ -1331,14 +1331,19 @@ def get_time_filter(  # pylint: disable=too-many-arguments
             )
         return and_(*l)
 
-    def values_for_column(self, column_name: str, limit: int = 10000) -> list[Any]:
-        # always denormalize column name before querying for values
+    def values_for_column(
+        self, column_name: str, limit: int = 10000, denormalize_column: bool = False
+    ) -> list[Any]:
+        # denormalize column name before querying for values
+        # unless disabled in the dataset configuration
         db_dialect = self.database.get_dialect()
-        denormalized_col_name = self.database.db_engine_spec.denormalize_name(
-            db_dialect, column_name
+        column_name_ = (
+            self.database.db_engine_spec.denormalize_name(db_dialect, column_name)
+            if denormalize_column
+            else column_name
         )
         cols = {col.column_name: col for col in self.columns}
-        target_col = cols[denormalized_col_name]
+        target_col = cols[column_name_]
         tp = self.get_template_processor()
         tbl, cte = self.get_from_clause(tp)