Allow LIMIT to be specified in parameters (#7052)

superset/views/core.py

@@ -2531,10 +2531,8 @@ def sql_json(self):
             )
 
         client_id = request.form.get('client_id') or utils.shortid()[:10]
-        limits = [mydb.db_engine_spec.get_limit_from_sql(sql), limit]
         query = Query(
             database_id=int(database_id),
-            limit=min(lim for lim in limits if lim is not None),
             sql=sql,
             schema=schema,
             select_as_cta=request.form.get('select_as_cta') == 'true',
@@ -2564,6 +2562,10 @@ def sql_json(self):
             return json_error_response(
                 'Template rendering failed: {}'.format(utils.error_msg_from_exception(e)))
 
+        # set LIMIT after template processing
+        limits = [mydb.db_engine_spec.get_limit_from_sql(rendered_query), limit]
+        query.limit = min(lim for lim in limits if lim is not None)
+
         # Async request.
         if async_:
             logging.info('Running query on a Celery worker')