message: Allow LIMIT to be specified in parameters
diff: @@ -2558,10 +2558,8 @@ class Superset(BaseSupersetView):
  )
  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',
  @@ -2591,6 +2589,10 @@ class Superset(BaseSupersetView):
  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')
  