Bug#24667  After ALTER TABLE operation ndb_dd table becomes regular ndb, Bug #25296  Truncate table converts NDB disk based tables to in-memory tables: Check table storage before creating columns


sql/ha_ndbcluster.cc:
  #24667  After ALTER TABLE operation ndb_dd table becomes regular ndb, Bug #25296  Truncate table converts NDB disk based tables to in-memory tables: Check table storage before creating columns