@Override
      protected List<Partition> getSqlResult(GetHelper<List<Partition>> ctx) throws MetaException {
        return directSql.getPartitions(catName, dbName, tblName, args);
      }
Drop an MPartition and cascade deletes (e.g., delete partition privilege grants,
  drop the storage descriptor cleanly, etc.)
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/ObjectStore.java