@Override
  public List<FieldSchema> readSchema(Table tbl, EnvironmentContext envContext,
                                      Configuration conf) throws MetaException {
    throw new UnsupportedOperationException("Storage schema reading not supported");
  }
Default StorageSchemaReader.  This just throws as the metastore currently doesn't know how to
read schemas from storage.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/DefaultStorageSchemaReader.java