docs: public void updateMetadata(String tableName, String metadata){
  		try {
  			updateStatement.setString(1, metadata);
  			updateStatement.setLong(2, tableName.hashCode());
  			updateStatement.executeUpdate();
  		} catch (SQLException e) {
  			throw new BackendException("Could not update metadata for table '" + tableName + "'", e);
  		}
  	}