code: private TableDDL createTableDDL(String tableName) {
          TableMetadata tableMetadata = _keyspace.getKeyspaceMetadata().getTable(tableName);
          String rowKeyColumnName = tableMetadata.getPrimaryKey().get(0).getName();
          String timeSeriesColumnName = tableMetadata.getPrimaryKey().get(1).getName();
          String valueColumnName = tableMetadata.getColumns().get(2).getName();
  
          return new TableDDL(tableMetadata, rowKeyColumnName, timeSeriesColumnName, valueColumnName);
      }
docs: Both placement tables -- delta, and delta history -- follow the same DDL.