List dbConnections,
Connection dbConnection,
  public PrepareDerivedTables(int id, int runID, 			      DBConfig dbConfig,			      //Connection dbConnection,			      List dbConnections,			      DerivedTablesConfig dtConfig,			      Logger logger){    super(id,runID,dbConfig,(Connection)dbConnections.get(0),logger);    this.dtConfig=dtConfig;    for(int i=0;i<buildTable.length;i++)      buildTable[i]=false;    workQ = new WorkQueue(logger, this);    this.dbConnections = dbConnections;  }