try {
this.conf = conf;
db = Hive.get(conf);
rootTasks = new ArrayList<Task<? extends Serializable>>();
LOG = LogFactory.getLog(this.getClass().getName());
console = new LogHelper(LOG);
this.idToTableNameMap = new HashMap<String, String>();
} catch (Exception e) {
throw new SemanticException (e);
}
}