*
* @param data 要处理的数据
* @return 最终的处理结果
*/
private ArrayList<LinkedHashMap<String, Object>> preProcess(ArrayList<LinkedHashMap<String, Object>> data) {
groupHistogram = new ColumnGroup(HISTOGRAM);
groupEffectedRowCountHistogram = new ColumnGroup(Effected_RowCount_HISOGRAM);
groupExecuteAndResultHoldTimeHistogram = new ColumnGroup(ExecuteAndResult_Hold_HISOGRAM);
groupFetchRowCountHistogram = new ColumnGroup(FetchRowCount_HISOGRAM);
listHistogram = new ArrayList<Integer>();
listEffectedRowCountHistogram = new ArrayList<Integer>();
listExecuteAndResultHoldTimeHistogram = new ArrayList<Integer>();
listFetchRowCountHistogram = new ArrayList<Integer>();
ids = new ArrayList<String>();