informix循环查询为什么老是锁表

informix循环查询为何老是锁表
public void copyCardTemp(Map dataMap,String id) throws Exception {
         String idCondition = TbDpTemplate.TEMPLATE_ID.toSqlEQ(id);
         Map tempMap = BizDB.getOneRowAsMap(TbDpTemplate.TABLE, idCondition);
         Connection conn = BizDB.getConn() ;
try {
                //复制模板
String condition = TbDpTemplate.TEMPLATE_NO.toSqlEQ(dataMap.get(TbDpTemplate.TEMPLATE_NO.name));
Integer count = BizDB.getCount(TbDpTemplate.TABLE, condition);
if (count > 0)
                {
                    throw new Exception("卡模板号已经存在");
}
long templateId = SequenceGen.getInstance().nextValue(TbDpTemplate.TABLE);
                dataMap.put(TbDpTemplate.TEMPLATE_ID.name, templateId);
                dataMap.put(TbDpTemplate.CREATE_DATE.name, new Date());
                dataMap.put(TbDpTemplate.BANK_ID.name, Constants.FLAG_PUBDATA_ORG);
                try
                {
                    BizDB.insert(conn,TbDpTemplate.TABLE, dataMap);
                } catch (Exception e)
                {
                    LogProcess.error(this.getClass(), "复制卡模板错误信息-" + e.getMessage());
                    throw new Exception("卡模板复制出错："+e.getMessage());
                }
                //复制模板对应的数据项
                try
                {
                    //查出该模板对应的应用list
                    String appList = tempMap.get(TbDpTemplate.APP_LIST.name).toString();
                    String []listTemp = appList.split(",");
                    for(int i=0;i<listTemp.length;i++)
                    {
                        //查数据项表中apptype对应该模板应用的所有记录
                        String typeCondition = TbDpTempDateApp.APP_TYPE.toSqlEQ(listTemp[i]);
                        String tempIdCondition = TbDpTempDateApp.TEMPLATE_ID.toSqlEQ(id);
                        String addCondition = typeCondition+" and "+tempIdCondition;
                        List itemList = BizDB.searchAsMapList(TbDpTempDateApp.TABLE, addCondition);
                        
                        for (Iterator iter = itemList.iterator(); iter.hasNext();)
                        {
                            long itemId = SequenceGen.getInstance().nextValue(TbDpTempDateApp.TABLE);
                            //组装数据项map