SQL Warning: 17110, SQLState: null

最近写项目遇到这样一个警告。我用的数据库是oracle9i
WARN [http-8088-2] JDBCExceptionReporter.logWarnings(54) | SQL Warning: 17110, SQLState: null
WARN [http-8088-2] JDBCExceptionReporter.logWarnings(55) | Warning: 执行完毕, 但带有警告
程序能够正常执行，但是。如果一次录入多条数据就报错：超出打开游标的最大数

网上有前辈说group by子句有null值。经过不懈努力终于解决问题：原来我在做sum函数的时候，没有处理空值。
我原来的sql语句是这样写的：

select pm.mouse_id as lid,
       pm.monitor_year || '-' || pm.monitor_month as monitortime,
       decode(pm.biotope, '01', '室内', '02', '室外') biotopes,
       z.cnname as county,
       pm.report_unit,
       pmi1.hjs,
       pmi1.xjs,
       pmi1.hxs,
       pmi1.hxjs,
       pmi1.hms,
       pmi1.scm,
       pmi1.qt,
       (select [ORGCODE] from dual) orgcode
  from pidera_mouse pm
  left join (select pmi.mouse_reference_id,
           sum(decode(pmi.mouse_name, '01', pmi.mouse_num)) hjs,
           sum(decode(pmi.mouse_name, '02', pmi.mouse_num)) xjs,
           sum(decode(pmi.mouse_name, '03', pmi.mouse_num)) hxs,
           sum(decode(pmi.mouse_name, '04', pmi.mouse_num)) hxjs,
           sum(decode(pmi.mouse_name, '05', pmi.mouse_num)) hms,
           sum(decode(pmi.mouse_name, '06', pmi.mouse_num)) scm,
           sum(decode(pmi.mouse_name, '07', pmi.mouse_num)) qt
         from pidera_mouse_info pmi
             group by pmi.mouse_reference_id) pmi1
                                    on pm.mouse_id =pmi1.mouse_reference_id
  join zonecode z on pm.zonecode = z.zonecode
 where pm.del_state != 1
   and [ZONECODE]
   and [DISTRICT]
   and [BEGINDATE]
   and [ENDDATE]

后来加入空值处理函数coalesce

select pm.mouse_id as lid,
       pm.monitor_year || '-' || pm.monitor_month as monitortime,
       decode(pm.biotope, '01', '室内', '02', '室外') biotopes,
       z.cnname as county,
       pm.report_unit,
       coalesce(pmi1.hjs,0) hjs,
       coalesce(pmi1.xjs,0) xjs,
       coalesce(pmi1.hxs,0) hxs,
       coalesce(pmi1.hxjs,0) hxjs,
       coalesce(pmi1.hms,0) hms,
       coalesce(pmi1.scm,0) scm,
       coalesce(pmi1.qt,0) qt,
       (select [ORGCODE] from dual) orgcode
  from pidera_mouse pm
  left join (select pmi.mouse_reference_id,
       		sum(coalesce(decode(pmi.mouse_name, '01', pmi.mouse_num),0)) hjs,
       		sum(coalesce(decode(pmi.mouse_name, '02', pmi.mouse_num),0)) xjs,
      		sum(coalesce(decode(pmi.mouse_name, '03', pmi.mouse_num),0)) hxs,
       		sum(coalesce(decode(pmi.mouse_name, '04', pmi.mouse_num),0)) hxjs,
       		sum(coalesce(decode(pmi.mouse_name, '05', pmi.mouse_num),0)) hms,
       		sum(coalesce(decode(pmi.mouse_name, '06', pmi.mouse_num),0)) scm,
       		sum(coalesce(decode(pmi.mouse_name, '07', pmi.mouse_num),0)) qt
  	     from pidera_mouse_info pmi
             group by pmi.mouse_reference_id) pmi1
                                    on pm.mouse_id =pmi1.mouse_reference_id
  join zonecode z on pm.zonecode = z.zonecode
 where pm.del_state != 1
   and [ZONECODE]
   and [DISTRICT]
   and [BEGINDATE]
   and [ENDDATE]

问题解决啦！。