sql报错、ORA-01427: 单行子查询返回多个行
select * from ( select row_.*, rownum rownum_ from ( select ids "ids" , procinstid "procinstid" , businesskey "businesskey" , sysordertitle "sysordertitle" , sysordercreator "sysordercreator" , startuserid "startuserid" , procdefid "procdefid" , to_char(starttime) "starttime" , to_char(endtime) "endtime" , key "key" , name "name", currentinfo "currentinfo" from ( select proc.id_ ids, proc.proc_inst_id_ procinstid, proc.business_key_ businesskey, (select v.TEXT_ from ACT_HI_VARINST v where v.proc_inst_id_ = proc.proc_inst_id_ and v.NAME_ = 'sysOrderTitle') sysOrderTitle, (select v.TEXT_ from ACT_HI_VARINST v where v.proc_inst_id_ = proc.proc_inst_id_ and v.NAME_ = 'sysOrderCreator') sysOrderCreator, proc.start_user_id_ startuserid, proc.proc_def_id_ procdefid, to_char(proc.start_time_,'yyyy-MM-dd hh24:mi:ss') starttime , to_char(proc.end_time_,'yyyy-MM-dd hh24:mi:ss') endtime , def.key_ key , def.name_ name, (select to_char(wmsys.wm_concat(to_char(act_name_ || ':' || act.assignee_))) from act_hi_actinst act where act.proc_inst_id_ = proc.proc_inst_id_ and act.end_time_ is null and act.act_type_ in ('startEvent', 'userTask')) currentinfo from act_hi_procinst proc, act_re_procdef def where proc.proc_def_id_ = def.id_ ) temp where 1=1 and temp.startuserid = 'wanghongfa' order by starttime desc ) row_ ) where rownum_ > 0 and rownum_ <= 4
分析子查询发现问题,单行子查询返回多个行
select (select v.TEXT_ from ACT_HI_VARINST v where v.proc_inst_id_ = proc.proc_inst_id_ and v.NAME_ = 'sysOrderTitle') sysOrderTitle from act_hi_procinst proc, act_re_procdef def where proc.proc_def_id_ = def.id_ ;
其中:select v.TEXT_ from ACT_HI_VARINST v where v.proc_inst_id_ = proc.proc_inst_id_ and v.NAME_ = 'sysOrderTitle',应该返回与act_hi_procinst proc, act_re_procdef def where proc.proc_def_id_ = def.id_ 一样的行数的记录,但是从图中我们可以看出PROC_INST_ID_重复出现,实例变量表多了一条记录。
我怎么会保存多了记录在ACT_HI_VARINST 表里面呢,原因是在重新申请环节,保存了一些关键字。
解决办法:重新申请不要保存有关键字
sysOrderTitle(是子查询条件,任务环节不要保存这个字段,不然报错--单行子查询返回多个行)
sysOrderCreator(是子查询条件,后台也要做处理,不要让其保存在任务环节)
sysOrderKey(不是子查询条件,但任务环节没有必要保存)
sysOrderDesc(不是子查询条件,任务环节也会有该字段)