${if(org_shortname = '',"SELECT business_m as 数值 FROM table_AWHERE index_code = 'CB005'AND org_code = (SELECT distinct org_shortname FROM table_A WHERE org_code = 'GL001' AND STATS_MTH = '"+month+"' ORDER BY org_shortname limit 1)AND stats_mth = '"+ month +"'","SELECT business_m as 数值FROM table_AWHERE index_code = 'CB005'AND org_shortname = '"+ org_shortname +"'AND stats_mth = '"+ month +"'")}请大神帮看下上面这个sql,当参数org_shortname为空时,一直执行不出来,不知道是不是条件中的子查询格式有问题。