${if(org_shortname = '',"

SELECT business_m as 数值  

FROM table_A

WHERE 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_A

WHERE 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。