select max(id) from t_test into array li_max这句怎么执行不正确？

[bzlj]

select max(id) from t_test into array li_max
if found()
li_max = li_max + 1
else
li_max = 1
endif
这句执行始终是not found,怎么回事,有哪些可能情况阿
帮别人用VF做作业,第一次用,晕阿...

[cdbqss1]

不应该用found(),而用_tally测试找没找到数据.
改为:
li=0
select max(id) from t_test into array li_max
if _tally>0
li = li_max(1) + 1
else
li = 1
endif