blob字段游标这样申明对不对？

[bpfrom]

DECLARE cur_map CURSOR FOR
SELECT Map.txt
FROM Map where DS_ID=:i_dsid order by num;

[wzyun]

好像不行

[ksmgbits]

不对，应为如下才对：
blob var_emp_pic
declare my_cursor cursor for selelctblob emp_pic
from employee where employee.emp_num = 100;
open my_cursor;
fetch my_cursor into :var_emp_pic;