repa, repb ]) (# unboxedTyA, unboxedTyB #) where rebox (# a#, b# #) = ( rebox a# , rebox b# ) A levity-polymorphic type is not allowed here:Type: unboxedTyA In the type of binder ‘a
当我通过将现有帐户的余额更新为负值来测试触发器时,我得到错误:表帐户正在发生变化,触发器/函数可能看不到它。我不明白这是什么意思,也不知道如何让触发器工作。Table Account(A#, CNAME, BNAME, BAL); PK=A#.accountdeclare begin
select bal into v_bal from account where A#20106, 'ACCT BAL MUST BE POSITIVE'