在“ =”之前插入符号“ *”以继续

Question

create or replace trigger check_status BEFORE update on LDS_PLACEMENT
for each row declare STATUS LDS_PLACEMENT.STATUS%type;
begin
STATUS :=old.STATUS;
if STATUS := 'Closed' then
raise_application_error(-20111,'Sorry the placement is closed');
end if;
end;

第5行出现错误。代码未编译。

这是一项学术任务。

Answer 1

从if语句的等式中删除:

：=表示您的分配值就像您在old.status

中所做的一样

create or replace trigger check_status BEFORE update on LDS_PLACEMENT
for each row declare STATUS LDS_PLACEMENT.STATUS%type;
begin
STATUS := :old.STATUS;

if STATUS = 'Closed' then
raise_application_error(-20111,'Sorry the placement is closed');
end if;
end;