Oracle table mut…

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create or replace trigger OP.update_lis_statue
after insert on op.op_charge
for each row

begin
    if :new.sum_total < 0 then
    update   ht.yj_tbs_jycomapplym t set t.fcancelflag = '1'
    where t.fpatno in(select a.visit_no from op.op_visit a,op.op_charge b
                      where a.visit_id = b.visit_id and b.charge_id = :new.charge_id)
    and t.fitemno in(select c.item_id from op.op_charge c
                      where c.charge_id = :new.charge_id);
    end if;
end update_lis_statue;

以上触发器是实现退费后更新某表的标志功能，虽然在pl/sql编译通过，但使用中报错如下：

ORA-04091: table OP.OP_CHARGE ismutating, trigger/function may not see it
ORA-06512: at "OP.UPDATE_LIS_STATUE", line 3
ORA-04088: error during execution of trigger'OP.UPDATE_LIS_STATUE'

分析如下：

因为触发器是建立在表op_charged after insert的，所以报错是说明表在after insert后mutating(改变)，按英文意思理解 trigger or function may not see it

改代码，解决如下：

create or replace trigger OP.update_lis_statue
after insert on op.op_charge
for each row

begin
    if :new.sum_total < 0 then
    update   ht.yj_tbs_jycomapplym t set t.fcancelflag = '1'
    where t.fpatno in(select a.visit_no from op.op_visit a
                      where a.visit_id = :new.visit_id)
    and t.fitemno = :new.item_id;
    end if;

end update_lis_statue;

行级操作，其实只要取当前插入行的数据作为约束条件就行了，当初是想太多了

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