Oracle触发器更新同一张表 [英] Oracle Trigger to update a the same table

问题描述

我有一个触发器，我试图用它来更新它监听的同一个表.

I have a trigger which I'm trying to use to update the same table it listens to.

但是，在提交创建或更新时，我收到以下错误:

However, upon submitting a create or update, I get the following errors:

ORA-04091: table [username].ADDRESSES is mutating, trigger/function may not see it ORA-06512: at "[username].ADDRESSES_T1", line 9 ORA-04088: error during execution of trigger '[username].ADDRESSES_T1'

感谢您的帮助！

推荐答案

您正在更新编写触发器的同一个表.你需要这样的东西:

You're updating the same table the trigger is written. You need something like this:

create or replace trigger "ADDRESSES_T1"
BEFORE
insert or update on "ADDRESSES"
for each row
begin
DECLARE
   l_lat NUMBER;
   l_lng NUMBER;
   l_postcode VARCHAR2(8) := :NEW.POSTCODE;

BEGIN
  brian.POSTCODE_TO_LAT_LNG_GM_API (l_postcode, l_lat, l_lng);
  :new.location = SDO_GEOMETRY(2001, --SDO_GTYPE
                               8307, --SDO_SRID
                               SDO_POINT_TYPE(l_lng, --X lng
                                              l_lat, --Y lat
                                              null),     --Z
                               null, --SDO_ELEM_INFO_ARRAY
                               null);
END;

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