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Triggers String/Char Functions Numeric/Math Functions Date/Time Functions Conversion Functions Analytic Functions Advanced Functions Oracle / PLSQL: ORA-04091 Learn the cause and how to resolve the ORA-04091 error message in Oracle. Description When you encounter an ORA-04091 error, the following error message will appear: ORA-04091: table name is mutating, trigger/function may not see it Cause A statement executed a trigger or oracle statement level trigger custom PL/SQL function. That trigger/function tried to modify or query a table that is currently being modified by the statement that fired the trigger/function. Resolution The option(s) to resolve this Oracle error are: Option #1 Re-write the trigger/function so that it does not try to modify/query the table in question. For example, if you've created a trigger against the table called orders and then the trigger performed a SELECT against the orders table as follows: CREATE OR REPLACE TRIGGER orders_after_insert AFTER INSERT ON orders FOR EACH ROW DECLARE v_quantity number; BEGIN SELECT quantity INTO v_quantity FROM orders WHERE order_id = 1; END; You would receive an error message as follows: When you create a trigger against a table, you can't modify/query that table until the trigger/function has completed. Remember that you can always use the :NEW and :OLD values within the trigger, depending on the type of trigger. Learn more about Triggers. Share this page: Advertisement Back to top Home | About Us | Contact Us | Testimonials | Donate While using this site, you agree to have
- 8:40 pm UTC Category: SQL*Plus – Version: 8.1.7 Latest Followup You Asked hello, i've got a table MRC and a trigger on it (AFTER INSERT) thus, after an insert in the table MRC, this trigger has to determine if a new line must be inserted into
Ora-04091 Solution
an other table PLAN : for that, it does compare the :new values with the MOST oracle mutating trigger pragma autonomous transaction RECENT enregistrement of MRC but i got a mutating table error i understand the problem but how can i get over ?? thanks Arnaud and mutating trigger in oracle 11g we said... My personal opinion -- when I hit a mutating table error, I've got a serious fatal flaw in my logic. Have you considered the multi-user implications in your logic? Two people inserting at the same time (about the https://www.techonthenet.com/oracle/errors/ora04091.php same time). What happens then??? Neither will see eachothers work, neither will block -- both will think "ah hah, I am first"... anyway, you can do too much work in triggers, this may well be that time -- there is nothing wrong with doing things in a more straightforward fashion (eg: using a stored procedure to implement your transaction) but if you persist, you can use the technique: http://asktom.oracle.com/~tkyte/Mutate/index.html to avoid the mutating table constraint -- but I https://asktom.oracle.com/pls/apex/f?p=100:11:0%3A%3A%3A%3AP11_QUESTION_ID:9579487119866 would avoid the situation that gets me there in the first place. The logic is a whole lot more understandable that way (and maintainable and testable and everything) Reviews Write a Review Ora-4091 May 05, 2003 - 5:45 pm UTC Reviewer: A reader We create trigger in the test server (8i) its working without error, and when we created at life (8) we get the following error: ORA-04091: table XXXX is mutating, trigger/function may not see it. Followup May 05, 2003 - 8:31 pm UTC they relaxed some of the constraining rules between 8.0 and 8.1 -- things are in general upwards (develop in 8.0 and goto 8.1) compatible but not backwards. Why I can't get the 4091 error when insert? January 05, 2004 - 3:39 am UTC Reviewer: Li ys from CHINA I only want to prove the mutating table by this triggers: CREATE TABLE r_Module ( Bureauno NUMBER(3), Moduleno NUMBER(3), primary key ( Bureauno, Moduleno ) ); CREATE OR REPLACE TRIGGER LimitTest BEFORE INSERT OR UPDATE ON r_Module FOR EACH ROW DECLARE v_MaxModuleNum CONSTANT NUMBER := 5; v_CurModuleNum NUMBER; BEGIN SELECT COUNT(*) INTO v_CurModuleNum FROM r_Module WHERE Bureauno = :new.Bureauno; IF v_CurModuleNum + 1 > v_MaxModuleNum THEN RAISE_APPLICATION_ERROR(-20000,'Too many Module in the Bureauno:'||:new.Bureauno); END IF; END; / When I insert some record into r_module table,I can't get the 4091 error,but when I update one, the error come. I wonder if the insert can't lead the mutating table err
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for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Ask a Question Ask for Help Receive Real-Time Help Create a Freelance Project Hire for a Full Time Job Ways to Get Help Expand Search Submit Close Search Login Join Today Products BackProducts Gigs Live Careers Vendor Services Groups Website Testing Store Headlines Experts Exchange > Questions > Oracle error 4091 error in pl/sql Want to Advertise Here? Solved Oracle error 4091 error in pl/sql Posted on 2007-08-12 Oracle Database 1 Verified Solution 1 Comment 1,046 Views Last Modified: 2013-12-19 i have to tables with this specification s1(id1,id2,id3,asmt,rcpt,trsp) s2(id1 ,id2 ,id3 ,extd) supose that all feilds are varchar and id1,id2,id3 in s1 are unique with together but in s2 are not. these two tables link with id1,id2,id3 feilds. i wanna write a row trriger that when i update the field rcpt in s1 if feild extd in s2 is '1' then the feild trsp in s1 fill with '400' (in my application that connect to oracle first the fileds of id1,id2,id3,asmt from s1 and id1,id2,id3,extd from s2 will fill and in other stages other fields will fill) so this is my triger create or replace trigger s11 before update of rcpt on s1 for each row declare n_count1 number; begin if ((:old.asmt is not null) and (:old.rcpt is null) and (:old.trsp is null) ) then select count(*) into n_count1 from s1,s2 where ((s2.id1=:old.id1) and (s2.id2=:old.id2) and (s2.id3=:old.id3) and (s2.extd='1')); if ((n_count1 >0) ) then :new.trsp := '400'; end if; end if ; end; insert into s1 values('1','2','3','20',null,null); insert into s2 values('1','2','3','1'); update s1 set rcpt ='500' where ((id1='1') and (id2='2') and (id3='3')); but when i excute an update statement in sqlplus in oracle i get ora 4091 error. (mutating table) how can i solve this problem please write the correct terriger code. 0 Question by:mhyassin Facebook Twitter LinkedIn Google LVL 27 Best Solution bysujith80 You dont have to join with s1 inside the trigger. The rowl