Table A basically has 4 rows of interest, an outside event changes/inserts let's say row 1.
Row 2 and 3 have to be changed in a trigger depending on the new value of 1.(or not if the value stays the same)
Row 4 is the reference for the update and will not be changed.
My first simple AFTER INSERT or UPDATE trigger obviously failed because of the mutating table error.
How can we overcome mutating trigger error using global temporary table.
Suppose if we use the following trigger we will get mutating trigger error.
CREATE OR REPLACE TRIGGER t1
AFTER INSERT ON emp
FOR EACH ROW
DECLARE
BEGIN
UPDATE emp SET sal=sal+100;
END;
/
I have created a trigger which gets executed whenever there is DML operation happens on it. I am getting the below error. ORA-04091: table RTS_SCHEMA.TBL1 is mutating, trigger/function may not see it...the tigger is on table tbl1 and the structure of the table is
CREATE TABLE TBL1
(
SLNO NUMBER NULL,
DES VARCHAR2(20 BYTE) NULL
)
LOGGING
NOCOMPRESS
NOCACHE
NOPARALLEL
MONITORING;
[code]...
I have a base table (Table A) block with multiple records displayed. I need to track audits to this underlying table in the following way:
If user updates a field in the block I want the pre-changed record's audit fields to be set and I need to create a copy of the record with the changed values. Basically any changes will result in the record being logically deleted, and a copy record created with the newly changed values.
Tried to implement in the block's pre-update trigger which will call a package to directly update Table A then Insert into Table A, then requery the block. Is there a clean and efficient way to do this?
i want to create a trigger that will update a table when there is an insert or update.i can't across this error that i don't even know what it means "table %s.%s is mutating, trigger/function may not see it".
*Cause: A trigger (or a user defined plsql function that is referenced in this statement) attempted to look at (or modify) a table that was in the middle of being modified by the statement which fired it.
*Action: Rewrite the trigger (or function) so it does not read that table.
CREATE OR REPLACE TRIGGER set_date_end
BEFORE INSERT OR UPDATE OF issued ON shares_amount
FOR EACH ROW
DECLARE
BEGIN
INSERT INTO shares_amount(date_end) VALUES(SYSDATE);
END set_date_end;
/
Select * from Table A where emp=1;
Emp AID
1 111
select * from Table B where emp=1 ;
----------
AID, emp, start_dt, End_dt
111 1 01-jan-2011 31-dec-2011
112 1 01-jan-2011 31-dec-2011
113 1 01-jan-2011 31-dec-2011
I have After insert or update trigger on Table B. This will update AID column on Table B.
after insert update on table B
update A
set AID=:new.AID where emp=:new.emp;
if i end date any record on table B i wanted to update max(AID) on Table A.
EX update table b
set end_dt= sysdate-1
where aid=111;
So I wrote the trigger on Table A as below
before insert or update on trigger A
declare
v_aid number;
v_strt_dt date;
v_end_dt date;
begin
select max(AID) from table B
where emp=:new.emp;
select v_end_dt from table B where aid=:new.Aid;
if v_end_dt<sysdate then
:new.aid:=v_AID;
end if;
But the problem here is its giving mutating error.Then i tried with autonomus transaction but it willreturn old value when it fiers.
So how can i achive both the task at a time.That means i have to endate Table A , Same time i have to update active max(AID) to table B.
I am calling an after insert Trigger on table1.
In the trigger I am calling a procedure that returns an error if there is any error returned from procedure. I have to update the table table1's column error_desc (for the same new inserted record for which the trigger was called) with the error received by OUT parameter of procedure called in trigger. I have to update the same record on whose insert this trigger was called.
We would like to create functions to insert and update our tables and would like to make it not possible to update and insert the table directly outside of the function. Is there a way to do that in the trigger?
View 1 Replies View RelatedI have a table EMPLOYEE with columns employee_id and status. I have a requirement that when an employee status is getting changed, then even its linked employee's status also should be changed to the same status value. For this, I need to handle the updating of linked employee's status using a trigger.
Since we get mutating trigger issue when try to update the originating table, I am trying to go with the approach of "in place of a single AFTER row trigger that updates the original table, resulting in a mutating table error, you may be able to use two triggers. The first is an AFTER row trigger that updates a temporary table, and the second an AFTER statement trigger that updates the original table with the values from the temporary table".
But however I am still facing the same issue.
Test case:
CREATE TABLE EMPLOYEE
(
EMPLOYEE_ID VARCHAR2(1),
STATUS NUMBER(9)
);
INSERT INTO EMPLOYEE VALUES ('A',1);
INSERT INTO EMPLOYEE VALUES ('B',1);
commit;
[code]....
Also, any alternate options (rather than using 2 triggers with temp table).
Best solution to avoid mutating table error?
View 11 Replies View RelatedOracle version: 10g express.
case study: one class has many students, only one student has reward.
original design:
drop table student;
drop table class;
[Code]...
questions:
1. If I want insert into student values('stu2','cls1','yes'); I can put a trigger on student to check whether it has only one student in class has reward. This trigger should tell me error: I can not let 'stu2' has 'yes' on reward column. But it will lead Oracle error: ora-04091: mutating table. It seems use "after" or "instead of" trigger can solve this problem, so how to do it?
2. Another way to make sure only one student in a class has reward is change design as:
drop table student;
drop table class;
create table class(
clsid varchar2(9) primary key,
reward_stuid varchar2(9));
create table student(
stuid varchar2(9) primary key,
clsid varchar2(9)
not null references class(cid) on delete cascade);But the question is these two tables has foreign key from each other, is it a good design?.
I have to write a trigger where when the table is updated then one column named 'Status' should be updated as 'U' and if arow is inserted in the table then the column 'Status' needs to be inserted with value 'I'.
Create table test_trig
(
vempno number,
vempname varchar2(20),
status char
)
New to triggers....how to go with both insert and update conditions together.
Can we write a trigger which takes care of both insert and update. I have used Merge statement where I can write conditions based on insert/update done.
I am trying to write a trigger that will do an insert/delete/update into a audit table when a change has occurred on the primary table. The change will be recorded in the audit table by a incemental sequence number and the updated data.
there will be an extra column in the audit table
how to get a simplified version of this trigger.
the primary table will look like so
Id_num varchar (20)
code Integer
desc varchar(20)
sequence_num Integer
audit table
Id_num varchar(20)
code Integer
desc varchar(20)
timestamp date
sequence_num Integer
SQL> CREATE OR REPLACE TRIGGER TRI_COMPL_FEATURES
2 AFTER INSERT OR UPDATE ON COMPLEMENTS FOR EACH ROW
3 DECLARE
4 v_fno NUMBER;
5 v_tab VARCHAR2(30);
6 v_unique_id VARCHAR2(40);
[code]....
Trigger created.When I am trying to insert into complements table it is throwing error as follows:
SQL> insert into complements values(19,NULL,'5',6,7,NULL,'W2023648',NULL,NULL);
insert into complements values(19,NULL,'5',6,7,NULL,'W2023648',NULL,NULL)
*
ERROR at line 1:
ORA-20010: ORA-04091: table TEEMNGWS.COMPLEMENTS is mutating, trigger/function
may not see it
ORA-06512: at "TEEMNGWS.TRI_COMPL_FEATURES", line 19
ORA-04088: error during execution of trigger 'TEEMNGWS.TRI_COMPL_FEATURES'
I can understand that I am trying to perform DML operation(i.e select) on table which trigger is fired.But how can I implement the same logic when AFTER INSERT OR UPDATE trigger is written.
What is Mutating error,have u faced it, I have faced this question so many time in interviews but i have not facing this problem till now.
View 15 Replies View Related1.I have created table emp_log using structure of emp table
create table emp_log
as select * from emp
where 1=2;
2.Now I have added some new fields i.e
new_sal(updated salary) ,
upd_by (who updated),
upd_date (Salary update date)
alter table emp_log
add (new_sal number, upd_by varchar2(20),upd_date date);
3. I have made following trigger to insert old and new values (for salary,user and date) in emp_log table whenever I update sal for particular employee in emp table and at the same time i am selecting the updated value of sal into lv_sal variable which will cause mutating error.
create or replace trigger emp_trg
after update of sal on emp
for each row
declare
[code]...
4. Suppose sal of emp is 1000:-
update emp
set sal=sal+100
where empno=7369;
>select * from emp_log;
output:- sal= 1000 new_sal=1100
[code]...
Now the question starts if i commment pragma autonomous_tansaction and commit statement then it gives mutating error because at the same time i am updating and selecting value of sal from emp table.
create or replace trigger emp_trg
after update of sal on emp
for each row
declare
[code]...
Questions:-
1.Is pragma autonomous_transaction handling the mutating error and if yes then how?
2.How many ways are there to handle mutating error.
3.What is the exact definition of Mutating Error.
4.An example or query to use lv_sal variable for printing new updated sal.
5.What is Mutating Table , Is it similar to mutating error (Found this topic while searching for mutating error).
I am facing a post trigger problem.No error while compiling.
DECLARE
mYPACCT VARCHAR2(10);
mTRNNO NUMBER; mVNO NUMBER; mSR NUMBER; mNARRATION VARCHAR2(200); mCHCODE VARCHAR2(10); mPARTY VARCHAR2(200);
mBRAND VARCHAR2(200); mYARN VARCHAR2(200);
BEGIN
BEGIN
SELECT YPACCT INTO mYPACCT FROM CONFIG;
EXCEPTION WHEN NO_DATA_FOUND THEN NULL;
END;
[code].....
I have table test1(id,name) and table test2(id,,name)
Now when I update name column of a row on test1 I want the same value to be updated for the same id in test2.
So I wrote this trigger but its not working
create trigger test_trigger after update on test1 for each row
begin
update test2 set name=new.name where test2.id=id
end
/
CREATE or REPLACE TRIGGER Emp_Ins_Upd_Del_Trig
BEFORE delete or insert or update on EMP
FOR EACH ROW
BEGIN
if UPDATING then
[Code] .....
I am ceating a trigger to...when I update or insert a record in table and if salary of that record is less than 1600 than it should be updated to 2000. My trigger is
CREATE or REPLACE TRIGGER myTrigger
BEFORE UPDATE OR INSERT ON newemp
FOR EACH ROW
BEGIN
[code]...
There are no errors with trigger while compiling, but when I update or insert a record, it does not update the table. It looks like the trigger is being ignored.
writing a trigger body. My requirement is i need to insert a new record in a task table when ever a new record is inserted into employee table.Here in the trigger i need to select the name of the employee in the last inserted row in employee table and insert the name in task table.I tried to write the code as below
insert into task(name, date, type) values ((select name from employee where emp_id=(select max(emp_id) from employee), sysdate, 'document'));
When i am trying to insert record using trigger, it is taking last but one record from the employee table.
I am trying to create some PL/SQL that will create a trigger for UPDATES and INSERTS which will update a column on the same row to the system date.
So far I have:
DECLARE
tablename VARCHAR(30) := 'table';
triggername VARCHAR(30) := 'mytrigger_' || tablename;
[Code]....
I have declared the tablename and triggername outside the trigger creation as I need this to be parameterised for a list of tables.
The procedure IsCDCUser just checks it should be updating for this user.
The problem I get is the following error:
Bind Variable "NEW" is NOT DECLARED
i have created a trigger on a table after update. i am using if condition if the condition is true i am passing a value and then inserting into audit table.
if(condtion)
L_change_type='value'
end if;
if(condtion)
L_change_type='value'
end if;
if(condtion)
L_change_type='value'
end if;
if(condtion)
L_change_type='value'
end if;
Then i am inserting
Insert into audit_table(change_type.....)
values(..L_change_type)...)
If i want to skip the insert statement for particular condition wt i have to do.
I have three tables.
One for projects, one for volunteers, and a bridge entity for the many to many relationship between the Project and Volunteer.
In Project table, I have a field called, Volunteers_currently_signed_up, which means the number of volunteers currently signed up to participate in a project.
When I add an entry to my bridge entity which is composed of Volunteer_ID and Project_ID, I want the Volunteers_currently_signed_up to increment by 1, where the Project_ID in the bridge entity corresponds to that in Project.
I have very very little PL/SQL, and this is my amateur attempt so far:
CREATE OR REPLACE trigger "BI_Volunteers_currently_signed_up"
BEFORE INSERT OR UPDATE ON Volunteers_in_project
for each row
WHERE Volunteers_in_project.Project_ID=Project.Project_ID;
begin
Project.Volunteers_currently_signed_up += 1;
end;
/
write a trigger that achieves the above
i have 2 identical tables....the trick is with regards to one column say column A,the first table TableA is constantly having data inserted and data updated, what im trying to do is create a before insert or update trigger that looks at column A and if column A=20 it changes this to 5 and inserts this into the tableB, everything else with the exception of Column A will be the same:-
this trigger i have done works but doesnt change the value of column A (INPUT_NADI) as i dont know how to do this:-
CREATE OR REPLACE TRIGGER UPDATE_TRG_NP_NE1_T0
BEFORE INSERT ON TESTNSS.NP_NE1_T1
REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW
DECLARE
BEGIN
INSERT INTO NP_NE1_T0
VALUES
[code]....
My scenario is I need to insert into History table when a record is been updated into a tabular form(insert the updated record along with the additional columns Action_by,Action_type(Like Update or delete) and Action Date Into History table i.e History table contains all the records as the main table which is been visible in tabular form along with these additional columns ...Action_by,action_type and action_date.
So now i dont want to create a befor/after update trigger on base table rather i would like to create a generic procedure which will insert the updated record into history table taking the page alias and pade ID as the parameters(GENERIC procedure is nothing but whcih applies to all the tabular forms(Tables) contained int he application ).
I have table t1 and t1 , I want a procedure that will insert all records from t1 into table t2 and after successfull insert table t1 should be truncated .
If their is any problem in insert in to table t2 , the truncate command should not work .
Truncate command should work only after successfully insert command .
I need to take a snapshot of a table before insert or update happens to that table.... in oracle 10g. I am reading the MV docs from oracle and below link..
[URL].......
how MV should be written for this and how to schedule it in dbms_jobs for auto refresh?
assuming that t1 is the table where DML operation are goin to happen so before any insert or update, snapshot has to be taken, and I am assuming that to do this it would look something like this?
create materialized view my_view refresh fast as select * from t1;
create materialized view log on my_view;
and then schedule in a dbms_jobs?
i have two table:
QUOTE create table test1(
num number(4),
name varchar2(50));
create table test2(
num1 number(4),
name1 varchar2(50));
then i want to create a trigger before update on table test1 that i want to insert in table test2 the old values in table test1:
for example
QUOTE insert into test1(1,'cocol');
QUOTE update test1
set name='oracle' where num=1;
so i want the trigger to insert 1 and cocol into the table test2.
I have table 'A' with column 'ID','NAME','IN_DATE','PHONE','EMAIL'
Now I have to create a trigger such that on every insert in the table 'A' the value of column 'IN_DATE' changes to sysdate.I m not good in PL/SQL