SQL & PL/SQL :: Mutating Tables And Row Level Triggers?
Feb 24, 2010
I am unable to understand why row level triggers cant be used in mutating tables.
If you need to update a mutating table, you could bypass these restrictions by using a temporary table, a PL/SQL table, or a package variable. For example, in place of a single AFTER row trigger that updates the original table, resulting in a mutating table error, you might use two triggers--an AFTER row trigger that updates a temporary table, and an AFTER statement trigger that updates the original table with the values from the temporary table.
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Jan 24, 2012
i'm trying to audit ddl actions(a strange "disappearing of a table every couple of days) on a specific table.
i want to trigger those actions, but not on a database level, but a table's level only(or at least a user schema's).
when i execute
CREATE OR REPLACE TRIGGER system.audit_trg BEFORE DROP ON tu2.d
BEGIN
INSERT INTO
[Code].....
i get an error
ORA-30506: system triggers cannot be based on tables or views
and if it is - how do i adjust my plsql?
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Sep 30, 2011
Is it possible to create trigger on the various tables and views exists (i.e. dynamic performance views) in data dictionary, when ever any DML operations performs by Oracle it self?
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Mar 29, 2010
I need to identify the dependencies of all the Tables on Packages at column level.
E.g. : XYZ is a package that uses ABC Table having E,F,G has a column, PQR - Table and its columns - R,S,T
The resultant query / code should return like this
PackageName TableName ColumnName
XYZ ABC E
XYZ ABC F
XYZ ABC G
XYZ PQR R
XYZ PQR S
XYZ PQR T
Identify the dependencies at column level.
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Jan 20, 2011
Our Testing DB is running in No archive log mode. I did a schema level import by dropping the existing user that contain tables, recreate the user and finished the import. Now they want the old tables back.Is there is any way to recover the old tables?
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Sep 26, 2012
While practicing with Triggers, the following error was encountered. An Object Type and an object Table are created.
create or replace
type typPerson is object
(id number,
firstname varchar2(30),
lastname varchar2(30)
[code].........
I executed the below insert statement, and I got the following error.
SQL> insert into person_obj_tab values (10,'Object1','From Trigger');
insert into person_obj_tab values (10,'Object1','From Trigger')
*
ERROR at line 1:
ORA-03113: end-of-file on communication channel
Process ID: 4153
Session ID: 136 Serial number: 305
[code]......
SQL> insert into person_obj_tab values (10,'Object','Original');
1 row created.Question:
1) Trigger of version 1 did not report any error during compilation, but during DML execution, hangs for sometime and gives the above error.
2) Whether direct assignment of Objects of greater size is possible inside triggers built on object Tables?
3) Suppose an object contain multiple attributes (say more than 20), then how to assign them inside a trigger?
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Sep 2, 2005
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.
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Oct 20, 2013
1.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).
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Jun 13, 2012
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]...
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May 16, 2011
Best solution to avoid mutating table error?
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May 14, 2010
I have a data like,
1) manual_temp_master
auto_idbatch_id sec_idsec_id_type crrncy_cdcreate_Dt price_dt
------------------------------------------------------------------
11234ABC1CUSIPUSD14/05/201014/05/2010
23456XYZ1SEDOLGBP13/05/201013/05/2010
2)manual_temp_detl
auto_idbatch_id Price_bkt_cdscreate_Dtprice_date
---------------------------------------------------------
11234PS114/05/201014/05/2010
11234PS214/05/201014/05/2010
11234PS314/05/201014/05/2010
11234PS414/05/201014/05/2010
[code]....
I want to write a sql query which will fetch the data from manual_temp_master and manual_temp_detl.But from manual_temp_detl table, Price_bkt_cds columns should be displayed as columns. Like the should look like as below:
sec_idsec_id_type crrncy_cd COL_PS1 COL_PS2 COL_PS3 COL_PS4 COL_PS5COL_PS6price_date
--------------------------------------------------------------------------------------
ABC1CUSIPUSDPS1PS2PS3PS4PS5PS614/05/2010
XYZ1SEDOLGBPPS1PS2PS3PS4PS5PS613/05/2010
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Nov 17, 2010
what is the difference on DBMS_STATS for table level and partition level , which will provide the best optimizer . If the table xxxx is partitioned from 1 to 10 ,then running gather stats on table xxxx as whole table level or partition level which will provide best result on the performance.
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Feb 18, 2013
I 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).
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Apr 11, 2013
Oracle 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?.
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Jun 21, 2010
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;
/
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Jul 4, 2013
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.
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Oct 22, 2012
Can you take an incremental backup level 1 or level 0 without archivelogs?
syntax would bebackup as compressed backupset cummulative level 1 database.
The reason I ask is because when I run backup as compressed backupset cummulative level 1 database plus archivelogs # it runs fine, but when I run backup as compressed backupset cummulative level 1 database it just hangs.
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Apr 11, 2013
between statement level or row level trigger, which trigger will execute first.We have BEFORE_UPDATE_ROWLEVEL_TRIGGER and BEFORE_ UPDATE_ STATEMENT LEVEL_TRIGGER triggers on table product.
which will execute first on update DML event ?
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Dec 26, 2011
What is the purpose and use of 'Instead of Triggers'
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Dec 4, 2010
I have to write two triggers on same table for auditing different columns of different users(may be different modules).
I will have an audit table in which i will insert data such as (user_id,module_id,column_name,old_col_val,new_col_val,timestamp)
Now different users from different modules will update the data on same table may be same columns from different front end forms!
If we write directly, we will not be able to know which column is updated by which user.
My question is in this case how can we control the triggers to raise differently?
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Jul 1, 2010
Im going to create a trigger(insert or update) for a table A, when it fires inserted or updated columns are should be insert or update into another table say table B, one column(Processed_time) in table B where its value will be by subtracting two columns in table A(response_time,Submission_time) all are timestamp type.
How to update(Processed_time) in table B by subtracting above two columns in table A.
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Nov 1, 2011
I have rather large compound triggers that I discovered were not firing this morning, so I created a simpler compound trigger to test:
CODECREATE OR REPLACE TRIGGER "test"
FOR INSERT OR DELETE OR UPDATE OF KI_NM ON CHEMAXON.CB1ASSAYS
REFERENCING OLD AS OLD NEW AS NEW
FOR EACH ROW
ENABLE
[code]...
It's just not firing. The tables are all in the owner's schema (who has DBA rights). My Google-fu is failing me, and I'm not sure how to start troubleshooting general trigger failure.
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Dec 3, 2010
The trace directory is full of trc files with the text below:
--------Dumping Sorted Master Trigger List --------
Trigger Owner : INPUT
Trigger Name : CUS_TST
--------Dumping Trigger Sublists --------
There is like a file generated every minute, and i cant stop it from happening.I have tried setting the trace_enabled parameter to FALSE but no success.
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Jul 26, 2004
I have column names stored in a table(say t1).
Inside a trigger I have to dynamically get the : old. values for only these columns.
This I need because during update trigger on a table (say t2) I am supposed pickup the coumn names stored in t1 and get the : old values of only these columns to insert into a new table .
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Oct 26, 2010
I am creating triggers for audit operation when any insert/update/delete happens on a table automatically.Now i need the same functionality in procedure.
My requirement is to create procedure for all those triggers.
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Jul 18, 2013
There are two servers A and B ,and i am maintaining one table suppose table1 and another table suppose table2 , DML triggers are made for both of these tables.The action of DML trigger is that the movement we are inserting values , suppose a table1 on server A so automatically the same set of value in table2 on server Bso my problem is that the movement i inserted value on table1 on server A ,
the same set of values were inserted into table2 of server B and as the values were inserted intotable2 , the same set of values were inserted into the tabld1 because of the trigger. How to stop the non ending loop which occurs due to the simultaneous firing of triggers and insertion of same records into both the table endlessly...
version :---Personal Oracle Database 10g Release 10.2.0.3.0 TNS for 32-bit Windows: Version 10.2.0.3.0
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Jan 11, 2011
I'm having a bit of a problem getting the syntax of a trigger right. Unfortunately, I have no DBAs locally, I use some third party software, and for reasons beyond my understanding, I have been told to use triggers, and not stored procedures, so I'm running with it.
The set up:
STRUCTURES table: contains several columns, one of which is the unique ID column.
ASSAY table: contains several rows, also with the same ID column, but can have more than one row per ID (several assays per compound). One column is XC_ASSAYS.
The idea of the trigger is basically: When a row in the ASSAYS table is updated, pull out the ID of the row, then calculate the average of the XC_ASSAYS columns for those rows, and report it to the STRUCTURES.XC_ASSAY column for that row ID.
My best attempt thus far results in compilation errors.
CREATE TRIGGER INHIB_W_ALA_TR
AFTER INSERT OR UPDATE ON ASSAYS
FOR EACH ROW
BEGIN
UPDATE STRUCTURES SET XC_ASSAY = (SELECT AVG(XC_ASSAY) FROM ASSAYS WHERE ASSAYS.ID = :NEW.ID) WHERE STRUCTURES.ID = :NEW.ID
END;
/
The resulting errors are:
LINE/COL ERROR
-------- -----------------------------------------------------------------
2/1 PL/SQL: SQL Statement ignored
2/190 PL/SQL: ORA-00933: SQL command not properly ended
12/0 PLS-00103: Encountered the symbol "end-of-file" when expecting
[code]...
I don't understand some of the errors, such as why line 2 SQL is ignored (it seems correct?), or I'm supposed to properly terminate the trigger (I've read ; and /, but I'm getting the end-of-file errors when I do so). Tried shuffling syntax and ' or " around - and I can't get it.The body SQL works when I replace :NEW.ID with an actual variable (such as 'NMP12'), but I'm not sure how to pass the ID variable from the updated row into the body. The ID is not updated, but other columns are.
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Apr 29, 2013
I have a question about GG Sequence Replication and Triggers. My main database, which I would like to replicate on another server, is highly dependent on sequences for assigning surrogate keys to every row in every table in the application. I know that I need to add Sequence support to my source database (plus supplemental logging, etc), but I'm curious about the target database.
I do not anticipate allowing Read/Write access to this database - we are migrating from 10.2.0.4 (source) to 11.2.0.3 (target) on a new platform, and I want to keep the 11g database up-to-date with our production data until it is time to begin the actual conversion of our application. My thinking is that if I use the SUPPRESSTRIGGERS dboption in my Replicat session, this should take care of the use of the Sequences for assigning the surrogate key values, and the data should add to the tables normally without any intervention by the sequences/trigger combination. I know I will have to manually "correct" the sequences on my 11.2.0.3 database whenever I want to open this database up for use, but I have a script for this ready to go.
Also, in my source database, I am using Oracle Context indexes for generic name searching - this feature creates a number of DR$ named tables in the main application schema that I am replicating (approximately 50 of them). I am assuming that I should EXCLUDE these tables from the replication, as the context indexing should automatically update them as changes to the underlying data are applied via the replication of the indexed tables.
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Sep 5, 2010
why when-mouse move,up,enter,leave are not working in oracle forms 10g except when-mouse-click and when-mouse-doubleclick on any items.
what i need to do to execute this triggers..
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Dec 12, 2012
can change the order of triggers in forms 6i . that means firing in form level?
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