Here we get correct result without getting mutating table error. The reason i am trying to insert 20 ipaddress is, the application will then allow only those logging on the application from those addresses only. Example: Given the trees: 0 2 | / \ 1 3 6 / \ 4 5 we should have the edges (descendent -> ancestor): 0->0 1->0 2->2 3->3 3->2 4->4 4->3 There are exceptions to this rule about views being inherently updateable.
I "dumbed" down the example too much that's why there does not seem to be need for pipelined function. Back to the Top. 9 comments, read/add them... Now, let me tell you how to achieve your goal *safely*" that is why, data integrity is something I have a keen interest in personally. This creates inconsistency and Oracle throws a mutating error. http://dba.stackexchange.com/questions/5432/what-are-the-causes-and-solutions-for-mutating-table-errors
Steve Callan has these notes on the ORA-04091 error: "Here is a problem many developers run into: ORA-04091 table owner.table_name is mutating, trigger/function may not see it. Since its an after update trigger, the trigger would use the updated values for the rows updated so far. 2. The database allows up to 32 triggers to cascade at simultaneously.
For example, 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 - an CREATE TABLE tab1 ( id NUMBER(10) NOT NULL, description VARCHAR2(50) NOT NULL ); ALTER TABLE tab1 ADD ( CONSTRAINT tab1_pk PRIMARY KEY (id) ); CREATE SEQUENCE tab1_seq; CREATE TABLE tab1_audit ( END IF; The first condition evaluates to TRUE only if the statement that fired the trigger is an INSERT statement; the second condition evaluates to TRUE only if the statement that For example, the database can capture server errors by defining a trigger on the database server error event.
Thanks al ot. CREATE OR REPLACE TRIGGER TUA_TEST AFTER UPDATE OF STATUS ON TEST FOR EACH ROW DECLARE v_Count NUMBER; BEGIN SELECT count(*) INTO v_count FROM TEST WHERE status = ‘INVALID’; dbms_output.put_line(‘Total Invalid Objects For SCHEMA LOGON triggers, if the user logging on is the trigger owner or has ALTER ANY TRIGGER privileges then logon is permitted. https://decipherinfosys.wordpress.com/2009/06/22/mutating-tabletrigger-error-and-how-to-resolve-it/ A trigger defined on a schema fires for each event associated with the owner of the schema (the current user).
Declarative constraints are checked at various times with respect to row triggers. But to use a statement level trigger, some data may need to be preserved from each row, to be used by the statement level trigger. Thank you Reply Balachandar R said January 10, 2011 at 10:17 am Very much useful. After the trigger is created, following SQL statement fires the trigger once for each row that is updated, in each case printing the new salary, the old salary, and the difference
[email protected]> insert into emp values ( 3, 3000 ); 1 row created. my response However, because the table A is mutating due to the CASCADE DELETE foreign key, this query is not allowed by Oracle. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Then developers can keep this in mind and code accordingly.
Thanks a lot.. and access GeekInterview anytime... He could have done one of the following: Changed the trigger to an after trigger. it sounds like: a) if a user is in the database group, they may have as many jobs as they like.
SQL> Two common reasons to use compound triggers are: To accumulate rows destined for a second table so that you can periodically bulk-insert them (as in Compound Trigger Example) To avoid 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 Thanks very much. Only the trigger action is rolled back and an error is logged in the trace files and alert log.
This can also happen when a trigger on a parent table causes an insert on a child table referencing a foreign key. That is the only problem with this technique for foreign key updates. This is one example of its use.
Oracle can not return the expected result and therefore throws the error. However, pay special attention when invoking remote subprograms from within a local trigger. For more information about using the BULK COLLECT clause with the FORALL statement, see Using FORALL and BULK COLLECT Together. Looks like concurrent operations would either conflict or be commutative to me.
It is worthwhile to note that this ORA-04091 error occurs not only in the "pure" database development environment, but also in the Oracle tools type of development environment such as Oracle Have them each insert 38000 as the salary. Solution 2 (Global Temporary Table) An alternative strategy is to use a Global Temporary Table (GTT) in place of the collection. Alessandro Followup May 30, 2006 - 10:09 am UTC http://download-east.oracle.com/docs/cd/B19306_01/appdev.102/b14251/adfns_triggers.htm#sthref1286
A mutating table is a table that is being modified by an UPDATE, DELETE, or INSERT statement, or
Let’s create a compound trigger first:
CREATE OR REPLACE TRIGGER TEST_TRIG_COMPOUND
COMPOUND TRIGGER /* Declaration Section*/ v_count NUMBER; AFTER EACH ROW IS Oracle could return the result consistent with a point in time just before the beginning of the statement but from most of the examples I have seen that try to implement My answer was "avoid mutating table error by fixing the logic". June 30, 2005 - 6:15 am UTC Reviewer: A reader hallo monahad, decalre i number(10); begin select max(sal) into i from emp; -- <<-- THIS IS A QUERY if i>4000 then
thanks alot Followup June 30, 2005 - 9:52 am UTC see above. The example you wanted.... The parent correlation name is meaningful and valid only inside a nested table trigger. A trigger can not change a table that it has read from.
In addition, checking of the foreign key is deferred until at least the end of the parent statement. But shouldnt it be that way? in that trigger, called as PART OF THE PROCESSING of an insert statement, you are reading the table you are modifying. What would happen if two people do work at the same time and cannot see eachothers modifications (and of course do not block either).
For example, if table p has three rows with the values (1), (2), (3), and table f also has three rows with the values (1), (2), (3), then the following statement