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How do you resolve ORA 04091 table is mutating trigger function may not see it?
Avoiding Mutating triggers The Oracle mutating trigger error occurs when a trigger references the table that owns the trigger, resulting in the “ORA-04091: table name is mutating, trigger/function may not see it.” message. Don’t use triggers – The best way to avoid the mutating table error is not to use triggers.
Is mutating trigger function may not see it after insert?
Your trigger is AFTER UPDATE OR INSERT OR DELETE. Means if you run UPDATE OR INSERT OR DELETE statements on this table, the trigger will fire. You cannot modify the same table the trigger is firing on. The purpose of trigger is to fire automatically when table is updated, inserted or deleted in your case.
What triggers mutating?
A mutating table error (ORA-04091) occurs when a row-level trigger tries to examine or change a table that is already undergoing change (via an INSERT, UPDATE, or DELETE statement).
Can we use commit in trigger?
Yes, you can commit inside the trigger. But for this you have to make this trigger transaction to be an Independent transaction from its parent transaction, you can do this by using Pragma. Pragma AUTONOMOUS_TRANSACTION allow you to build the Independent (child) Transaction, started by another.
What does closing a cursor do?
After all rows have been retrieved from the result set that is associated with a cursor, the cursor must be closed. The result set cannot be referenced after the cursor has been closed. However, the cursor can be reopened and the rows of the new result set can be fetched.
Why COMMIT is not used in triggers?
Not only do triggers not need a COMMIT you can’t put one in: a trigger won’t compile if the body’s code includes a COMMIT (or a rollback). This is because triggers fire during a transaction. When the trigger fires the current transaction is still not complete.
Is the table in ora-04091 mutating?
ORA-04091: table is mutating, trigger/function may not see – Ask TOM Thanks for the question, Subhash. Viewed 50K+ times! This question is I am getting “ORA-04091: table is mutating, trigger/function may not see it” in my trigger.
How to resolve ora-04091 trigger may not see it?
I am getting “ORA-04091: table is mutating, trigger/function may not see it” in my trigger. Trigger is created. Please let me know how to resolve this. and we said… You can’t query the table that caused a trigger to fire inside the trigger itself. But in this case, I don’t see any need to.
Why do I get an error when I update a table in Oracle?
Specifically, the error results from the following operations: First, you update data to a table. Second, a row-level trigger associated with the table automatically fires and makes another change to the table. Let’s use the customers table from the sample database for demonstration.
Is there a way to fix the mutating table error?
To fix the mutating table error, you can use a compound trigger if you are using Oracle 11g and later. Note that if you’re using Oracle 10g or earlier, you need to use a package to fix the mutating table error, which we will not cover in this tutorial.