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ORA-4091 Mutating Table Explanation and Workarounds (Doc ID 74859.1)

Last updated on JANUARY 30, 2022

Applies to:

PL/SQL - Version to [Release 9.2 to 10.2]
Information in this document applies to any platform.


The following bulletin discusses concepts of cascade update, delete, and insert and how to avoid the mutating table error.

Note that in 11g, you can work around this using compound triggers

- see Using Compound Triggers to Avoid Mutating-Table Error

In Oracle� Database PL/SQL Language Reference, Chapter 9 Using Triggers


For users requiring the ability to cascade update, delete or insert whilst being able to maintain referential integrity between objects.


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