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How do I fix an invalid trigger in Oracle?
Oracle provides mechanisms for automatically recompiling all the invalid objects in a schema.
- The most straightforward is to use DBMS_UTILITY. COMPILE_SCHEMA() .
- In 9i Oracle gave us a script $ORACLE_HOME/rdbms/admin/utlrp.
- In 10g they added the UTL_RECOMP package, which basically does everything that that script does.
How do I compile a trigger in Oracle?
Use the ALTER TRIGGER statement to recompile a trigger manually. Example: Recompiling a Trigger shows the use of the SQL ALTER TRIGGER statement to recompile the emp_log_update trigger.
How do you fix a mutating error?
Fixing the mutating table error
- First, declare an array of customer record that includes customer id and credit limit.
- Second, collect affected rows into the array in the row-level trigger.
- Third, update each affected row in the statement-level trigger.
What causes a mutating table / trigger error in Oracle?
A simple row level trigger that causes a mutating table error can result in a very complicated statement level trigger to achieve the needed result. Here are some important items to remember about triggers. On insert triggers have no :OLD values. On delete triggers have no :NEW values. Triggers do not commit transactions.
How to write on error trigger in Oracle Forms?
Writing On-Error Trigger In Oracle Forms. Suppose you want to handle an error in oracle forms and want to display custom error message for that error, but also you want to customize more for a particular error. For example, there are many fields in the form with required property is set to TRUE for Not Null check.
How often is a row trigger fired in Oracle?
A row trigger is fired each time the table is affected by the triggering statement. For example, if an UPDATE statement updates multiple rows of a table, a row trigger is fired once for each row affected by the UPDATE statement. If a triggering statement affects no rows, a row trigger is not run.
How does a trigger restriction work in Oracle?
In this way, you can create a single trigger that runs different code based on the type of statement that fires the trigger. A trigger restriction specifies a Boolean expression that must be true for the trigger to fire. The trigger action is not run if the trigger restriction evaluates to false or unknown.