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Error Handling In Oracle Trigger

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are called exceptions. Note: The language of warning and error messages depends on the NLS_LANGUAGE parameter. For information about this parameter, see Oracle Database Globalization Support Guide. Topics Compile-Time oracle trigger exception handling Warnings Overview of Exception Handling Internally Defined Exceptions Predefined Exceptions User-Defined Exceptions Redeclared Predefined oracle trigger exception raise_application_error Exceptions Raising Exceptions Explicitly Exception Propagation Unhandled Exceptions Error Code and Error Message Retrieval Continuing Execution After Handling Exceptions Retrying Transactions

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After Handling Exceptions See Also: "Exception Handling in Triggers" "Handling FORALL Exceptions After FORALL Statement Completes" Tip: If you have problems creating or running PL/SQL code, check the Oracle Database trace files. The USER_DUMP_DEST

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initialization parameter specifies the current location of the trace files. You can find the value of this parameter by issuing SHOW PARAMETER USER_DUMP_DEST. For more information about trace files, see Oracle Database Performance Tuning Guide. Compile-Time Warnings While compiling stored PL/SQL units, the PL/SQL compiler generates warnings for conditions that are not serious enough to cause errors and prevent compilation—for example, using a deprecated PL/SQL feature. To see oracle trigger exception when others warnings (and errors) generated during compilation, either query the static data dictionary view *_ERRORS (described in Oracle Database Reference) or, in the SQL*Plus environment, use the command SHOW ERRORS. The message code of a PL/SQL warning has the form PLW-nnnnn. For the message codes of all PL/SQL warnings, see Oracle Database Error Messages. Table 11-1 summarizes the categories of warnings. Table 11-1 Compile-Time Warning Categories Category Description Example SEVERE Condition might cause unexpected action or wrong results. Aliasing problems with parameters PERFORMANCE Condition might cause performance problems. Passing a VARCHAR2 value to a NUMBER column in an INSERT statement INFORMATIONAL Condition does not affect performance or correctness, but you might want to change it to make the code more maintainable. Code that can never run By setting the compilation parameter PLSQL_WARNINGS, you can: Enable and disable all warnings, one or more categories of warnings, or specific warnings Treat specific warnings as errors (so that those conditions must be corrected before you can compile the PL/SQL unit) You can set the value of PLSQL_WARNINGS for: Your Oracle database instance Use the ALTER SYSTEM statement, described in Oracle Database SQL Language Reference. Your session Use the ALTER SESSION statement, described in Oracle Database SQL Language Refere

of triggers with PL/SQL code and the use of database triggers with Oracle Database Express Edition. This section contains the following topics:

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Overview of Triggers Designing Triggers Managing Triggers in the Database See Also: oracle trigger example Oracle Database Concepts for conceptual information about triggers Oracle Database Application Developer's Guide - Fundamentals for information oracle trigger tutorial about coding triggers Oracle Database SQL Reference for information about the CREATE TRIGGER SQL statement Overview of Triggers A database trigger is a stored procedure associated with a database table, https://docs.oracle.com/cloud/latest/db112/LNPLS/errors.htm view, or event. The trigger can be called once, when some event occurs, or many times, once for each row affected by an INSERT, UPDATE, or DELETE statement. The trigger can be called after the event, to record it, or take some follow-up action. The trigger can be called before the event, to prevent erroneous operations or fix new https://docs.oracle.com/cd/B25329_01/doc/appdev.102/b25108/xedev_triggers.htm data so that it conforms to business rules. The executable part of a trigger can contain procedural statements and SQL data manipulation statements. Triggers are created using the SQL CREATE TRIGGER statement. This statement can be used with Object Browser, SQL Script Editor, or SQL Command Line (SQL*Plus). The CREATE (or CREATE OR REPLACE) statement fails if any errors exist in the PL/SQL block. This section contains the following topics: Types of Triggers Naming Triggers When Is a Trigger Fired? Controlling When a Trigger Is Fired Accessing Column Values in Row Triggers Detecting the DML Operation That Fired a Trigger Enabled and Disabled Trigger Modes Error Conditions and Exceptions in the Trigger Body See Also: Oracle Database SQL Reference for information about trigger creation syntax Types of Triggers A trigger can be a stored PL/SQL or C procedure associated with a table, view, schema, or the database itself. Oracle Database XE automatically executes a trigger when a specified event takes place, which usually is a DML statement being issued against the table. The types of

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and http://stackoverflow.com/questions/18682341/how-to-raise-an-exception-inside-a-trigger-is-there-a-way-to-do-this policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes oracle trigger a minute: Sign up How to raise an Exception inside a Trigger? Is there a way to do this? up vote 4 down vote favorite There's a situation like: If the Salary column in updated with a value lesser than it's original value, print an error message and let the update NOT happen. This is what I've written so far: CREATE OR oracle trigger exception REPLACE TRIGGER TRIG1 BEFORE UPDATE OF SAL ON EMP for each row USER_XCEP EXCEPTION WHEN (NEW.SAL

 

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