Error Handling In Stored Procedures Oracle
Contents |
Churchill Run-time errors arise from design faults, coding mistakes, hardware failures, and many other sources. Although you cannot anticipate all possible errors, you can plan oracle stored procedure exception to handle certain kinds of errors meaningful to your PL/SQL program. With many oracle stored procedure exception no data found programming languages, unless you disable error checking, a run-time error such as stack overflow or division by zero
Oracle Stored Procedure Exception When Others
stops normal processing and returns control to the operating system. With PL/SQL, a mechanism called exception handling lets you "bulletproof" your program so that it can continue operating in the presence
Oracle Stored Procedure Exception Rollback
of errors. This chapter discusses the following topics: Overview of PL/SQL Error Handling Advantages of PL/SQL Exceptions Predefined PL/SQL Exceptions Defining Your Own PL/SQL Exceptions How PL/SQL Exceptions Are Raised How PL/SQL Exceptions Propagate Reraising a PL/SQL Exception Handling Raised PL/SQL Exceptions Tips for Handling PL/SQL Errors Overview of PL/SQL Error Handling In PL/SQL, a warning or error condition is called an exception. oracle sqlerrm Exceptions can be internally defined (by the run-time system) or user defined. Examples of internally defined exceptions include division by zero and out of memory. Some common internal exceptions have predefined names, such as ZERO_DIVIDE and STORAGE_ERROR. The other internal exceptions can be given names. You can define exceptions of your own in the declarative part of any PL/SQL block, subprogram, or package. For example, you might define an exception named insufficient_funds to flag overdrawn bank accounts. Unlike internal exceptions, user-defined exceptions must be given names. When an error occurs, an exception is raised. That is, normal execution stops and control transfers to the exception-handling part of your PL/SQL block or subprogram. Internal exceptions are raised implicitly (automatically) by the run-time system. User-defined exceptions must be raised explicitly by RAISE statements, which can also raise predefined exceptions. To handle raised exceptions, you write separate routines called exception handlers. After an exception handler runs, the current block stops executing and the enclosing block resumes with the next statement. If there is no enclosing block, control returns to the host environment. In the example below, you calculate
12, 2011 - 11:33 am UTC Category: Developer – Version: 8.1.7 Latest Followup You Asked Hi Tom, I am in the process of designing an error handling and failure notification system for use by our all our custom
User Defined Exception In Oracle
PL/SQL programs. My plan is that all our custom PL/SQL programs, in the case of exception handling in oracle 11g a fatal error, will call a single error handling procedure from within it's "WHEN OTHERS" exception clause. The intent is that we oracle exception when others will have a centralized, standard, efficient error handling system, particularly an error notification system whereby the appropriate people will automatically be notified in case their program fails. This error handling procedure will receive parameters such as: https://docs.oracle.com/cd/B10500_01/appdev.920/a96624/07_errs.htm calling program, sqlerrm, key variable values at time of error, etc. The error handling procedure will then send an e-mail notification to the appropriate person (based on the program that failed), write a formatted error messege to the appropriate location based on the failed program, and bail out. I have some questions, please regarding this. 1. Do you like this idea philosophically and practically (i.e. having a centralized error handling and notification https://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:4684561825338 procedure/system) ? if not why? 2. I am concerned that by calling a procedure inside the exception clause, even though I am passing the current error info (sqlerrm, sqlcode)... I am afraid I may be losing some error info or masking some error info. I am wondering if I am losing anything by not dumping the original error immediatly, while it is 'fresh', instead of passing the 'sqlerrm' to another procedure... is this a valid concern ? why or why not ? 3. Can I count on 'format_error_stack' to give me the failing program's error or should I insist they pass this (e.g. sqlerrm) in to the error handling procedure? 4. Do you have a better way to implement a centralized error handling and notification system; or do you have any other comments, suggestions, critisisms regarding my idea ? Thanks for your valuable expertise. Please answer the questions as detailed as possible. Thanks, Robert. and we said... 1) no, not really. Here is why. I believe this common routine would HAVE to call "raise;" to re-raise the error (else the caller of the procedure has NO CLUE that an error happened. Dont say "we'll use return codes -- that defeats the entire purpose of exceptions") So, if this common routine has to re-raise the exception (
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn http://stackoverflow.com/questions/7596860/stored-procedure-exception-handling more about Stack Overflow the company Business Learn more about hiring developers or https://www.techonthenet.com/oracle/exceptions/when_others.php 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 a minute: Sign up Stored procedure exception handling up vote 1 down vote stored procedure favorite 1 SQL> DECLARE 2 TotalUpd NUMBER(36) := 0; 3 BEGIN 4 dbms_output.put_line ('Job Start time............... : ' || to_char(SYSDATE, ' hh24:mi:ss')); 5 UPDATE Asset SET _status = 'PROGRESS' WHERE status is null; 6 TotalUpd := SQL%ROWCOUNT; 7 dbms_output.put_line('Total Records Updated. : ' || TotalUpd); 8 COMMIT; 9 EXCEPTION 10 WHEN NO_DATA_FOUND THEN 11 dbms_output.put_line ('No more data to update.'); 12 WHEN OTHERS THEN 13 dbms_output.put_line ('Error while oracle stored procedure status as SUCCESS '); 14 END ; 15 / The result for the above procedure is Job Start time............... : 04:41:41 Total Records Updated. : 0 But my expected result is "No more row to be updated" must be printed,since i have truncated the table Asset.Please tell where I went wrong in this. oracle plsql oracle10g oracle11g share|improve this question edited Sep 29 '11 at 12:08 Ollie 11.4k22848 asked Sep 29 '11 at 11:47 user472625 502413 add a comment| 4 Answers 4 active oldest votes up vote 3 down vote accepted it is as simple as the update does not geneate an error if there is no data. you need to look at the value of TotalUpd if you want to control the flow of your code DECLARE TotalUpd NUMBER(36) := 0; BEGIN dbms_output.put_line ('Job Start time............... : ' || TO_CHAR(SYSDATE, ' hh24:mi:ss')); UPDATE Asset SET _status = 'PROGRESS' WHERE status IS null; TotalUpd := SQL%ROWCOUNT; IF TotalUpd = 0 THEN dbms_output.put_line ('No more data to update.'); ELSE dbms_output.put_line('Total Records Updated. : ' || TotalUpd); END IF; COMMIT; EXCEPTION WHEN OTHERS THEN dbms_output.put_line ('Error while status as SUCCESS '); END; share|improve this answer answered Sep 29 '11 at 11:56 Kevin Burto
Server MySQL MariaDB PostgreSQL SQLite MS Office Excel Access Word Web Development HTML CSS Color Picker Languages C Language More ASCII Table Linux UNIX Java Clipart Techie Humor Advertisement Oracle Basics Oracle Advanced Oracle Cursors Oracle Exception Handling Named Programmer-Defined Exception Named System Exception WHEN OTHERS Clause SQLCODE SQLERRM Oracle Foreign Keys Oracle Loops/Conditionals Oracle Transactions Oracle Triggers String/Char Functions Numeric/Math Functions Date/Time Functions Conversion Functions Analytic Functions Advanced Functions NEXT: SQLCODE Oracle / PLSQL: WHEN OTHERS Clause This Oracle tutorial explains how to use the Oracle WHEN OTHERS clause with syntax and examples. What is the WHEN OTHERS clause in Oracle? The WHEN OTHERS clause is used to trap all remaining exceptions that have not been handled by your Named System Exceptions and Named Programmer-Defined Exceptions. Syntax We will take a look at the syntax for the WHEN OTHERS clause in both procedures and functions. Syntax for Procedures The syntax for the WHEN OTHERS clause in a procedure is: CREATE [OR REPLACE] PROCEDURE procedure_name [ (parameter [,parameter]) ] IS [declaration_section] BEGIN executable_section EXCEPTION WHEN exception_name1 THEN [statements] WHEN exception_name2 THEN [statements] WHEN exception_name_n THEN [statements] WHEN OTHERS THEN [statements] END [procedure_name]; Syntax for Functions The syntax for the WHEN OTHERS clause in a function is: CREATE [OR REPLACE] FUNCTION function_name [ (parameter [,parameter]) ] RETURN return_datatype IS | AS [declaration_section] BEGIN executable_section EXCEPTION WHEN exception_name1 THEN [statements] WHEN exception_name2 THEN [statements] WHEN exception_name_n THEN [statements] WHEN OTHERS THEN [statements] END [function_name]; Example Here is an example of a procedure that uses a WHEN OTHERS clause: CREATE OR REPLACE PROCEDURE add_new_order (order_id_in IN NUMBER, sales_in IN NUMBER) IS no_sales EXCEPTION; BEGIN IF sales_in = 0 THEN RAISE no_sales; ELSE INSERT INTO orders (order_id, total_sales ) VALUES ( order_id_in, sales_in ); END IF; EXCEPTION WHEN DUP_VAL_ON_INDEX THEN raise_application_error (-20001,'You have tried to insert a duplicate order_id.'); WHEN no_sales THEN raise_application_error