Error Handling In Sybase Iq Stored Procedure
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handling is different in the Watcom-SQL and Transact-SQL dialects. By default, Watcom-SQL dialect procedures exit when they encounter an error, returning SQLSTATE exception handling in sybase stored procedure and SQLCODE values to the calling environment. You can build explicit
Oracle Stored Procedure Error Handling
error handling into Watcom-SQL stored procedures using the EXCEPTION statement, or you can instruct the procedure
Db2 Stored Procedure Error Handling
to continue execution at the next statement when it encounters an error, using the ON EXCEPTION RESUME statement. When a Transact-SQL dialect procedure encounters an error,
Sql Server Stored Procedure Error Handling
execution continues at the following statement. The global variable @@error holds the error status of the most recently executed statement. You can check this variable following a statement to force return from a procedure. For example, the following statement causes an exit if an error occurs: IF @@error != 0 RETURN When the mysql stored procedure error handling procedure completes execution, a return value indicates the success or failure of the procedure. This return status is an integer, and can be accessed as follows: DECLARE @status INT EXECUTE @status = proc_sample IF @status = 0 PRINT 'procedure succeeded' ELSE PRINT 'procedure failed' Table A-2 describes the built-in procedure return values and their meanings: Table A-2: Built-in procedure return values Value Meaning 0 Procedure executed without error -1 Missing object -2 Data type error -3 Process was chosen as deadlock victim -4 Permission error -5 Syntax error -6 Miscellaneous user error -7 Resource error, such as out of space -8 Nonfatal internal problem -9 System limit was reached -10 Fatal internal inconsistency -11 Fatal internal inconsistency -12 Table or index is corrupt -13 Database is corrupt -14 Hardware error The RETURN statement can be used to return other integers, with their own user-defined meanings. Copyright © 2009. Sybase Inc. All rights reserved. View this document as PDF
how you should implement error handling when you write stored procedures, including when you call them from ADO. The other article, Error Handling in SQL Server - a Background, gives a deeper description of the idiosyncrasies with sybase try catch example error handling in SQL Server and ADO. That article is in some sense part one @@error in sybase in the series. However, you can read this article without reading the background article first, and if you are not a very experienced sybase raiserror user of SQL Server, I recommend you to start here. In places there are links to the background article, if you want more information about a certain issue. Note: this article is aimed at SQL2000 and earlier versions http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc38151.1510/html/iqrefbb/Tseh.htm of SQL Server. SQL2005 offers significantly improved methods for error handling with TRY-CATCH. This article is not apt if you are using SQL 2005 or later. I don't have a complete article on error handling for SQL 2005, but I have an unfinished article with a section Jumpstart Error Handling that still can be useful. Table of Contents: Introduction The Presumptions A General Example Checking Calls to Stored Procedures The Philosophy of Error Handling General http://www.sommarskog.se/error-handling-II.html Requirements Why Do We Check for Errors? When Should You Check @@error? ROLLBACK or not to ROLLBACK - That's the Question SET XACT_ABORT ON revisited Error Handling with Cursors Error Handling with Triggers Error Handling with User-Defined Functions Error Handling with Dynamic SQL Error Handling in Client Code What to Do in Case of an Error? Command Timeouts Why is My Error Not Raised? Getting the Return Value from a Stored Procedure Acknowledgements and Feedback Revision History Introduction Error handling in stored procedures is a very tedious task, because T-SQL offers no exception mechanism, or any On Error Goto. All you have is the global variable @@error which you need to check after each statement for a non-zero value to be perfectly safe. If you call a stored procedure, you also need to check the return value from the procedure. In fact, this is so extremely tedious, so you will find that you will have to make compromises and in some situations assume that nothing can go wrong. Still, you cannot just ignore checking for errors, because ignoring an error could cause your updates to be incomplete, and compromise the integrity of your data. Or it can cause a transaction to run for much longer time than intended, leading to blocking and risk that the user loses all his updates when he logs out.
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/25086551/how-to-handle-a-transaction-in-sybase-ase more about Stack Overflow the company Business Learn more about hiring developers or http://www.dbforums.com/showthread.php?1009563-Error-Handling-in-stored-procedures 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 How to handle a transaction in Sybase ASE? up vote stored procedure 0 down vote favorite I have to insert records into a table in a test environment, so that I now know that it will throw a primary key constraint violation. And because of the scripts that will be run independantly by other people once the time to migrate from an environment to another, I wish to make my script rollback whenever it encounters a problem. My script is stored procedure error as follows: use my_db go -- -- No rows of the given "my_code" must exist, as they shall be replaced. -- if exists ( select 1 from my_table where my_code like 'my_code' ) delete from my_table where my_code like 'my_code' -- -- All rows shall be inserted altogether, or rejected altogether at once. -- begin tran a insert into my_table (field1, field2, field3) values (value1, value2, value3) if @@error != 0 or @@transtate != 0 begin rollback tran a end insert into my_table (field1, field2, field3) values (value1, value2, value3) if @@error != 0 or @@transtate != 0 begin rollback tran a end commit tran a go I have tried what I could get from these posts: Error Handling in Sybase How to continue executing rest of while loop even if an exception occurs in sybase? Transaction Handling in Sybase I have tried with only verifying @@error, @@transtate and both, and I always get the message box reporting the error, and no records are rolled back, that is, the passing rows are still inserted. I wonder whether there is a way to make sure that Sybase handles the transactions adequately as expected, or else, simply make sure it doesn't autocommit rows whe
sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 2 of 2 Thread: Error Handling in stored procedures Tweet Thread Tools Show Printable Version Subscribe to this Thread… Search Thread Advanced Search Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode 09-03-04,04:16 #1 BasOlij View Profile View Forum Posts Visit Homepage Registered User Join Date Feb 2003 Location Netherlands Posts 63 Unanswered: Error Handling in stored procedures Hey Everyone, Sorry if this has been asked before, seems the search is not responding to well today. Anyways, ran into the following problem. I have a stored procedure and it contains a query that in some cases can result in an error (converts a character field to a numeric field). Now I remember that after the query I can check @@error to see if it failed and react to it in a peacefull manner. It now seems though Sybase just stops executing my stored procedure and doesn't let me to do any cleanup resulting from the fault. I made a little test script to demonstrate my problem, hope someone can tell me how to do this correctly: Code: create table TMP_TEST ( TMP_CHAR varchar(250) null, TMP_NUMBER numeric(15) null ) drop procedure stp_test go create procedure stp_test as begin declare @lasterror integer insert TMP_TEST (TMP_CHAR, TMP_NUMBER) select "test",convert(numeric(15),"01abc") select @lasterror=@@error if (@lasterror<>0) begin return @lasterror end return 1000 end go declare @status integer exec @status=stp_test select @status Greetz, Bastiaan Olij Reply With Quote 09-03-04,12:58 #2 corral View Profile View Forum Posts Registered User Join Date Aug 2002 Location Madrid, Spain Posts 97 Unfortunately, you must take some measures to avoid a conversion error. These errors are a different kind than execution errors such as "duplicate key". Instead, they are evaluated in an earlier stage by ASE, and handled in a way closer to syntax errors than to run-time errors. My advice: don't include statements prone to conversion errors in stored procedures. Try to isolate them in stand-alone SQL statements whose errors are handled by your application. Regards, Mariano Corral Reply With Quote Quick Navigation Sybas