Error Handling In Stored Procedures In Sybase
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By default, Watcom-SQL dialect procedures exit when they encounter an error, returning SQLSTATE and SQLCODE values to the calling environment. You can build explicit error handling into Watcom-SQL exception handling in sybase stored procedure stored procedures using the EXCEPTION statement, or you can instruct the procedure writing stored procedures sybase to continue execution at the next statement when it encounters an error, using the ON EXCEPTION RESUME statement. When stored procedures in sybase with examples a Transact-SQL dialect procedure encounters an error, execution continues at the following statement. The global variable @@error holds the error status of the most recently executed statement. You can check
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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 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 db2 stored procedure error handling @status = proc_sample IF @status = 0 PRINT 'procedure succeeded' ELSE PRINT 'procedure failed' This table describes the built-in procedure return values and their meanings: Built-in procedure return valuesValue 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. Using the RAISERROR Statement in Procedures The RAISERROR statement is a Transact-SQL statement for generating user-defined errors. It has a similar function to the SIGNAL statement. Transact-SQL-like Error Handling in the Watcom-SQL Dialect You can make a Watcom-SQL dialect procedure handle errors in a Transact-SQL-like manner. Parent topic: Compatibility with Other Sybase Databases Created June 28, 2012. Send feedback on this help topic to Sybase Technical Publications: pubs@sybase.com
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just like you, helping each other. Join them; it only takes a minute: Sign up How to do error handling in Stored procedure up vote 3 down vote favorite I am using Sybase ASE 12.5 at http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc38151.1540/doc/html/san1278453590072.html the moment. I have a code below: create procedure test_launcher_fail_wrapper as begin select convert(numeric(2),1234345) if @@error != 0 begin select "SP failed to execute" return 1 end end Here, I am trying to convert a very large value/amount (1234345) to Numeric size 2. Which is not possible and it generates error. Questions: Is having @@error useful here? I ran this SP and it never went into error handling How to error handle these kind http://stackoverflow.com/questions/9582885/how-to-do-error-handling-in-stored-procedure of scenarios? tsql stored-procedures error-handling sybase-ase share|improve this question edited Mar 6 '12 at 11:40 skaffman 277k63617654 asked Mar 6 '12 at 8:02 Meet Agrawal migrated from programmers.stackexchange.com Mar 6 '12 at 11:33 This question came from our site for professional programmers interested in conceptual questions about software development. Why the close votes. Its a very good and definite question with hopefully some interesting answers. SQL procedures are programs and error handling is a known problem area. –James Anderson Mar 6 '12 at 8:59 1 Belongs on stackoverflow –ammoQ Mar 6 '12 at 9:09 forgive my ignorance. But if this question belongs to different forum than can the Admin move it. Don't want to cross post. –Meet Agrawal Mar 6 '12 at 9:57 its not within a try and catch block? –jumpingcode Mar 6 '12 at 10:02 Meet - the question can be migrated. –ChrisF♦ Mar 6 '12 at 10:35 | show 1 more comment 3 Answers 3 active oldest votes up vote 0 down vote I treat error handling in procs similarly to error handling in applications -- if there's an opportunity for you to contribute some actual value by handling the error, then by all means, do so, but if you can't really do anything to help, then y
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 more about Stack Overflow the company Business Learn more about hiring developers or posting http://stackoverflow.com/questions/12808846/error-handling-in-sybase ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join http://stackoverflow.com/questions/23933273/sybase-stored-procedure-exception-handling 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 Error Handling in Sybase up vote 2 down vote favorite Is there a way to handle errors in SYBASE, such as the TRY-CATCH block you can use in MS SQL Server, Oracle, etc? I've searched the web stored procedure and the only option I found was the global variable @@error, but it didn' work as I expected, for example, the following code: begin tran update table1 set name = 'new name' where name = 'old name' update table2 set id = 1 where id = 30 -- suppose id has a unique constraint and there's already a row with id = 1 IF @@error = 0 begin print 'commited' commit end else begin print 'rolled back' rollback end The will indeed stored procedure error rollback somehow, because the name I've changed on table1 keeps the old value as I've tested here, but it doesn't print the messages, or execute any instructions I put after the instructions that causes the error Can anyone help me in this? Do you know how does Sybase error handling actually works? sql try-catch sybase share|improve this question edited Jul 26 at 17:41 asked Oct 9 '12 at 21:41 drigoangelo 931110 you could setup an if block on the update so that there wouldn't be an error. if(not exists(select 1 from table2 where id = 1))begin/* your update code here*/end –scrappedcola Oct 9 '12 at 22:11 Thanks for your reply, but I need to do something like that in a script that will execute a lot of inserts/updates and a lot of constraints could be violated, so the validations would take a huge amount of code. Also, without these validations the script already have more than 1200 lines of code, so a try-catch block or something like that would be more fitting, but as it seems it's not possible, so I'm thinking about just letting sybase roll back the transaction in case of error by itself. –drigoangelo Oct 10 '12 at 12:23 Try taking a look at the 'sp_addmessage' command that allows you to define your own error messages, and the 'raiserror' command that allows you to call those errors, and set the value of @@error. –Mich
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 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 a minute: Sign up Sybase stored procedure exception handling up vote 2 down vote favorite I am new to sybase. After studying a bit I came to know following is the correct way to handle error/exceptions in sybase stored procedure. CREATE PROCEDURE dbo.sp_testErrorHandling (@age varchar(20)) AS BEGIN DECLARE @myerr int BEGIN TRANSACTION mytrans DELETE FROM TestStoredProc where Name='Z' IF @@error<>0 BEGIN SELECT @myerr=@@error GOTO failed END DECLARE @result int EXECUTE @result = 5/0 /* throws an exception */ IF @@error<>0 BEGIN SELECT @myerr=@@error GOTO failed END COMMIT TRANSACTION mytrans RETURN 0 failed: ROLLBACK TRANSACTION mytrans return @myerr END I thought, this stored procedure would return the error code correspondin to exception devision by zero. But actually it is throwing exception. Please help me to undestand the behaviour. Regards, Anirban Anirban exception stored-procedures error-handling sybase share|improve this question edited May 30 '14 at 12:27 asked May 29 '14 at 12:24 Anirban Paul 2491416 add a comment| active oldest votes Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Facebook. Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Browse other questions tag