Error Handling Stored Procedure Sybase
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triggers, and batches » Errors and warnings in procedures and triggers Using exception handlers in procedures and triggers It is often desirable to intercept certain types of errors and handle them within a sybase stored procedure exception handling procedure or trigger, rather than pass the error back to the calling environment. This transact sql error handling is done through the use of an exception handler. You define an exception handler with the EXCEPTION part of a compound sample stored procedure sybase statement. See Using compound statements. Whenever an error occurs in the compound statement, the exception handler executes. Unlike errors, warnings do not cause exception handling code to be executed. Exception handling code also executes if
Stored Procedure In Sybase Example
an error appears in a nested compound statement or in a procedure or trigger invoked anywhere within the compound statement. An exception handler for the interrupt error SQL_INTERRUPT, SQLSTATE 57014 should only contain non-interruptible statements such as ROLLBACK and ROLLBACK TO SAVEPOINT. If the exception handler contains interruptible statements that are invoked when the connection is interrupted, the database server stops the exception handler at the first interruptible statement and oracle stored procedure error handling returns the interrupt error. The demonstration procedures used to illustrate exception handling are based on those used in Default error handling in procedures and triggers. In this example, additional code handles the column not found error in the InnerProc procedure. DROP PROCEDURE OuterProc; DROP PROCEDURE InnerProc; CREATE PROCEDURE OuterProc() BEGIN MESSAGE 'Hello from OuterProc.' TO CLIENT; CALL InnerProc(); MESSAGE 'SQLSTATE set to ', SQLSTATE,' in OuterProc.' TO CLIENT END; CREATE PROCEDURE InnerProc() BEGIN DECLARE column_not_found EXCEPTION FOR SQLSTATE '52003'; MESSAGE 'Hello from InnerProc.' TO CLIENT; SIGNAL column_not_found; MESSAGE 'Line following SIGNAL.' TO CLIENT; EXCEPTION WHEN column_not_found THEN MESSAGE 'Column not found handling.' TO CLIENT; WHEN OTHERS THEN RESIGNAL ; END; CALL OuterProc(); The Interactive SQL Messages tab then displays the following: Hello from OuterProc. Hello from InnerProc. Column not found handling. SQLSTATE set to 00000 in OuterProc. The EXCEPTION clause declares the exception handler. The lines following EXCEPTION do not execute unless an error occurs. Each WHEN clause specifies an exception name (declared with a DECLARE statement) and the statement or statements to be executed in the event of that exception. The WHEN OTHERS THEN clause specifies the statement(s) to be executed when the exception that occurred does not appear in the preceding WHEN clauses. In this example,
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 db2 stored procedure error handling stored procedures using the EXCEPTION statement, or you can instruct the procedure
Sql Server Stored Procedure Error Handling
to continue execution at the next statement when it encounters an error, using the ON EXCEPTION RESUME statement. When
Mysql Stored Procedure Error Handling
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 http://dcx.sybase.com/1101/en/dbusage_en11/pteweh.html 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 http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc38151.1540/doc/html/san1278453590072.html @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
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 http://stackoverflow.com/questions/12808846/error-handling-in-sybase Stack Overflow the company Business Learn more about hiring developers or posting ads with http://stackoverflow.com/questions/23933273/sybase-stored-procedure-exception-handling 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 Error Handling in Sybase up vote 2 down vote favorite Is there a way stored procedure 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 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 stored procedure error -- 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 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 b
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 tagged exception stored-procedures error-handling sybase or ask your own question. asked 2 years ago viewed 1600 times Related 331Select columns from result set of stored procedure1009Insert results of a stored procedure into a temporary table0Missing object in Sybase stored procedure0Jython ziclix JDBC, get stored procedure return value - Chained Transaction Mode0Creating Stored Procedure Error Sybase0How to handle a transaction in Sybase ASE?1SELECT and TRUNCATE in Sybase stored procedur