Error Handling In Sybase Database
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than pass the error back to the calling environment. This is done through the use of an sybase error handling in stored procedures exception handler. You define an exception handler with the EXCEPTION part
Exception Handling In Sybase
of a compound statement. Whenever an error occurs in the compound statement, the exception handler executes. Unlike error handling oracle errors, warnings do not cause exception handling code to be executed. Exception handling code also executes if an error appears in a nested compound statement or in error handling db2 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
Error Handling Sql Server
at the first interruptible statement and returns the interrupt error. An exception handler can use the SQLSTATE or SQLCODE special values to determine why a statement failed. Alternatively, the ERRORMSG function can be used without an argument to return the error condition associated with a SQLSTATE. Only the first statement in each WHEN clause can specify this information and the statement cannot be a compound statement. In this example, additional code handles the error about the column that cannot be found 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
By default, Watcom-SQL dialect procedures exit when they encounter an error, returning SQLSTATE and SQLCODE values to the calling environment. error handling mysql You can build explicit error handling into Watcom-SQL stored procedures sql 2005 error handling using the EXCEPTION statement, or you can instruct the procedure to continue execution at the next
Php Error Handling
statement when it encounters an error, using the ON EXCEPTION RESUME statement. When a Transact-SQL dialect procedure encounters an error, execution continues at the following http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc01771.1600/doc/html/saiq-pteweh.html 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 procedure completes execution, a http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc38151.1540/doc/html/san1278453590072.html 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' 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-
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 http://stackoverflow.com/questions/12808846/error-handling-in-sybase 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 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 error handling 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 rollback somehow, because the name I've changed on error handling in 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. –Michael Gardner Oct 10 '12 at 13:02 In my documentation on sybase-iq, I read the