On-error Sql-error
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SQL statements in the program. Any SQL syntax error is detected and reported at sql server @@error compile time, before the report is run. When you use
Sql Server Error_message
dynamic SQL, SQR cannot check the syntax until runtime. In that case, the content of the $sql-error in sqr dynamic variable is used to construct the SQL statement, which can allow syntax errors to occur in runtime. Errors could occur if the dynamic variables
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that are selected or used in a WHERE or ORDER BY clause are incorrect. SQR traps any runtime error, reports the error, and ends the program. To change this default behavior, use the ON-ERROR option of the BEGIN-SELECT or BEGIN-SQL paragraphs: begin-select on-error=give_warning [$col1] &column1=char (,1) [$col2] &column2=char (,#pos) position (+1) from sql error checker customers order by [$my_order] end-select In this sample program, if a database error occurs, SQR invokes a procedure called give_warning instead of reporting the problem and ending. Write this procedure like this: begin-procedure give_warning display 'Database error occurred' display $sql-error end-procedure ! give_warning This procedure displays the error message but does not stop running the program. Instead, the program continues at the statement immediately following the SQL or SELECT paragraph. Note the use of the $sql-error variable, which is a special SQR-reserved variable. It contains the error message text from the database and is automatically set by SQR after a database error occurs. SQR has a number of reserved, or predefined, variables. For example, the $sqr-program variable has the name of the program that is running. The $username variable has the user name that was used to sign in to the database. The #page-count variable has the page number for the current page.
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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 http://stackoverflow.com/questions/11141814/bad-practice-to-use-sql-servers-goto-for-error-handling hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask http://www.sommarskog.se/error-handling-II.html Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Bad practice to use SQL Server's GOTO for error handling? up vote 6 down vote favorite I was reading about error handling in SQL Server in this article, and they suggest sql server using SQL Server's GOTO in certain situations to roll back the transaction. Example: BEGIN TRAN UPDATE Authors SET Phone = '415 354-9866' WHERE au_id = '724-80-9391' SELECT @intErrorCode = @@ERROR IF (@intErrorCode <> 0) GOTO PROBLEM UPDATE Publishers SET city = 'Calcutta', country = 'India' WHERE pub_id = '9999' SELECT @intErrorCode = @@ERROR IF (@intErrorCode <> 0) GOTO PROBLEM COMMIT TRAN PROBLEM: IF (@intErrorCode <> 0) BEGIN PRINT 'Unexpected error occurred!' ROLLBACK TRAN END This article was written sql server @@error nearly 10 years ago and I've heard that it's usually a bad idea to use GOTO. Is the above an ok method for error handling in SQL Server? If not, can anyone suggest a better alternative? sql sql-server error-handling goto share|improve this question asked Jun 21 '12 at 15:44 Abe Miessler 44k42188332 Did you check this answer? –Helper Jun 24 '12 at 5:01 add a comment| 2 Answers 2 active oldest votes up vote 13 down vote accepted You should be using Try/Catch in SQL 2005+ BEGIN TRY BEGIN TRAN UPDATE Authors SET Phone = '415 354-9866' WHERE au_id = '724-80-9391' UPDATE Publishers SET city = 'Calcutta', country = 'India' WHERE pub_id = '9999' COMMIT TRAN END TRY BEGIN CATCH PRINT 'Unexpected error occurred!' IF XACT_STATE() <> 0 ROLLBACK TRAN END CATCH share|improve this answer edited Jun 22 '12 at 15:35 answered Jun 21 '12 at 15:45 SliverNinja 20.3k85592 add a comment| up vote 4 down vote You must incorporate SET XACT_ABORT ON in Exception handling Begin Try SET XACT_ABORT ON BEGIN TRAN UPDATE Authors SET Phone = '415 354-9866' WHERE au_id = '724-80-9391' UPDATE Publishers SET city = 'Calcutta', country = 'India' WHERE pub_id = '9999' COMMIT TRAN End Try Begin Catch Rollback Tran End Catch share|improve this answer edited Jun 24 '12 at 5:00 answered Jun 22 '12 at 8:52 Helper 2,788749100 add a comment| Your Answer draft s
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 error handling in SQL Server and ADO. That article is in some sense part one in the series. However, you can read this article without reading the background article first, and if you are not a very experienced 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 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 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.