Mssql Error In Trigger
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Sql Trigger Error Message
DefinitionSolutionConclusionSee AlsoOther Languages Introduction The goal of this article is to provide a simple and easy to use error handling mechanism within triggers context.This article is completely compatible with SQL Server 2012 and 2014. Problem Definition Triggers are strange objects that have their own rules! First rule says that triggers are part of the invoking transaction (the transaction that fired them). Yes, this is True and it means that at the beginning of the trigger, both values of @@trancount and xact_state() are "1". So, if we use COMMIT or ROLLBACK inside thetrigger, their values will change to "0" just after executing these statements. Second strange rule is that if the transaction ended in the trigger, the database raises an abortion error. An example for this rule is executing COMMIT or ROLLBACK within the trigger. Next code shows these rules: -- create test table IF OBJECT_ID('dbo.Test', 'U') IS NOT NULL DROP TABLE dbo.Test ; GO CREATE TABLE dbo.Test ( Id INT IDENTITY PRIMA
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Set Xact_abort Off;
company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions sql server instead of update trigger Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 6.2 million t-sql throw programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to handle errors in a trigger? up vote 4 down vote favorite I'm writing some SQL code that needs http://social.technet.microsoft.com/wiki/contents/articles/22177.error-handling-within-triggers-using-t-sql.aspx to be executed when rows are inserted in a database table, so I'm using an AFTER INSERT trigger; the code is quite complex, thus there could still be some bugs around. I've discovered that, if an error happens when executing a trigger, SQL Server aborts the batch and/or the whole transaction. This is not acceptable for me, because it causes problems to the main application that uses the database; I also don't have the http://stackoverflow.com/questions/10462800/how-to-handle-errors-in-a-trigger source code for that application, so I can't perform proper debugging on it. I absolutely need all database actions to succeed, even if my trigger fails. How can I code my trigger so that, should an error happen, SQL Server will not abort the INSERT action? Additionally, how can I perform proper error handling so that I can actually know the trigger has failed? Sending an email with the error data would be ok for me (the trigger's main purpose is actually sending emails), but how do I detect an error condition in a trigger and react to it? Edit: Thanks for the tips about optimizing performance by using something else than a trigger, but this code is not "complex" in the sense that it's long-running or performance intensive; it simply builds and sends a mail message, but in order to do so, it must retrieve data from various linked tables, and since I am reverse-engineering this application, I don't have the database schema available and am still trying to find my way around it; this is why conversion errors or unexpected/null values can still creep up, crashing the trigger execution. Also, as stated above, I absolutely can't perform debugging on the application itself, nor modify it to do what I need in the application layer; the only
log in tour help Tour Start 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 http://dba.stackexchange.com/questions/8693/why-try-catch-does-not-suppress-exception-in-trigger this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Database Administrators Questions Tags Users Badges Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Join them; it only takes sql server a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Why TRY CATCH does not suppress exception in trigger up vote 3 down vote favorite I have a trigger on a table (source) that data should be copied to the other one (target) in other database. I sql server trigger am trying to implement custom synchronization process for data: I want that target database (table) will be up to date to source database (table). I have 3 hundred tables to synchronize. Some of then have different physical data structure. I cannot use standard approaches of Sql Server (replication, DTS...) because of different data schema and other restrictions (time to implement, environment issues...). My goal is: this trigger should NOT impact on INSERT, DELETE, UPDATE of records in a source table. I tried so solution: CREATE TRIGGER dbo.MyTrigger ... AFTER INSERT .... BEGIN TRY --RAISERROR('Test error', 16, 2) END TRY BEGIN CATCH -- nothing END CATCH I have inserted RAISEERROR to simulate error. I hoped, try/catch suppressed that error and record was been inserted (deleted, or updated) successfully. Don't. It does not work. I got error: An error was raised during trigger execution. The batch has been aborted and the user transaction, if any, has been rolled back. Is it possible to realize my solution in this way. How can I catch and hold (suppress) any error in my trigger? What sense to use try/catch in trigger if it does not wo