👀 Views: 0 💬 Answers: 1 📅 Created: 2025-06-16

sql-server error-handling user-defined-functions SQL

I'm dealing with I'm performance testing and I've searched everywhere and can't find a clear answer. I'm working with an scenario in SQL Server 2019 where I'm trying to handle errors using a TRY...CATCH block within a user-defined function (UDF)... When an behavior occurs inside the TRY block, I expect the control to transfer to the CATCH block, but instead, I receive the behavior message: 'Msg 50000, Level 16, State 1: An behavior occurred.' This is unexpected because I thought the TRY...CATCH should catch the behavior and allow me to log it. Here’s the simplified version of my function: ```sql CREATE FUNCTION dbo.MyFunction(@input INT) RETURNS INT AS BEGIN DECLARE @result INT; BEGIN TRY SET @result = 10 / @input; END TRY BEGIN CATCH -- Log behavior DECLARE @ErrorMessage NVARCHAR(4000); SELECT @ErrorMessage = ERROR_MESSAGE(); RAISERROR(@ErrorMessage, 16, 1); RETURN -1; -- Indicate behavior END CATCH; RETURN @result; END; ``` When I pass `0` as the input, I expect the CATCH block to handle this division by zero behavior, but instead, it raises the behavior directly. I've tried wrapping the function call in another TRY...CATCH block, but I still get the same behavior: ```sql BEGIN TRY SELECT dbo.MyFunction(0); END TRY BEGIN CATCH SELECT ERROR_MESSAGE(); END CATCH; ``` This just shows the original behavior message. Is there a limitation with using TRY...CATCH inside UDFs, or is there a better approach to handle errors in SQL Server functions? Any guidance would be greatly appreciated. My development environment is Ubuntu. Is there a better approach? I'm working on a API that needs to handle this. Thanks in advance! This is part of a larger web app I'm building. Thanks in advance! This is for a service running on CentOS. What are your experiences with this?