int

When called in a CATCH block, returns the error number of the error message that caused the CATCH block to be run.

Returns NULL if called outside the scope of a CATCH block.

This function may be called anywhere within the scope of a CATCH block.

ERROR_NUMBER returns the error number regardless of how many times it is run, or where it is run within the scope of the CATCH block. This is in contrast to @@ERROR, which only returns the error number in the statement immediately after the one that causes an error, or the first statement of a CATCH block.

In nested CATCH blocks, ERROR_NUMBER returns the error number specific to the scope of the CATCH block in which it is referenced. For example, the CATCH block of an outer TRY...CATCH construct could have a nested TRY...CATCH construct. Within the nested CATCH block, ERROR_NUMBER returns the number from the error that invoked the nested CATCH block. If ERROR_NUMBER is run in the outer CATCH block, it returns the number from the error that invoked that CATCH block.

A. Using ERROR_NUMBER in a CATCH block

USE AdventureWorks;
GO

BEGIN TRY
    -- Generate a divide-by-zero error.
    SELECT 1/0;
END TRY
BEGIN CATCH
    SELECT ERROR_NUMBER() AS ErrorNumber;
END CATCH;
GO

B. Using ERROR_NUMBER in a CATCH block with other error-handling tools

USE AdventureWorks;
GO

BEGIN TRY
    -- Generate a divide-by-zero error.
    SELECT 1/0;
END TRY
BEGIN CATCH
    SELECT
        ERROR_NUMBER() AS ErrorNumber,
        ERROR_SEVERITY() AS ErrorSeverity,
        ERROR_STATE() AS ErrorState,
        ERROR_PROCEDURE() AS ErrorProcedure,
        ERROR_LINE() AS ErrorLine,
        ERROR_MESSAGE() AS ErrorMessage;
END CATCH;
GO

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