ERROR_LINE (Transact-SQL)

مقالة
05/16/2013

Returns the line number at which an error occurred that caused the CATCH block of a TRY…CATCH construct to be run.

Topic link icon Transact-SQL Syntax Conventions

Syntax

ERROR_LINE ( )

Return Type

int

Return Value

When called in a CATCH block:

Returns the line number at which the error occurred.
Returns the line number in a routine if the error occurred within a stored procedure or trigger.

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

Remarks

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

ERROR_LINE returns the line number at which the error occurred regardless of the number of times it is called or where it is called within the scope of the CATCH block. This contrasts with functions, such as @@ERROR, which return an error number in the statement immediately following the one that causes an error or in the first statement of a CATCH block.

In nested CATCH blocks, ERROR_LINE returns the error line number specific to the scope of the CATCH block in which it is referenced. For example, the CATCH block of a TRY…CATCH construct could contain a nested TRY…CATCH construct. Within the nested CATCH block, ERROR_LINE returns the line number for the error that invoked the nested CATCH block. If ERROR_LINE is run in the outer CATCH block, it returns the line number for the error that invoked that CATCH block.

Examples

A. Using ERROR_LINE in a CATCH block

The following code example shows a SELECT statement that generates a divide-by-zero error. The line number at which the error occurred is returned.

USE AdventureWorks2012;
GO

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

B. Using ERROR_LINE in a CATCH block with a stored procedure

The following code example shows a stored procedure that will generate a divide-by-zero error. ERROR_LINE returns the line number in the stored procedure in which the error occurred.

-- Verify that the stored procedure does not already exist.
IF OBJECT_ID ( 'usp_ExampleProc', 'P' ) IS NOT NULL 
    DROP PROCEDURE usp_ExampleProc;
GO

-- Create a stored procedure that 
-- generates a divide-by-zero error.
CREATE PROCEDURE usp_ExampleProc
AS
    SELECT 1/0;
GO

BEGIN TRY
    -- Execute the stored procedure inside the TRY block.
    EXECUTE usp_ExampleProc;
END TRY
BEGIN CATCH
    SELECT ERROR_LINE() AS ErrorLine;
END CATCH;
GO

C. Using ERROR_LINE in a CATCH block with other error-handling tools

The following code example shows a SELECT statement that generates a divide-by-zero error. Along with the line number at which the error occurred, information that relates to the error is returned.

USE AdventureWorks2012;
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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