Check whether file exists - in SQL Server 2005

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Hi,
I was trying to write a SQL user defined function to check whether a file path passed to it exists or not.

SQL

CREATE FUNCTION [dbo].[IsExists](@FilePath nvarchar(MAX))
RETURNS int
AS
BEGIN
    DECLARE @File_Exists int;
    EXEC Master.dbo.xp_fileexist @FilePath, @File_Exists OUT;
    RETURN ISNULL(@File_Exists, 0);
END

This function is always returning Zero, regardless of whether the file exists or not. Could anyone help me to find where I went wrong! :(

Now, while checking this, I wrote the below given script (code snippet)

SQL

DECLARE @FilePath nvarchar(MAX);
SET @FilePath='C:\temp\ServiceLog.txt';

CREATE TABLE #FileExists (isExists int, isDirectory int, isParentDirExists int);

INSERT INTO #FileExists (isExists, isDirectory, isParentDirExists)
    EXEC Master.dbo.xp_fileexist @FilePath;

DROP TABLE #FileExists;

and it is throwing error!
Msg 0, Level 11, State 0, Line 0
A severe error occurred on the current command. The results, if any, should be discarded. Any clue... :(

Regards
Sangeeth

Posted 27-Jun-13 2:53am

Sangeeth Mohan

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Radhadeep12 · Answer 1 · 2013-06-27T04:02:00

It works fine at my place

SQL

CREATE FUNCTION [dbo].[IsExists](@FilePath nvarchar(255))
RETURNS int
AS
BEGIN
    DECLARE @File_Exists INT;
    EXEC Master.dbo.xp_fileexist @FilePath, @File_Exists OUT;
    RETURN @File_Exists
END
GO

DECLARE @FilePath VARCHAR(255)= 'F:\data.txt'
SELECT [dbo].[IsExists] (@FilePath) AS FileExists
GO

FileExists
1

Running without using function

SQL

DECLARE @FilePath VARCHAR(255)= 'F:\data.txt'

CREATE TABLE #FileExists (isExists int, isDirectory int, isParentDirExists int);
INSERT INTO #FileExists (isExists, isDirectory, isParentDirExists)
EXEC Master.dbo.xp_fileexist @FilePath;

SELECT * FROM #FileExists

DROP TABLE #FileExists;

isExists	isDirectory	isParentDirExists
1	        0	        1

I Just have changed Nvarchar(Max) to Nvarchar(255)