(SQL Server) Create Symbolic Link

Demonstrates how to create a symbolic (soft) link.

Note: This example requires Chilkat v9.5.0.77 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- Chilkat supports symbolic links on both Windows and non-Windows operating systems.
    -- Note: On Windows, symbolic links and Windows shortcuts are two different things.
    -- On the Windows operating system, a process requires a special privilege to create
    -- a symbolic link (unless running as administrator).  

    DECLARE @fac int
    -- Use "Chilkat_9_5_0.FileAccess" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.FileAccess', @fac OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- Here we create a symbolic link to point to qa_data/hamlet.xml
    -- 
    DECLARE @target nvarchar(4000)
    SELECT @target = 'qa_data/hamlet.xml'
    DECLARE @symlink nvarchar(4000)
    SELECT @symlink = 'qa_output/symlink_hamlet.xml'
    DECLARE @success int
    EXEC sp_OAMethod @fac, 'SymlinkCreate', @success OUT, @target, @symlink
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @fac, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        RETURN
      END

    -- Here we create a directory symbolic link.  The target is a directory (not a regular file)
    SELECT @target = 'qa_data/xml/'
    SELECT @symlink = 'qa_output/xml_dir'
    EXEC sp_OAMethod @fac, 'SymlinkCreate', @success OUT, @target, @symlink
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @fac, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @fac
        RETURN
      END


    PRINT 'Success.'

    EXEC @hr = sp_OADestroy @fac


END
GO