What you're trying to do would leave the database in a (transactionally) inconsistent state, hence it isn't possible.
The Partial Database Availability whitepaper is a useful reference guide and includes an example of how to check whether a particular table or file is online. If your data access were through stored procedures, you could relatively easily incorporate that check.
One alternative (but somewhat hacky) approach that might be worth a look in your scenario would be to hide the table and replace it with a view.
-- NB: SQLCMD script
:ON ERROR EXIT
:setvar DatabaseName "TestRename"
:setvar FilePath "D:\MSSQL\I3\Data\"
SET STATISTICS TIME OFF;
SET STATISTICS IO OFF;
SET NOCOUNT ON;
GO
USE master;
GO
IF EXISTS (SELECT name FROM sys.databases WHERE name = N'$(DatabaseName)')
DROP DATABASE $(DatabaseName)
GO
CREATE DATABASE $(DatabaseName)
ON PRIMARY
(
NAME = N' $(DatabaseName)'
, FILENAME = N'$(FilePath)$(DatabaseName).mdf'
, SIZE = 5MB
, MAXSIZE = UNLIMITED
, FILEGROWTH = 1MB
)
, FILEGROUP [FG1] DEFAULT
(
NAME = N' $(DatabaseName)_FG1_File1'
, FILENAME = N'$(FilePath)$(DatabaseName)_FG1_File1.ndf'
, SIZE = 1MB
, MAXSIZE = UNLIMITED
, FILEGROWTH = 1MB
)
, FILEGROUP [FG2] CONTAINS FILESTREAM
(
NAME = N'$(DatabaseName)_FG2'
, FILENAME = N'$(FilePath)Filestream'
)
LOG ON
(
NAME = N'$(DatabaseName)_log'
, FILENAME = N'$(FilePath)$(DatabaseName)_log.ldf'
, SIZE = 1MB
, MAXSIZE = UNLIMITED
, FILEGROWTH = 1MB
)
GO
USE $(DatabaseName);
GO
CREATE TABLE [dbo].[BinaryContent](
[BinaryContentID] [int] IDENTITY(1,1) NOT NULL
, [FileName] [varchar](50) NOT NULL
, [BinaryContentRowGUID] [uniqueidentifier] ROWGUIDCOL UNIQUE DEFAULT (NEWSEQUENTIALID()) NOT NULL
, [FileContentBinary] VARBINARY(max) FILESTREAM NULL
) ON [PRIMARY] FILESTREAM_ON [FG2]
GO
-- Insert test rows
INSERT
dbo.BinaryContent
(
[FileName]
, [FileContentBinary]
)
VALUES
(
CAST(NEWID() AS VARCHAR(36))
, CAST(REPLICATE(NEWID(), 100) AS VARBINARY)
);
GO 100
USE master;
GO
-- Take FILESTREAM filegroup offline
ALTER DATABASE $(DatabaseName)
MODIFY FILE (NAME = '$(DatabaseName)_FG2', OFFLINE)
GO
USE $(DatabaseName);
GO
-- Rename table to make way for view
EXEC sp_rename 'dbo.BinaryContent', 'BinaryContentTable', 'OBJECT';
GO
-- Create view to return content from table but with NULL FileContentBinary
CREATE VIEW dbo.BinaryContent
AS
SELECT
[BinaryContentID]
, [FileName]
, [BinaryContentRowGUID]
, [FileContentBinary] = NULL
FROM
[dbo].[BinaryContentTable];
GO
-- Check results as expected
SELECT TOP 10
*
FROM
dbo.BinaryContent;
GO
Best Answer
In short you can't. You would have to restore the entire database to another machine, then copy the needed file from the restored machine and put it into place on the production server. Single object restores and single row restores (which is what restoring a single file effectively is) have never been supported via the native tools.