It is important to keep in mind that the directory hierarchy created under the instance-level FILESTREAM share is a virtual directory hierarchy. Under this directory hierarchy, the FILESTREAM data for the FileTable is stored as files, and as subdirectories which can also contain files and subdirectories. This directory hierarchy forms the root of the FileTable's file namespace. The FILETABLE_DIRECTORY specified at the FileTable level. The DIRECTORY_NAME specified at the database level. The share enabled for FILESTREAM file I/O access at the SQL Server instance level. The full path to a file or directory stored in a FileTable begins with the following elements: The full path to an item stored in a FileTable However you can continue to access these files by using Transact-SQL. Therefore it is possible to create files in the file hierarchy of a FileTable by using Transact-SQL that you cannot view or open with Windows Explorer or many other Windows applications, because the full path name exceeds 260 characters. The NTFS file system supports path names that are much longer than the 260-character limit of the Windows shell and most Windows APIs. SELECT = + file_stream.GetFileNamespacePath() By default, the GetFileNamespacePath function returns the relative path of the file under the root path for the database. Instead, get the complete path for a file at run time by using the FileTableRootPath (Transact-SQL) and GetFileNamespacePath (Transact-SQL)) functions together, as shown in the following example. To keep code and applications independent of the current computer and database, avoid writing code that relies on absolute file paths. How to: Use Relative Paths for Portable Code Get the path locator ID value for the specified file or directory in a FileTable, by providing the path. Get an absolute or relative UNC path for a file or directory in a FileTable. Get the root-level UNC path for a specific FileTable or for the current database. You can use the following 3 functions to work with FileTable directories in Transact-SQL: To get this result How To: Work with Directories and Paths in FileTables Describes the directory structure in which the files are stored in FileTables.
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