The Art of SQL Server FILESTREAM - Red Gate Software

Chapter 11: FileTableSELECT file_stream.GetFileNamespacePath() 'Default',file_stream.GetFileNamespacePath(1, 2) 'Non-default'FROM DocumentsWHERE name = 'File.txt'/*DefaultNon-default------------------- --------------------------------------------------\Documents\File.txt \\SQL.domain.us\MS…ER\NorthPole\Documents\File.txt*/Listing 11-27: Using the GetFileNamespacePath() function.GetPathLocatorThis function returns the HIERARCHYID associated with the specified, existing full path.You would use this function if you have a known FileTable path and need to locate theSQL Server data row associated with it. Books Online provides a migration scenario froma file server to FileTable as an example at http://brurl.com/fs15.In addition, several undocumented T-SQL functions have been added. These functionsare used in the constraints related to FileTables, but it appears they cannot be called fromregular T-SQL code.PathNameThe PathName() function has been around since the introduction of FILESTREAMin SQL Server 2008. The function works on the file_stream column of a FileTableand you would use its value if you use transactional access to the FileTable and youwant to use the FILESTREAM Win32 API calls. You cannot use the return value of thePathName() function to open a FileTable file for non-transactional access.425