The Database User that runs these routines that I show will need ‘special powers’, powers that can’t possibly be given to general users for reasons of security. For the majority of operations, it is the obvious choice to use SSIS/DTS, but not invariably. In the hard reality of life in an IT department, it is sometimes the only practical option. This is because SQL Server is usually the worst place to do such an operation. The operation of getting data to or from files is so easy but not always so in SQL Server. These are simple operations, but it is some of the simplest operations in a database that can prove to be the most taxing: By way of contrast when you are working in DOS, the DIR or ls commands are one of the first commands that one learns. Write the String-based results of a SQL Expression into a file.Write data from a TSQL variable into a file.Read data into a table, each line in a table row.Read data from file into a TSQL variable.Access the SHELL.APPLICATION to do file operations.Get a List of Files in a directory/folder, with, if you with, the subfolders and attributes such as file size, revision date, or short-form.In this belated second part (I’ll assume you have SQL Server 2005 or 2008 most of the time) We’re going to show you the TSQL you can use to Security Descriptor, Owner SID, and Group SID) info (this does slow it down a little, hence it’s optional), uses RegEx for directory and filename filters, supports long paths, etc.This article revisits the theme of an article I wrote for Simple-Talk two years ago called Reading and Writing Files in SQL Server using T-SQL, which to my amazement, has proved to be the most popular article I’ve ever written. I should mention that the File_GetDirectoryListing TVF is not in the Free version, but it is fast, it can get ACL/ownership (i.e. In fact, I did this many years ago in my SQL# library. Prior to SQL Server 2017 (and even since then) you can use SQLCLR to create effectively the same function. You can also pass in a regular DOS wildcard ( * = match zero or more characters ? = match exactly 1 character) as the second parameter:įROM sys.dm_os_enumerate_filesystem(N'C:\temp\', N'*.txt') įROM sys.dm_os_enumerate_filesystem(N'C:\temp\', N'Test?x.txt') This is a function so you don’t need to dump the results into a temp table or table variable. Yes, xp_dirtree is limited, but starting in SQL Server 2017, you can use: sys.dm_os_enumerate_filesystem(). For each folder in the #DirectoryTree table, we get a list of files and subfolders and insert it to the #DirectoryTree table. This code will process one folder level at a time since we’re specifying 1 for the depth parameter. SELECT fullpath + '\' + subdirectory AS 'CompleteFileList' IF = this section if the we are still in the same folder.ĮXEC _dirtree #DirectoryTreeĭELETE FROM #DirectoryTree WHERE id = this section if we need to jump down into another subfolder.ĭELETE FROM #DirectoryTree WHERE id = the results. WHILE EXISTS (SELECT id FROM #DirectoryTree WHERE isfile = 0) INSERT #DirectoryTree (subdirectory,depth,isfile)ĮXEC _dirtree #DirectoryTree SET fullpath = through the table as long as there are still folders to process. Populate the table using the initial base path. Create a clustered index to keep everything in order.ĪDD CONSTRAINT PK_DirectoryTree PRIMARY KEY CLUSTERED (id) IF OBJECT_ID('tempdb.#DirectoryTree')IS NOT NULL Create a temp table to hold the results.
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