The Art of SQL Server FILESTREAM - Red Gate Software

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Chapter 7: FILESTREAM Database AdministrationCREATE TABLE [dbo].[Items]([ItemID] UNIQUEIDENTIFIER ROWGUIDCOLNOT NULLUNIQUE ,[ItemNumber] VARCHAR(20) ,[ItemDescription] VARCHAR(50) ,[ItemImage] VARBINARY(MAX) FILESTREAMNULL)GOINSERT INTO Items( ItemID, ItemNumber, ItemDescription, ItemImage )VALUES ( NEWID(), 'MS1001', 'Microsoft Mouse', 0x1 ),( NEWID(), 'MS1002', 'Microsoft Keyboard', 0x2 )Listing 7-11:Creating a FILESTREAM database with a FILESTREAM column and two rows.Navigate to the FILESTREAM data container using Windows Explorer and you will seethe two FILESTREAM data files in the folder associated with the Items table. Go aheadand delete one of those files.Let's fire off a few queries to confirm that the database has indeed been corrupted.Listing 7-12 reads data from the Items table.SELECTitemNumber,ItemDescriptionFROM Items/*itemnumberItemDescription-------------------- -------------------MS1001Microsoft MouseMS1002Microsoft Keyboard*/Listing 7-12:Reading relational data from the corrupted Items table.286
Chapter 7: FILESTREAM Database AdministrationThat worked… but we did not touch the FILESTREAM data in the query. Listing 7-13, onthe other hand, will try to read from the FILESTREAM columns.SELECTitemnumber,itemImageFROM Items/*itemnumberItemImage-------------------- ------------------------------Msg 233, Level 20, State 0, Line 0A transport-level error has occurred when receivingresults from the server. (provider: Shared MemoryProvider, error: 0 - No process is on the otherend of the pipe.)*/Listing 7-13:Attempting to read FILESTREAM data from the corrupted Items table.There is a fatal error with Level 20. In SQL Server 2008 and R2 the connection will beterminated when such an error occurs. However, in SQL Server 2012 this error does notterminate the connection.Note that the error occurs only if you try to access a FILESTREAM value that is having aproblem (in this case, missing from the FILESTREAM data container). Querying a validFILESTREAM value will work correctly, as shown in Listing 7-14.SELECTitemNumber,DATALENGTH(ItemImage)FROM itemsWHERE itemNumber = 'MS1002'/*itemnumber-------------------- --------------------MS1002 4*/Listing 7-14:Reading uncorrupted FILESTREAM data in a corrupted database.287
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DBA HandbooksThe Art ofSQL Server F
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Copyright June 2012ISBN 978-1-90643
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Updating and deleting FILESTREAM da
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Creating the stored procedure to fe
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File Backups and Piecemeal Restores
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Setting Up the Server for FileTable
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Using SSMS to check that FILESTREAM
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Sven AeltermanSven Aelterman is a l
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Finding time for writing such a len
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IntroductionWhen I first started my
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The secondary audience for this boo
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Chapter 1: Storing and ManagingUnst
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Chapter 1: Storing and Managing Uns
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Setting the access levelChapter 1:
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Data usage patternsChapter 1: Stori
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Chapter 2: Getting Started with FIL
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Chapter 3: Accessing FILESTREAMData
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Chapter 3: Accessing FILESTREAM Dat
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Chapter 4: FILESTREAM with EntityFr
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Chapter 4: FILESTREAM with Entity F
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Chapter 5: FILESTREAM with ASP.NETa
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Chapter 5: FILESTREAM with ASP.NET
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Chapter 6: FILESTREAM with SSIS and
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Chapter 9: Investigating FILESTREAM
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Chapter 10: Integrating FILESTREAMw
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Chapter 10: Integrating FILESTREAM
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Chapter 11: FileTableThe addition o
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Chapter 11: FileTableColumn Namestr
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Chapter 11: FileTableColumn Nameis_
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Chapter 11: FileTableUSE NorthPoleG
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Chapter 11: FileTableMore on using
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Chapter 11: FileTableFigure 11-1:Se
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Chapter 11: FileTableperformance wh
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Chapter 11: FileTableany files or f
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Chapter 11: FileTable-- If the 'Nor
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Chapter 11: FileTableBy default, th
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Chapter 11: FileTableIt is possible
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Chapter 11: FileTableFigure 11-4:Ch
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Chapter 11: FileTableFurthermore, i
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Chapter 11: FileTableCreating folde
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Chapter 11: FileTableAdding rows us
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Chapter 11: FileTable-- Find the pa
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Chapter 11: FileTable-- Insert a ne
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Chapter 11: FileTablestring SqlText
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Chapter 11: FileTableAs a best prac
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Chapter 11: FileTableSELECT file_st
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Chapter 11: FileTable• non_transa
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Chapter 11: FileTable• filename_c
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Chapter 11: FileTableListing 11-29
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Chapter 11: FileTableLanguage suppo
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Chapter 11: FileTableInvestigating
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Chapter 12: Planning, Configuration
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Appendix A: Configuring FILESTREAMo
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Appendix A: Configuring FILESTREAM
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