The Art of SQL Server FILESTREAM - Red Gate Software

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Chapter 10: Integrating FILESTREAM with other SQL Server Featuresname is between parentheses). Check the value in the Status column. If it is blank, thenthe service is stopped. Right-click the service name and select Start. If you want theservice to start automatically when Windows starts, modify the Properties of the serviceand change the Startup type to Automatic.Once CDC is enabled, we can make some data modifications and see the results in thecaptured tables (Listing 10-21).-- Update the content of the ItemImage columnUPDATE ItemsSET ItemImage = CAST(1 AS VARBINARY(MAX))-- Delete the recordDELETE FROM ItemsListing 10-21: Updating the FILESTREAM value to generate some CDC log entries.Now, let's go to the CDC tables and see whether the data has been captured(Listing 10-22).DECLARE@LSNFrom BINARY(10) = sys.fn_cdc_map_time_to_lsn('smallest greater than or equal',GETDATE() - 1) ,@LSNTo BINARY(10) = sys.fn_cdc_map_time_to_lsn('largest less than or equal',GETDATE())SELECT CASE [__$operation]WHEN 1 THEN 'Delete'WHEN 2 THEN 'Insert'WHEN 3 THEN 'Update (Old Values)'WHEN 4 THEN 'Update (New Values)'END AS Operation ,ItemNumber ,ItemDescription ,DATALENGTH(ItemImage) AS ImageSizeFROM cdc.fn_cdc_get_all_changes_dbo_Items(@LSNFrom, @LSNTo,'all update old') ;380
Chapter 10: Integrating FILESTREAM with other SQL Server Features/*OperationItemNumber ItemDescription ImageSize------------------- ---------- --------------- ---------Update (Old Values) MS1001 Microsoft Mouse 499988Update (New Values) MS1001 Microsoft Mouse 4Delete MS1001 Microsoft Mouse 4*/Listing 10-22: Querying the CDC logs for data modification history.Note that the maximum replication text size configuration setting also affects CDC. Weexamined this setting in detail when we discussed replication, earlier in this chapter.When CDC is enabled on a table, if you try to insert or update a data value larger than thesize specified, the INSERT or UPDATE operation will fail.To summarize, it is possible to enable CDC on FILESTREAM columns, but CDC willcapture the column as VARBINARY(MAX), not as FILESTREAM. Enabling CDC onFILESTREAM columns is not recommended or supported. Before moving on, let's disableCDC on the NorthPole database. Listing 10-23 shows how. It's not necessary to disableCDC on individual tables first.USE NorthPoleGO-- Disable CDC on the NorthPole databaseEXEC sys.sp_cdc_disable_dbListing 10-23: Disabling CDC on a database.381
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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 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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Creating a data sourceChapter 6: FI
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Chapter 7: FILESTREAM Database Admi
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Fixing corrupted dataChapter 7: FIL
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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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