The Art of SQL Server FILESTREAM - Red Gate Software

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Chapter 9: Investigating FILESTREAM Databasessys.tablesThe system catalog view sys.tables contains a row per user-defined table in the currentdatabase. The column filestream_data_space_id refers to the data space ID of aFILESTREAM filegroup or a partition scheme that consists of FILESTREAM filegroups.sys.internal_tablesThe system catalog view sys.internal_tables contains one row for every internaltable in the current database. According to Books Online, internal tables are automaticallygenerated by SQL Server to support specific features; they are generated when thosefeatures are enabled, and removed when the features are disabled. It looks like this is nottrue for the FILESTREAM-specific internal table, FILESTREAM_TOMBSTONE. It is alsofound in the model database and automatically added to every new database, whether ornot the FILESTREAM feature is enabled.This view has a number of columns that are relevant to the FILESTREAM feature.• internal_type – A TINYINT column that specifies the type of the internal tablebeing referenced by the current row. If the current database has a FILESTREAMtombstone table, it will show up in this view and the internal_type column will beset to 208. (For more information about the tombstone table, refer back to Chapter 7.)• internal_type_desc – The text description of the internal_type column. ForFILESTREAM tombstone tables, the value will be FILESTREAM_TOMBSTONE.• name – The name of the table. FILESTREAM tombstone tables are named asfilestream_tombstone_nnnnn, where nnnnn is a number that points to theobject_id of the table.• filestream_data_space_id – An integer value that is reserved for future use.332
Chapter 9: Investigating FILESTREAM Databasessys.partitionsThis view contains a row for each partition of all the tables and indexes in the givendatabase. One of the columns in this view is filestream_filegroup_id, which pointsto the filegroup ID in the sys.filegroups table.sys.data_spacesThis view returns a row for every filegroup, partition schema, and FILESTREAM filegroup.The query in Listing 9-2 retrieves all the FILESTREAM filegroups in the current database.SELECT*FROM sys.data_spacesWHERE type_desc = 'FILESTREAM_DATA_FILEGROUP'/*name data_space_id type type_desc is_default------------ ------------- ---- ------------------------- ----------NorthPole_fs 2 FD FILESTREAM_DATA_FILEGROUP 1*/Listing 9-2:Retrieving all the FILESTREAM filegroups in the current database.The following columns of this view are related to the FILESTREAM feature.• name – The name of the filegroup, partition schema, or FILESTREAM filegroup.• data_space_id – The unique data space ID.• type – The type of data space. For FILESTREAM filegroups, this will be set to FD.• type_desc – A description of the data space. For FILESTREAM filegroups, this willbe FILESTREAM_DATA_FILEGROUP.• is_default – If the filegroup is marked as the default filegroup, this will be set to 1.333
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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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Creating a data sourceChapter 6: FI
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Chapter 7: FILESTREAM Database Admi
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Chapter 10: Integrating FILESTREAM
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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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