The Art of SQL Server FILESTREAM - Red Gate Software

Chapter 11: FileTableoptional arguments, table_name and handle_id. If these arguments are notprovided, or NULL is passed, all non-transactional file handles are closed. If table_nameonly is provided, all non-transactional file handles for that table are closed. Iftable_name is provided, then a handle_id can also be specified to close a specificfile. The handle IDs of open files can be obtained from the dynamic management viewsys.dm_filestream_non_transacted_handles, discussed previously.Advanced FileTable UsesIn this section, we will demonstrate the use of FileTable with two other SQL Serverfeatures that are particularly well suited to be used in conjunction with it: full-text searchand semantic search. Full-text search indexes the contents of columns of supported types(including VARBINARY(MAX) and FILESTREAM) and allows for fast searching of thosecontents. It is somewhat like the Windows Search feature. Semantic search is new in SQLServer 2012 and builds upon the full-text indexing feature.Full-text searchFileTable is ideally suited as a document storage repository, so adding a full-text index tothe table may help users locate documents. The schema of FileTables meets the requirementsfor full-text indexing.• The file contents are in a VARBINARY(MAX) FILESTREAM column.• The file extension is stored in a computed column, file_type. This column is used tomap to the correct IFilter.• There is a unique index on the FileTable that meets the requirements for full-textindexing: the primary key of the FileTable.430