The Art of SQL Server FILESTREAM - Red Gate Software

Chapter 9: Investigating FILESTREAM DatabasesINNER JOIN sys.data_spaces dON d.data_space_id = t.filestream_data_space_idWHERE p.filestream_filegroup_id > 0/*TableName FileGroup FolderName--------- ------------- ------------------------------------Items1 NorthPole_fs1 041C0478-8EB6-4C65-B0AD-12E29DF69D09Items2 NorthPole_fs2 AEA2F2A4-4CA5-4790-AB16-1F78379D69C8*/Listing 9-10:Retrieving the FILESTREAM folders associated with each table in the current database.Note that, without the WHERE clause, two rows are returned for each table withFILESTREAM columns. The second row contains NULL as the filestream_guid value.There are two rows in sys.system_internals_partitions for a single table withFILESTREAM columns. The difference seems to be in the filestream_filegroup_idfield that is set to "0" for the row that has the NULL in the filestream_guid field.If the FILESTREAM table is partitioned, SQL Server will create a root folder per partitionin the table. If you have partitioned FILESTREAM tables, you might need a slightlymodified version of the above query to determine the FILESTREAM folder names of eachpartition, as shown in Listing 9-11. It is interesting to note that SQL Server does not listthe NULL row we saw earlier when the table is partitioned; therefore, this query does nothave the same WHERE clause.SELECTt.Name AS TableName,sip.partition_number AS PartitionNumber,sip.filestream_guid AS FilestreamFolderFROM sys.system_internals_partitions sipINNER JOIN sys.partitions p ON p.partition_id = sip.partition_idAND sip.filestream_guid IS NOT NULLINNER JOIN sys.tables tON t.object_id = p.object_id342