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sys.dm_filestream_file_io_handles (Transact-SQL)

Displays the file handles that the Namespace Owner (NSO) knows about. Filestream handles that a client got using OpenSqlFilestream are displayed by this view.

Applies to: SQL Server (SQL Server 2008 R2 through current version).

Column

Type

Description

handle_context_address

varbinary(8)

Shows the address of the internal NSO structure associated with the client’s handle. Is nullable.

creation_request_id

int

Shows a field from the REQ_PRE_CREATE I/O request used to create this handle. Is not nullable.

creation_irp_id

int

Shows a field from the REQ_PRE_CREATE I/O request used to create this handle. Is not nullable

handle_id

int

Shows the unique ID of this handle that is assigned by the driver. Is not nullable.

creation_client_thread_id

varbinary(8)

Shows a field from the REQ_PRE_CREATE I/O request used to create this handle. Is nullable.

creation_client_process_id

varbinary(8)

Shows a field from the REQ_PRE_CREATE I/O request used to create this handle. Is nullable.

filestream_transaction_id

varbinary(128)

Shows the ID of the transaction associated with the given handle. This is the value returned by the get_filestream_transaction_context function. Use this field to join to the sys.dm_filestream_file_io_requests view. Is nullable.

access_type

nvarchar(60)

Is not nullable.

logical_path

nvarchar(256)

Shows the logical pathname of the file that this handle opened. This is the same pathname that is returned by the .PathName method of varbinary(max) filestream. Is nullable.

physical_path

nvarchar(256)

Shows the actual NTFS pathname of the file. This is the same pathname returned by the .PhysicalPathName method of the varbinary(max) filestream. It is enabled by trace flag 5556. Is nullable.

Requires VIEW SERVER STATE permission on the server.

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