sys-dm-hadr-name-id-map-transact-sql.md

title	description	author	ms.author	ms.date	ms.service	ms.subservice	ms.topic	f1_keywords	helpviewer_keywords	dev_langs
sys.dm_hadr_name_id_map (Transact-SQL)	sys.dm_hadr_name_id_map (Transact-SQL)	rwestMSFT	randolphwest	02/27/2023	sql	system-objects	reference	sys.dm_hadr_name_id_map sys.dm_hadr_name_id_map_TSQL dm_hadr_name_id_map dm_hadr_name_id_map_TSQL	Availability Groups [SQL Server], monitoring sys.dm_hadr_name_id_map dynamic management view	TSQL

sys.dm_hadr_name_id_map (Transact-SQL)

[!INCLUDE SQL Server]

Shows the mapping of Always On availability groups that the current instance of [!INCLUDEssNoVersion] has joined to three unique IDs: an availability group ID, a WSFC resource ID, and a WSFC Group ID. The purpose of this mapping is to handle the scenario in which the WSFC resource/group is renamed.

Column name	Data type	Description
ag_name	nvarchar(256)	Name of the availability group. This is a user-specified name that must be unique within the Windows Server Failover Cluster (WSFC) cluster.
ag_id	uniqueidentifier	Unique identifier (GUID) of the availability group.
ag_resource_id	nvarchar(256)	Unique ID of the availability group as a resource in the WSFC cluster.
ag_group_id	nvarchar(256)	Unique WSFC Group ID of the availability group.

Permissions

Requires VIEW SERVER STATE permission on the server.

Permissions for SQL Server 2022 and later

Requires VIEW SERVER PERFORMANCE STATE permission on the server.

See also

Always On Availability Groups Dynamic Management Views and Functions (Transact-SQL)
Always On Availability Groups Catalog Views (Transact-SQL)
Monitor Availability Groups (Transact-SQL)
Always On Availability Groups (SQL Server)