Determine Which Queries Are Holding Locks – SQL Server

Following is a query to determine which queries are holding locks?

SELECT DTL.resource_type,
CASE
WHEN DTL.resource_type IN (‘DATABASE’, ‘FILE’, ‘METADATA’) THEN DTL.resource_type
WHEN DTL.resource_type = ‘OBJECT’ THEN OBJECT_NAME(DTL.resource_associated_entity_id)
WHEN DTL.resource_type IN (‘KEY’, ‘PAGE’, ‘RID’) THEN
(
SELECT OBJECT_NAME([object_id])
FROM sys.partitions
WHERE sys.partitions.hobt_id =
DTL.resource_associated_entity_id
)
ELSE ‘Unidentified’
END AS requested_object_name, DTL.request_mode, DTL.request_status,
DOWT.wait_duration_ms, DOWT.wait_type, DOWT.session_id AS [blocked_session_id],
sp_blocked.[loginame] AS [blocked_user], DEST_blocked.[text] AS [blocked_command],
DOWT.blocking_session_id, sp_blocking.[loginame] AS [blocking_user],
DEST_blocking.[text] AS [blocking_command], DOWT.resource_description
FROM sys.dm_tran_locks DTL
INNER JOIN sys.dm_os_waiting_tasks DOWT
ON DTL.lock_owner_address = DOWT.resource_address
INNER JOIN sys.sysprocesses sp_blocked
ON DOWT.[session_id] = sp_blocked.[spid]
INNER JOIN sys.sysprocesses sp_blocking
ON DOWT.[blocking_session_id] = sp_blocking.[spid]
CROSS APPLY sys.[dm_exec_sql_text](sp_blocked.[sql_handle]) AS DEST_blocked
CROSS APPLY sys.[dm_exec_sql_text](sp_blocking.[sql_handle]) AS DEST_blocking
WHERE DTL.[resource_database_id] = DB_ID()

By running above given query, you will have detail information about locking.

Happy programing!!!