DBA Utility Belt: Open Locks

I’m starting a new series, entitle the DBA Utility Belt.  I’m going to use it to document some of my more frequently-used scripts in a place where I can search for them later.  Most of these are scripts that I found online over the years which satisfied my needs.  Unfortunately, I don’t have information on who wrote these scripts originally, so I won’t be able to attribute them to their original developers.

My first entry is a listing of open locks.  This script is particularly useful if somebody has a BEGIN TRAN statement without a ROLLBACK or COMMIT, leading to query blocking due to locked pages.

SELECT  
	L.request_session_id AS SPID, 
	DB_NAME(L.resource_database_id) AS DatabaseName,
	O.Name AS LockedObjectName, 
	P.object_id AS LockedObjectId, 
	L.resource_type AS LockedResource, 
	L.request_mode AS LockType,
	ST.text AS SqlStatementText,        
	ES.login_name AS LoginName,
	ES.host_name AS HostName,
	TST.is_user_transaction as IsUserTransaction,
	AT.name as TransactionName,
	CN.auth_scheme as AuthenticationMethod
FROM
	sys.dm_tran_locks L
	JOIN sys.partitions P ON P.hobt_id = L.resource_associated_entity_id
	JOIN sys.objects O ON O.object_id = P.object_id
	JOIN sys.dm_exec_sessions ES ON ES.session_id = L.request_session_id
	JOIN sys.dm_tran_session_transactions TST ON ES.session_id = TST.session_id
	JOIN sys.dm_tran_active_transactions AT ON TST.transaction_id = AT.transaction_id
	JOIN sys.dm_exec_connections CN ON CN.session_id = ES.session_id
	CROSS APPLY sys.dm_exec_sql_text(CN.most_recent_sql_handle) AS ST
WHERE
	resource_database_id = db_id()
ORDER BY 
	L.request_session_id;

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