删除Management Data Warehouse (MDW) job失败
最近在清理一些不用的Job,发现几个跟MDW有关的。虽然Job已经被Disable, 但是没有被删除。尝试删除出现下面的错误：
The DELETE statement conflicted with the REFERENCE constraint "FK_syscollector_collection_sets_collection_sysjobs". The conflict occurred in database "msdb", table "dbo.syscollector_collection_sets_internal", column 'collection_job_id'.The statement has been terminated. (.Net SqlClient Data Provider)
查了一些文档发现这个问题在2008/2008 R2中都存在，只能Disable但是无法删除。找到了一篇文章Remove associated data collector jobs提供了代码去删除MDW的相关job和对象.虽然文章提到只能在测试环境中运行这个脚本，但是这个脚本不会对其他应用产生影响。
USE MSDB
GO
-- Disable constraints
ALTERTABLE dbo.syscollector_collection_sets_internal NOCHECKCONSTRAINT FK_syscollector_collection_sets_collection_sysjobs
ALTERTABLE dbo.syscollector_collection_sets_internal NOCHECKCONSTRAINT FK_syscollector_collection_sets_upload_sysjobs
-- Delete data collector jobs
DECLARE @job_id uniqueidentifier
DECLARE datacollector_jobs_cursor CURSORLOCAL
FOR
SELECT collection_job_id AS job_id FROMsyscollector_collection_sets
WHERE collection_job_id ISNOTNULL
UNION
SELECT upload_job_id AS job_id FROMsyscollector_collection_sets
WHERE upload_job_id ISNOTNULL
OPEN datacollector_jobs_cursor
FETCHNEXTFROM datacollector_jobs_cursor INTO @job_id
WHILE (@@fetch_status= 0)
BEGIN
IFEXISTS(SELECTCOUNT(job_id)FROM sysjobs WHERE job_id = @job_id )
BEGIN
DECLARE @job_name sysname
SELECT @job_name = name from sysjobs WHERE job_id = @job_id
PRINT'Removing job '+ @job_name
EXEC dbo.sp_delete_job@job_id=@job_id, @delete_unused_schedule=0
END
FETCHNEXTFROM datacollector_jobs_cursor INTO @job_id
END
CLOSE datacollector_jobs_cursor
DEALLOCATE datacollector_jobs_cursor
-- Enable Constraints back
ALTERTABLE dbo.syscollector_collection_sets_internal CHECKCONSTRAINT FK_syscollector_collection_sets_collection_sysjobs
ALTERTABLE dbo.syscollector_collection_sets_internal CHECKCONSTRAINT FK_syscollector_collection_sets_upload_sysjobs
-- Disable trigger on syscollector_collection_sets_internal
EXEC('DISABLE TRIGGER syscollector_collection_set_is_running_update_trigger ON syscollector_collection_sets_internal')
-- Set collection sets as not running state
UPDATE syscollector_collection_sets_internal
SET is_running = 0
-- Update collect and upload jobs as null
UPDATE syscollector_collection_sets_internal
SET collection_job_id =NULL, upload_job_id =NULL
-- Enable back trigger on syscollector_collection_sets_internal
EXEC('ENABLE TRIGGER syscollector_collection_set_is_running_update_trigger ON syscollector_collection_sets_internal')
-- re-set collector config store
UPDATE syscollector_config_store_internal
SET parameter_value = 0
WHERE parameter_name IN('CollectorEnabled')
UPDATE syscollector_config_store_internal
SET parameter_value =NULL
WHERE parameter_name IN('MDWDatabase','MDWInstance')
-- Delete collection set logs
DELETEFROM syscollector_execution_log_internal
GO
运行之后会看到下面的结果：
Removing job collection_set_3_collection
Removing job collection_set_2_upload
Removing job collection_set_1_noncached_collect_and_upload
Removing job collection_set_2_collection
Removing job collection_set_3_upload
可以看到跟ＭＤＷ有关的job已经被移除。另外提一下在2012中微软提供了一个新的系统存储过程sp_syscollector_delete_collection_set，可以删除自定义的MDW job和对象，其实看下这个存储过程的代码跟上面的差不多。
CREATEPROC [dbo].[sp_syscollector_cleanup_collector]
@collection_set_id INT=NULL
AS
BEGIN
IF (@collection_set_id ISNOTNULL)
BEGIN
DECLARE @retVal int
EXEC @retVal = dbo.sp_syscollector_verify_collection_set@collection_set_id OUTPUT
IF (@retVal <> 0)
BEGIN
RETURN (1)
END
END
DECLARE @TranCounter INT
SET @TranCounter =@@TRANCOUNT
IF (@TranCounter > 0)
SAVETRANSACTION tran_cleanup_collection_set
ELSE
BEGINTRANSACTION
BEGINTRY
-- changing isolation level to repeatable to avoid any conflicts that may happen
-- while running this stored procedure and sp_syscollector_start_collection_set concurrently
SETTRANSACTIONISOLATIONLEVELREPEATABLEREAD
-- Security check (role membership)
IF (NOT(ISNULL(IS_MEMBER(N'dc_admin'), 0)= 1)ANDNOT(ISNULL(IS_MEMBER(N'db_owner'), 0)= 1))
BEGIN
REVERT
RAISERROR(14677,-1,-1,'dc_admin')
RETURN (1)
END
-- Disable constraints
-- this is done to make sure that constraint logic does not interfere with cleanup process
ALTERTABLE dbo.syscollector_collection_sets_internal NOCHECKCONSTRAINT FK_syscollector_collection_sets_collection_sysjobs
ALTERTABLE dbo.syscollector_collection_sets_internal NOCHECKCONSTRAINT FK_syscollector_collection_sets_upload_sysjobs
-- Delete data collector jobs
DECLARE @job_id uniqueidentifier
DECLARE datacollector_jobs_cursor CURSORLOCAL
FOR
SELECT collection_job_id AS job_id FROMsyscollector_collection_sets
WHERE collection_job_id ISNOTNULL
AND( collection_set_id = @collection_set_id OR @collection_set_id ISNULL)
UNION
SELECT upload_job_id AS job_id FROMsyscollector_collection_sets
WHERE upload_job_id ISNOTNULL
AND( collection_set_id = @collection_set_id OR @collection_set_id ISNULL)
OPEN datacollector_jobs_cursor
FETCHNEXTFROM datacollector_jobs_cursor INTO @job_id
WHILE (@@fetch_status= 0)
BEGIN
IFEXISTS(SELECTCOUNT(job_id)FROM sysjobs WHERE job_id = @job_id )
BEGIN
DECLARE @job_name sysname
SELECT @job_name = name from sysjobs WHERE job_id = @job_id
PRINT'Removing job '+ @job_name
EXEC dbo.sp_delete_job@job_id=@job_id, @delete_unused_schedule=0
END
FETCHNEXTFROM datacollector_jobs_cursor INTO @job_id
END
CLOSE datacollector_jobs_cursor
DEALLOCATE datacollector_jobs_cursor
-- Enable Constraints back
ALTERTABLE dbo.syscollector_collection_sets_internal CHECKCONSTRAINT FK_syscollector_collection_sets_collection_sysjobs
ALTERTABLE dbo.syscollector_collection_sets_internal CHECKCONSTRAINT FK_syscollector_collection_sets_upload_sysjobs
-- Disable trigger on syscollector_collection_sets_internal
-- this is done to make sure that trigger logic does not interfere with cleanup process
EXEC('DISABLE TRIGGER syscollector_collection_set_is_running_update_trigger ON syscollector_collection_sets_internal')
-- Set collection sets as not running state and update collect and upload jobs as null
UPDATE syscollector_collection_sets_internal
SET is_running = 0,
collection_job_id =NULL,
upload_job_id =NULL
WHERE (collection_set_id = @collection_set_id OR @collection_set_id ISNULL)
-- Enable back trigger on syscollector_collection_sets_internal
EXEC('ENABLE TRIGGER syscollector_collection_set_is_running_update_trigger ON syscollector_collection_sets_internal')
-- re-set collector config store if there is no enabled collector
DECLARE @counter INT
SELECT @counter=COUNT(is_running)
FROM syscollector_collection_sets_internal
WHERE is_running = 1
IF (@counter = 0)
BEGIN
UPDATE syscollector_config_store_internal
SET parameter_value = 0
WHERE parameter_name IN('CollectorEnabled');
UPDATE syscollector_config_store_internal
SET parameter_value =NULL
WHERE parameter_name IN('MDWDatabase','MDWInstance')
END
-- Delete collection set logs
DELETEFROM syscollector_execution_log_internal
WHERE (collection_set_id = @collection_set_id OR @collection_set_id ISNULL)
IF (@TranCounter = 0)
BEGIN
COMMITTRANSACTION
END
RETURN(0)
ENDTRY
BEGINCATCH
IF (@TranCounter = 0 ORXACT_STATE()=-1)
ROLLBACKTRANSACTION
ELSEIF (XACT_STATE()= 1)
ROLLBACKTRANSACTION tran_cleanup_collection_set
DECLARE @ErrorMessageNVARCHAR(4000);
DECLARE @ErrorSeverityINT;
DECLARE @ErrorStateINT;
DECLARE @ErrorNumberINT;
DECLARE @ErrorLineINT;
DECLARE @ErrorProcedure NVARCHAR(200);
SELECT @ErrorLine =ERROR_LINE(),
@ErrorSeverity =ERROR_SEVERITY(),
@ErrorState =ERROR_STATE(),
@ErrorNumber =ERROR_NUMBER(),
@ErrorMessage =ERROR_MESSAGE(),
@ErrorProcedure =ISNULL(ERROR_PROCEDURE(),'-');
RAISERROR (14684, @ErrorSeverity,-1 , @ErrorNumber, @ErrorSeverity, @ErrorState, @ErrorProcedure, @ErrorLine, @ErrorMessage);
RETURN (1)
ENDCATCH
END