Me doy cuenta de que este problema ya se resolvió, pero estaba interesado en cómo podría resolverse utilizando los eventos extendidos de SQL Server 2008. Este es mi primer juego con XEvents, ¡así que estoy seguro de que hay mucho que mejorar!
Script para configurar la base de datos de prueba
CREATE TABLE [dbo].[TableWithMysteryUpdate](
[Period] [int] NOT NULL,
[ColumnThatWillBeUpdated] [int] NOT NULL
) ON [PRIMARY]
GO
INSERT [dbo].[TableWithMysteryUpdate] ([Period], [ColumnThatWillBeUpdated]) VALUES (1, 20)
INSERT [dbo].[TableWithMysteryUpdate] ([Period], [ColumnThatWillBeUpdated]) VALUES (2, 23)
GO
CREATE TABLE [dbo].[TestTable](
[foo] [int] IDENTITY(1,1) NOT NULL,
[bar] [nchar](10) NOT NULL,
CONSTRAINT [PK_TestTable] PRIMARY KEY CLUSTERED
(
[foo] ASC
)
)
GO
CREATE TRIGGER [dbo].[triggerCausingMysteryUpdate]
ON [dbo].[TestTable]
AFTER INSERT
AS
BEGIN
SET NOCOUNT ON;
UPDATE [dbo].[TableWithMysteryUpdate]
SET [Period] = [Period]+1
END
GO
CREATE PROCEDURE [dbo].[Proc4]
AS
BEGIN
INSERT INTO [dbo].[TestTable]
(
[bar])
VALUES
('Test')
END
GO
CREATE PROCEDURE [dbo].[Proc3]
AS
BEGIN
EXEC dbo.Proc4
END
GO
CREATE PROCEDURE [dbo].[Proc2]
AS
BEGIN
EXEC dbo.Proc3
END
GO
CREATE PROCEDURE [dbo].[Proc1]
AS
BEGIN
EXEC dbo.Proc2
END
Entonces el escenario es que TableWithMysteryUpdate se está actualizando, pero no estoy seguro de por qué. Agregaré un disparador de actualización que no hace nada para poder filtrar este objeto.
CREATE TRIGGER [dbo].[triggerAfterUpdate]
ON [dbo].[TableWithMysteryUpdate]
AFTER UPDATE
AS
BEGIN
SET NOCOUNT ON;
END
A continuación, ejecute el script para crear la sesión de XEvents, active el procedimiento que finalmente desactivará la pila de llamadas y hará que se produzca la actualización y, a continuación, detenga la sesión.
USE TestDB
DECLARE @DynSql nvarchar(max)
SET @DynSql = '
IF EXISTS(SELECT * FROM sys.server_event_sessions WHERE name=''test_trace'')
DROP EVENT SESSION [test_trace] ON SERVER;
CREATE EVENT SESSION [test_trace]
ON SERVER
ADD EVENT sqlserver.sql_statement_completed(
ACTION (package0.callstack, sqlserver.session_id, sqlserver.sql_text, sqlserver.tsql_stack)
WHERE (object_id = ' + cast(object_id('[dbo].[triggerAfterUpdate]') as varchar(10)) + ')
)
,
ADD EVENT sqlserver.sp_statement_completed(
ACTION (package0.callstack, sqlserver.session_id, sqlserver.sql_text, sqlserver.tsql_stack)
WHERE (object_id = ' + cast(object_id('[dbo].[triggerAfterUpdate]') as varchar(10)) + ')
)
ADD TARGET package0.asynchronous_file_target
(set filename = ''c:\temp\test_trace.xel'' , metadatafile = ''c:\temp\test_trace.xem'')
ALTER EVENT SESSION [test_trace] ON SERVER STATE = START
'
EXEC sp_executesql @DynSql
GO
EXEC dbo.Proc1
GO
ALTER EVENT SESSION [test_trace] ON SERVER STATE = STOP
Los datos de seguimiento se pueden leer con
SELECT CONVERT (XML, event_data) AS data
FROM sys.fn_xe_file_target_read_file ('C:\Temp\test_trace*.xel', 'C:\Temp\test_trace*.xem', NULL, NULL)
La parte de la pila de llamadas es
<action name="tsql_stack" package="sqlserver">
<value><frame level='1' handle='0x03000800E8EA0D0612E4EB00A59D00000000000000000000' line='6' offsetStart='228' offsetEnd='264'/>
<frame level='2' handle='0x03000800921155002C81E700A59D00000000000000000000' line='8' offsetStart='258' offsetEnd='398'/>
<frame level='3' handle='0x03000800CB3549012F81E700A59D00000100000000000000' line='5' offsetStart='90' offsetEnd='284'/>
<frame level='4' handle='0x03000800045A3D022F81E700A59D00000100000000000000' line='5' offsetStart='90' offsetEnd='120'/>
<frame level='5' handle='0x030008003D7E31033081E700A59D00000100000000000000' line='5' offsetStart='90' offsetEnd='120'/>
<frame level='6' handle='0x0300080076A225043081E700A59D00000100000000000000' line='5' offsetStart='90' offsetEnd='120'/>
<frame level='7' handle='0x010008002E775203603D9A0D000000000000000000000000' line='2' offsetStart='4' offsetEnd='-1'/></value>
<text />
</action>
Unirse a los DMV
WITH CapturedResults AS
( SELECT data.value ( '(/event/@timestamp)[1]', 'DATETIME') AS [TIME],
data.value ( '(/event/data[@name=''cpu'']/value)[1]', 'INT') AS [CPU (ms)],
CONVERT (FLOAT, data.value ('(/event/data[@name=''duration'']/value)[1]', 'BIGINT')) / 1000000 AS [Duration (s)],
data.value ( '(/event/action[@name=''sql_text'']/value)[1]', 'VARCHAR(MAX)') AS [SQL STATEMENT],
CAST(data.value('(/event/action[@name="tsql_stack"]/value)[1]','varchar(MAX)') AS XML) AS [stack_xml]
FROM (SELECT CONVERT (XML, event_data) AS data
FROM sys.fn_xe_file_target_read_file ('C:\Temp\test_trace*.xel', 'C:\Temp\test_trace*.xem', NULL, NULL)
)
entries
)
,
StackData AS
( SELECT frame_xml.value('(./@level)', 'int') AS [frame_level],
frame_xml.value('(./@handle)', 'varchar(MAX)') AS [sql_handle],
frame_xml.value('(./@offsetStart)', 'int') AS [offset_start],
frame_xml.value('(./@offsetEnd)', 'int') AS [offset_end]
FROM CapturedResults CROSS APPLY stack_xml.nodes('//frame') N (frame_xml)
)
SELECT sd.frame_level,
object_name(st.objectid, st.dbid) AS ObjectName,
SUBSTRING(st.text, (sd.offset_start/2)+1, ((
CASE sd.offset_end
WHEN -1
THEN DATALENGTH(st.text)
ELSE sd.offset_end
END - sd.offset_start)/2) + 1) AS statement_text,
qp.query_plan,
qs2.creation_time,
qs2.last_execution_time,
qs2.execution_count
FROM StackData AS sd CROSS APPLY sys.dm_exec_sql_text(CONVERT(VARBINARY(MAX),sd.sql_handle,1)) AS st
LEFT OUTER JOIN sys.dm_exec_query_stats qs2
ON qs2.sql_handle = CONVERT(VARBINARY(MAX),sd.sql_handle,1) OUTER APPLY sys.dm_exec_query_plan(CONVERT(VARBINARY(MAX),qs2.plan_handle,1)) AS qp
da resultados (mostrando toda la pila de llamadas tsql)
