Selective XML Index feature is not supported for the current database version , SQL Server Extended Events , Optimizing Reading from XML column datatype

Question

Team , Thanks for looking into this  ..
As a last resort on  optimizing my stored procedure ( Below ) i wanted to create a Selective XML index  ( Normal XML indexes doesn't seem to be improving performance as needed ) but i keep getting this error within my stored proc . Selective XML
Index feature is not supported for the current database version.. How ever
EXECUTE sys.sp_db_selective_xml_index; return 1 , stating Selective XML Indexes are enabled on my current database .
Is there ANY alternative way i can optimize below stored proc ?
Thanks in advance for your response(s) !
/****** Object: StoredProcedure [dbo].[MN_Process_DDLSchema_Changes] Script Date: 3/11/2015 3:10:42 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- EXEC [dbo].[MN_Process_DDLSchema_Changes]
ALTER PROCEDURE [dbo].[MN_Process_DDLSchema_Changes]
AS
BEGIN
SET NOCOUNT ON --Does'nt have impact ( May be this wont on SQL Server Extended events session's being created on Server(s) , DB's )
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED
select getdate() as getdate_0
DECLARE @XML XML , @Prev_Insertion_time DATETIME
-- Staging Previous Load time for filtering purpose ( Performance optimize while on insert )
SET @Prev_Insertion_time = (SELECT MAX(EE_Time_Stamp) FROM dbo.MN_DDLSchema_Changes_log ) -- Perf Optimize
-- PRINT '1'
CREATE TABLE #Temp
EventName VARCHAR(100),
Time_Stamp_EE DATETIME,
ObjectName VARCHAR(100),
ObjectType VARCHAR(100),
DbName VARCHAR(100),
ddl_Phase VARCHAR(50),
ClientAppName VARCHAR(2000),
ClientHostName VARCHAR(100),
server_instance_name VARCHAR(100),
ServerPrincipalName VARCHAR(100),
nt_username varchar(100),
SqlText NVARCHAR(MAX)
CREATE TABLE #XML_Hold
ID INT NOT NULL IDENTITY(1,1) PRIMARY KEY , -- PK necessity for Indexing on XML Col
BufferXml XML
select getdate() as getdate_01
INSERT INTO #XML_Hold (BufferXml)
SELECT
CAST(target_data AS XML) AS BufferXml -- Buffer Storage from SQL Extended Event(s) , Looks like there is a limitation with xml size ?? Need to re-search .
FROM sys.dm_xe_session_targets xet
INNER JOIN sys.dm_xe_sessions xes
ON xes.address = xet.event_session_address
WHERE xes.name = 'Capture DDL Schema Changes' --Ryelugu : 03/05/2015 Session being created withing SQL Server Extended Events
--RETURN
--SELECT * FROM #XML_Hold
select getdate() as getdate_1
-- 03/10/2015 RYelugu : Error while creating XML Index : Selective XML Index feature is not supported for the current database version
CREATE SELECTIVE XML INDEX SXI_TimeStamp ON #XML_Hold(BufferXml)
FOR
PathTimeStamp ='/RingBufferTarget/event/timestamp' AS XQUERY 'node()'
--RETURN
--CREATE PRIMARY XML INDEX [IX_XML_Hold] ON #XML_Hold(BufferXml) -- Ryelugu 03/09/2015 - Primary Index
--SELECT GETDATE() AS GETDATE_2
-- RYelugu 03/10/2015 -Creating secondary XML index doesnt make significant improvement at Query Optimizer , Instead creation takes more time , Only primary should be good here
--CREATE XML INDEX [IX_XML_Hold_values] ON #XML_Hold(BufferXml) -- Ryelugu 03/09/2015 - Primary Index , --There should exists a Primary for a secondary creation
--USING XML INDEX [IX_XML_Hold]
---- FOR VALUE
-- --FOR PROPERTY
-- FOR PATH
--SELECT GETDATE() AS GETDATE_3
--PRINT '2'
-- RETURN
SELECT GETDATE() GETDATE_3
INSERT INTO #Temp
EventName ,
Time_Stamp_EE ,
ObjectName ,
ObjectType,
DbName ,
ddl_Phase ,
ClientAppName ,
ClientHostName,
server_instance_name,
nt_username,
ServerPrincipalName ,
SqlText
SELECT
p.q.value('@name[1]','varchar(100)') AS eventname,
p.q.value('@timestamp[1]','datetime') AS timestampvalue,
p.q.value('(./data[@name="object_name"]/value)[1]','varchar(100)') AS objectname,
p.q.value('(./data[@name="object_type"]/text)[1]','varchar(100)') AS ObjectType,
p.q.value('(./action[@name="database_name"]/value)[1]','varchar(100)') AS databasename,
p.q.value('(./data[@name="ddl_phase"]/text)[1]','varchar(100)') AS ddl_phase,
p.q.value('(./action[@name="client_app_name"]/value)[1]','varchar(100)') AS clientappname,
p.q.value('(./action[@name="client_hostname"]/value)[1]','varchar(100)') AS clienthostname,
p.q.value('(./action[@name="server_instance_name"]/value)[1]','varchar(100)') AS server_instance_name,
p.q.value('(./action[@name="nt_username"]/value)[1]','varchar(100)') AS nt_username,
p.q.value('(./action[@name="server_principal_name"]/value)[1]','varchar(100)') AS serverprincipalname,
p.q.value('(./action[@name="sql_text"]/value)[1]','Nvarchar(max)') AS sqltext
FROM #XML_Hold
CROSS APPLY BufferXml.nodes('/RingBufferTarget/event')p(q)
WHERE -- Ryelugu 03/05/2015 - Perf Optimize - Filtering the Buffered XML so as not to lookup at previoulsy loaded records into stage table
p.q.value('@timestamp[1]','datetime') >= ISNULL(@Prev_Insertion_time ,p.q.value('@timestamp[1]','datetime'))
AND p.q.value('(./data[@name="ddl_phase"]/text)[1]','varchar(100)') ='Commit' --Ryelugu 03/06/2015 - Every Event records a begin version and a commit version into Buffer ( XML ) we need the committed version
AND p.q.value('(./data[@name="object_type"]/text)[1]','varchar(100)') <> 'STATISTICS' --Ryelugu 03/06/2015 - May be SQL Server Internally Creates Statistics for #Temp tables , we do not want Creation of STATISTICS Statement to be logged
AND p.q.value('(./data[@name="object_name"]/value)[1]','varchar(100)') NOT LIKE '%#%' -- Any stored proc which creates a temp table within it Extended Event does capture this creation statement SQL as well , we dont need it though
AND p.q.value('(./action[@name="client_app_name"]/value)[1]','varchar(100)') <> 'Replication Monitor' --Ryelugu : 03/09/2015 We do not want any records being caprutred by Replication Monitor ??
SELECT GETDATE() GETDATE_4
-- SELECT * FROM #TEMP
-- SELECT COUNT(*) FROM #TEMP
-- SELECT GETDATE()
-- RETURN
-- PRINT '3'
--RETURN
INSERT INTO [dbo].[MN_DDLSchema_Changes_log]
[UserName]
,[DbName]
,[ObjectName]
,[client_app_name]
,[ClientHostName]
,[ServerName]
,[SQL_TEXT]
,[EE_Time_Stamp]
,[Event_Name]
SELECT
CASE WHEN T.nt_username IS NULL OR LEN(T.nt_username) = 0 THEN t.ServerPrincipalName
ELSE T.nt_username
END
,T.DbName
,T.objectname
,T.clientappname
,t.ClientHostName
,T.server_instance_name
,T.sqltext
,T.Time_Stamp_EE
,T.eventname
FROM
#TEMP T
/** -- RYelugu 03/06/2015 - Filters are now being applied directly while retrieving records from BUFFER or on XML
-- Ryelugu 03/15/2015 - More filters are likely to be added on further testing
WHERE ddl_Phase ='Commit'
AND ObjectType <> 'STATISTICS' --Ryelugu 03/06/2015 - May be SQL Server Internally Creates Statistics for #Temp tables , we do not want Creation of STATISTICS Statement to be logged
AND ObjectName NOT LIKE '%#%' -- Any stored proc which creates a temp table within it Extended Event does capture this creation statement SQL as well , we dont need it though
AND T.Time_Stamp_EE >= @Prev_Insertion_time --Ryelugu 03/05/2015 - Performance Optimize
AND NOT EXISTS ( SELECT 1 FROM [dbo].[MN_DDLSchema_Changes_log] MN
WHERE MN.[ServerName] = T.server_instance_name -- Ryelugu Server Name needes to be added on to to xml ( Events in session )
AND MN.[DbName] = T.DbName
AND MN.[Event_Name] = T.EventName
AND MN.[ObjectName]= T.ObjectName
AND MN.[EE_Time_Stamp] = T.Time_Stamp_EE
AND MN.[SQL_TEXT] =T.SqlText -- Ryelugu 03/05/2015 This is a comparision Metric as well , But needs to decide on
-- Peformance Factor here , Will take advise from Lance if comparision on varchar(max) is a vital idea
--SELECT GETDATE()
--PRINT '4'
--RETURN
SELECT
top 100
[EE_Time_Stamp]
,[ServerName]
,[DbName]
,[Event_Name]
,[ObjectName]
,[UserName]
,[SQL_TEXT]
,[client_app_name]
,[Created_Date]
,[ClientHostName]
FROM
[dbo].[MN_DDLSchema_Changes_log]
ORDER BY [EE_Time_Stamp] desc
-- select getdate()
-- ** DELETE EVENTS after logging into Physical table
-- NEED TO Identify if this @XML can be updated into physical system table such that previously loaded events are left untoched
-- SET @XML.modify('delete /event/class/.[@timestamp="2015-03-06T13:01:19.020Z"]')
-- SELECT @XML
SELECT GETDATE() GETDATE_5
END
GO
Rajkumar Yelugu

Answer 1

@@Version : ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Microsoft SQL Server 2012 - 11.0.5058.0 (X64)
    May 14 2014 18:34:29
    Copyright (c) Microsoft Corporation
    Developer Edition (64-bit) on Windows NT 6.2 <X64> (Build 9200: ) (Hypervisor)
(1 row(s) affected)
Compatibility level is set to 110 .
One of the limitation states - XML columns with a depth of more than 128 nested nodes
How do i verify this ? Thanks .
Rajkumar Yelugu