I need to find top level node details from xml Execution Plan .
Code :
select distinct mgrCorpID
from
(
select DISTINCT cd.EmpCorpID, cd.EmpName, cd.mgrCorpID, cd.mgrName ,userrole.ROLE
FROM T_Staging_BWDRE_USERROLE AS userrole
INNER JOIN T_Staging_BWDRE_USER AS user2 ON userrole.ID = user2.USERROLEID
[code]....
The benefit of the actual execution plan is that you can see the actual number of rows passing through each step - compared to the estimated number of rows.But what about the "cost percentages" ?I believe I've read somewhere that these percentages is still just an estimate and is not based on the real execution.Does anyone know this and preferable have a link to something that documents it?Thanks
View 1 Replies View RelatedHi,I haev the following code:DECLARE @x xmlSET @x='<Root><row id="1"><name>Larry</name><oflw>some text</oflw></row><row id="2"><name>Joe</name></row><row id="3" /></Root>'exec sp_xml_preparedocument @idoc OUTPUT, @xSELECT * FROM OPENXML(@idoc, '/Root')This gives the following detailsidparentidnodetype localnameprefixnamespaceuridatatypeprev textI want to get the same details using XQuery, please let me know how togo about it.Regards,Shilpa
View 2 Replies View RelatedIs it possible to find the version details from IP and Port.
For example I have IP and port number known to me ,but I don't have database credentials and other details.
I want to know which version of Sql server is running.
My purpose is to find the false vulnerabilities in security scanning.
hi,
How to get 2 level tree node in the sql server 2005. We have table with data.On load we populate the tree in Asp.net.
Regards,
Vinayak Panchal
I have a job that executes an ssis package. The SSIS package executes successfully in business intelligence Studio however when I make it into a job I get the error message in the topic title. The log file isnt any more helpful which simply says "The package execution failed. The step failed."
I have no idea how to diagnose this problem!
When you run a deployed package manually, there is a nice load of information output showing you what is going on, this would be very good log file info. Is there anyway to write the same output to a log file when the package is run as a Job from SQL Agent?
View 4 Replies View RelatedI want to dynamically build a page for a given stored proc.
Given the name of the sproc how can i return the names, datatypes & sizes of the parameters ?
I then needs to find the fields in the result set to generate the page.
Any ideas ?
I'm new to SQL server but familiar enough with databases to know this doesn't seem right.
Here's the situation:
I have a table with real estate property information. There are about 650,000 rows in it. I have a nonclustered non-unique index on the city where the property is located. There are about 40 unique values in this index.
I do a simple query like:
SELECT city,address from propinfo where city= 'CARLSBAD'. The query will return about 4,000 rows. The problem is that the execution plan that it chooses is to do a full table scan. I.E. Even though there is an index on City, it chooses to look through 650,000 rows rather than do an index seek. Something sounds inefficient here. BTW, this happens in both SQL 7 and SQL 2000. Can anyone explain why this happens? I've got to think that SQL Server is more efficient here.
Hello, I have been looking at the execution plan for a procedure call and the select, compute scalar, stream aggregates, constant scan, nested loops, asserts are all at 0% cost, the PK costs are 2% apart from a rogue 7% and a few 20%, tables scans are all at 23%. The query cost realtive to the batch is 100%. What does this all mean?
I have put non-clustered indexes on all the table attributes that are involved in the select statements but this has made no difference, i am guessing this is because my tables are not heavily populated and i may have seen a difference if i had thousands of entries in the tables the select statements acted on, is this assumption correct?
Does anyone else bother using the execution plan to tweak there DB or is it a negligible tool?
Jill
In sql server 2005 management studio where do I find the option to run the sql query in the query analyser and also show the execution plan?
At present I see the option under Query menu which is "Display estimated Execution plan" which only shows the plan but does not execute the query.
Thanks
Does anyone know of a good way to copy the execution plan when using "Include Actual Execution Plan"?
I often need to copy this and mail it.
I know I can use PrintScreen button, but I need a more efficient way to do this.
If I just could rightclick the execution plan and select "Copy" and get complete plan it would be great.
Mladen?
E 12°55'05.25"
N 56°04'39.16"
Which of the following does NOT cause the execution plan of a query to berecompiled ?- new column is added to a table accessed by a query OR- index used by a query has been dropped from the database OR- query perfoms a join to return data from multiple tables OR- significant amount of data in a table has been mofified
View 1 Replies View RelatedHi,I have a table-valued user defined function (UDF) my_fnc.The execution of statement "select * from my_fnc" takes much longertime than runnig the code inside my_fnc (with necessary changes).What can be the reason?How can I see an execution plan used for UDF?Thanks a lotMartin
View 1 Replies View RelatedThis function will generate all DELETE statements in correct order to perform a CASCADING delete.
For self-joined tables, it will generate the T-SQL code to "unwind" the table, also in correct order!CREATE FUNCTION dbo.fnCascadingDelete
(
@Schema NVARCHAR(128) = NULL,
@Table NVARCHAR(128) = NULL
)
RETURNS@Return TABLE
(
RowID INT PRIMARY KEY CLUSTERED,
IsSelfJoin TINYINT NOT NULL,
HasPk TINYINT NOT NULL,
[SQL] NVARCHAR(4000) NOT NULL
)
AS
BEGIN
DECLARE@Constraints TABLE
(
RowID INT NOT NULL,
Indent SMALLINT NOT NULL,
[Catalog] NVARCHAR(128) NOT NULL,
[Schema] NVARCHAR(128) NOT NULL,
[Table] NVARCHAR(128) NOT NULL,
[Column] NVARCHAR(128),
pkCatalog NVARCHAR(128),
pkSchema NVARCHAR(128),
pkTable NVARCHAR(128),
pkColumn NVARCHAR(128),
pkType NVARCHAR(128),
pkSize INT,
IsSelfJoin TINYINT NOT NULL,
HasPk TINYINT NOT NULL
)
INSERT@Constraints
(
RowID,
Indent,
[Catalog],
[Schema],
[Table],
[Column],
pkCatalog,
pkSchema,
pkTable,
pkColumn,
pkType,
pkSize,
IsSelfJoin,
HasPk
)
SELECTRowID,
Indent,
[Catalog],
[Schema],
[Table],
[Column],
pkCatalog,
pkSchema,
pkTable,
pkColumn,
pkType,
pkSize,
SelfJoin,
CASE
WHEN [Column] IS NULL THEN 0
ELSE 1
END
FROMdbo.fnTableTree(@Schema, @Table)
IF @@ROWCOUNT = 0
RETURN
DECLARE@SQL TABLE
(
ID INT IDENTITY(1, 1),
RowID INT PRIMARY KEY CLUSTERED,
IsSelfJoin TINYINT NOT NULL,
HasPk TINYINT NOT NULL,
[SQL] NVARCHAR(4000) NOT NULL
)
DECLARE@Indent SMALLINT,
@RowID INT,
@ID INT,
@TSQL NVARCHAR(4000),
@RowSQL NVARCHAR(4000),
@EndSQL NVARCHAR(4000),
@pkColumn NVARCHAR(128),
@IsSelfJoin TINYINT,
@HasPk TINYINT
DECLARE@Unwind TABLE
(
RowID INT NOT NULL,
StepID INT IDENTITY(0, 1) PRIMARY KEY NONCLUSTERED,
[SQL] NVARCHAR(4000)
)
WHILE NOT EXISTS (SELECT * FROM @SQL WHERE RowID = 1)
BEGIN
SELECT TOP 1@RowID = c.RowID,
@ID = c.RowID,
@Indent = c.Indent,
@TSQL = N'',
@EndSQL = N'',
@IsSelfJoin = c.IsSelfjoin,
@HasPk = c.HasPk
FROM@Constraints AS c
LEFT JOIN@SQL AS s ON s.RowID = c.RowID
WHEREs.RowID IS NULL
ORDER BYc.Indent DESC,
c.RowID DESC
WHILE @ID > 0
BEGIN
IF @Indent = 0
SELECT@RowSQL = N'DELETE t' + CAST(@RowID AS NVARCHAR(12)),
@RowSQL = @RowSQL + N' FROM ' + QUOTENAME(c.[Catalog]) + N'.' + QUOTENAME(c.[Schema]) + N'.' + QUOTENAME(c.[Table]) + N' AS t' + CAST(@ID AS NVARCHAR(12)),
@EndSQL = N' WHERE t' + CAST(@ID AS NVARCHAR(12)) + '.' + QUOTENAME(COALESCE(c.[Column], '%0')) + N' = ''%1''',
@IsSelfJoin = @IsSelfJoin | c.IsSelfJoin
FROM@Constraints AS c
WHEREc.RowID = @ID
ELSE
SELECT@RowSQL = N' INNER JOIN ' + QUOTENAME(c.[Catalog]) + N'.' + QUOTENAME(c.[Schema]) + N'.' + QUOTENAME(c.[Table]),
@RowSQL = @RowSQL + N' AS t' + CAST(@ID AS NVARCHAR(12)) + N' ON t' + CAST(@ID AS NVARCHAR(12)) + N'.' + QUOTENAME(c.[Column]),
@pkColumn = QUOTENAME(c.pkColumn),
@IsSelfJoin = @IsSelfJoin | c.IsSelfJoin
FROM@Constraints AS c
WHEREc.RowID = @ID
SELECT TOP 1@ID = c.RowID,
@Indent = c.Indent,
@RowSQL = @RowSQL + N' = t' + CAST(c.RowID AS NVARCHAR(12)) + N'.' + @pkColumn,
@IsSelfJoin = @IsSelfJoin | c.IsSelfJoin
FROM@Constraints AS c
WHEREc.RowID < @ID
AND c.Indent < @Indent
ORDER BYc.Indent DESC,
c.RowID DESC
IF @@ROWCOUNT = 0
SET@ID = 0
SET@TSQL = @RowSQL + @TSQL
END
INSERT@SQL
(
RowID,
IsSelfJoin,
HasPk,
[SQL]
)
VALUES(
@RowID,
@IsSelfJoin,
@HasPk,
@TSQL + @EndSQL
)
IF @IsSelfJoin = 1
BEGIN
DECLARE@Yak NVARCHAR(160),
@Catalog NVARCHAR(128),
@Column NVARCHAR(128)
SELECT@Yak = pkType + COALESCE('(' + CAST(pkSize AS NVARCHAR(12)) + ')', ''),
@Catalog = [Catalog],
@Schema = [Schema],
@Table = [Table],
@Column = [Column],
@Catalog = [Catalog],
@Table = [Table],
@pkColumn = pkColumn
FROM@Constraints
WHERERowID = @RowID
SET@RowSQL = 'DECLARE@Lvl INT
SET@Lvl = 0
DECLARE@Stage TABLE (RowID INT IDENTITY(0, 1), Lvl INT, RowKey ' + @Yak + ')
INSERT @Stage (Lvl, RowKey) '
+ REPLACE(@TSQL + @EndSQL, 'DELETE t' + CAST(@RowID AS NVARCHAR(12)) + '', 'SELECT 0, t' + CAST(@RowID AS NVARCHAR(12)) + '.' + QUOTENAME(@Column) + '')
+ ' WHILE @@ROWCOUNT > 0
BEGIN
SET@Lvl = @Lvl + 1
INSERT@Stage (Lvl, RowKey)
SELECT@Lvl,
t.' + QUOTENAME(@pkColumn) + '
FROM' + QUOTENAME(@Catalog) + '.' + QUOTENAME(@Schema) + '.' + QUOTENAME(@Table) + ' AS t
INNER JOIN@Stage AS s ON s.RowKey = t.' + QUOTENAME(@Column) + '
AND s.Lvl = @Lvl - 1
LEFT JOIN@Stage AS cr ON cr.RowKey = t.' + QUOTENAME(@pkColumn) + '
WHEREcr.RowKey IS NULL
END
SELECT ''DELETE FROM ' + QUOTENAME(@Catalog) + '.' + QUOTENAME(@Schema) + '.' + QUOTENAME(@Table) + ' WHERE ' + QUOTENAME(@pkColumn) + ' = '' + QUOTENAME(RowKey, '''''''')
FROM @Stage
WHERE RowID > 0
ORDER BY RowID DESC'
INSERT@Unwind
(
RowID,
[SQL]
)
VALUES(
@RowID,
@RowSQL
)
END
END
INSERT@Return
(
RowID,
IsSelfJoin,
HasPk,
[SQL]
)
SELECTs.ID,
s.IsSelfJoin,
s.HasPk,
CASE
WHEN u.RowID IS NULL THEN s.[SQL]
ELSE u.[SQL]
END
FROM@SQL AS s
LEFT JOIN@Unwind AS u ON u.RowID = s.RowID
ORDER BYs.ID,
u.StepID
RETURN
ENDE 12°55'05.25"
N 56°04'39.16"
Hi,I want to access the real execution plan via my webapplication after I have executed an SQL statement. I know how to get the estimated execution plan:1 cmd.CommandText = "SET SHOWPLAN_XML ON";2 cmd.ExecuteNonQuery();3 4 cmd.CommandText = myStatement;5 SqlDataReader dataReader = cmd.ExecuteReader();6 7 String plan = String.Empty;8 9 while (dataReader.Read()) {10 plan += dataReader.GetSqlString(0).ToString();11 }12 13 cmd.CommandText = "SET SHOWPLAN_XML OFF";14 cmd.ExecuteNonQuery();I want do compare the estimated costs with the real costs of the same statement. If I change code line 1 an 13 to "SET STATISTICS XML [ON|OFF]" the string "plan" will contain the result of the submitted SELECT statement, but I just need to get the plan and not the result itself. Thanks in Advance,Dominik
View 6 Replies View RelatedWhat does 'tablename. index... cost: 100%' mean when I use display estimated execution plan?
View 1 Replies View RelatedHello ,
I wanted to know whether we have an execution plan enabled in SQL 6.5 as we have it in SQL 7.0 and SQL 2000 .
I.e when we execute a query and if we enable ' show execution plan 'then it creates a map and shows the vital statistics .
If that is available on SQL 6.5 then i am missing that tool .
How can i have it installed on my SQL 6.5 server ??
Thanks.
Hi,
I want to know how to analyze query execution plan for complex queries and what information is useful from that for improving the performance. I have gone through details in some sites like www.like sql-performance.com (http://www.sql-server-performance.com/query_execution_plan_analysis.asp), where it was more generic. I want more info regarding this.
Can any one tell about the resources for this or do you have any white papers or documents, which you can share with me.
Thanks in advance,
sekhar
Hi ,
when
operator = then index SEEK
operator <> then index SCAN
Is normal ?
Example
SELECT *
FROM dbo.Batch
WHERE (Status = 'Batch Completed')
(1 row(s) affected)
StmtText
---------------------------------------------------------------------------------------------------------------------------------
|--Bookmark Lookup(BOOKMARK:([Bmk1000]), OBJECT:([PriceAvisPr].[dbo].[Batch]))
|--Index Seek(OBJECT:([PriceAvisPr].[dbo].[Batch].[IX_Batch]), SEEK:([Batch].[Status]='Batch Completed') ORDERED FORWARD)
StmtText
---------------------------------------------------------------------------------
SELECT *
FROM dbo.Batch
WHERE (Status <> 'Batch Completed')
(1 row(s) affected)
StmtText
------------------------------------------------------------------------------------------------------------------------
|--Clustered Index Scan(OBJECT:([PriceAvisPr].[dbo].[Batch].[PK_Batch]), WHERE:([Batch].[Status]<>'Batch Completed'))
Hi all,
I am experiencing performance problems with one of my stored procedures. When the stored procedure is first compiled an executed, it behaves as expected (it usually takes 1 or 2 seconds to complete). But its performace it is degradated, so in 1 day, it usually takes 120 seconds to complete !!!. Once the stored procedure is compiled, its performance it is then the expected.
It is a complex stored procedure with two integer parameters with only one select, but composed by multiple views and sub-queries. We have been trying to break the query into small pieces using temporary tables but without success. The SQL Profiler shows an unusual number of reads when it goes wrong (more than a million reads).
I think the problem is in the execution plan. I know than compiling the stored procedure, the problem is fixed, but I do not know exactly when and why it starts to happen.
The stored procedure is running under the following configuration:
- Microsoft SQL Server Standard Edition (64-bit).
- Version: 9.00.1399.06
- RAM 16 MB
- 8 CPUs
Anyone has any ideas or possible solutions?
Thanks in advance,
Carlos.
The cost of query with usage of functions is as same as that of withoutfunctionsIn the below code, the query cost of insert is 0.02% and two selectstatements costs same 0.04%Declare @t table(mydate datetime)Declare @i intset @i=1while @i<=5000Begininsert into @t values(getdate())set @i=@i+1EndSelect mydate from @tSelect convert(varchar,mydate,112) from @tBut I thought usage of convert function will take more query costWhat do you think of this?Madhivanan
View 5 Replies View RelatedWe've got as slightly unusual scenario happening whereby a statement ispassed to SQL which consists of two parts.BEGIN TRANSACTIONDELETE * FROM WhateverBULK INSERT INTO Whatever...(etc)COMMIT TRANSACTIONThe first is a deletion of the data and the second is the bulk insertof replacement data into that table. The error that we see is aviolation of the primary key (composite).The violation only happens if we run both processes together. If we runone, then the other, it works fine. If we set a line by line insert, itworks fine.My suspicion is that the execution plan that is being run is mostlikely working the two parts in parallel and that the records stillexist at the point that the insert is happening. Truncate is not anoption. The bulk insert was added for performance reasons. There is anoption of trying the bulk insert, and if that fails, do the line byline insert, but it's far from ideal.I think we can probably wrap this into two individual transactionswithin the one statement as follows :BEGIN TRANSACTIONDELETE * FROM WhateverCOMMIT TRANSACTIONBEGIN TRANSACTIONBULK INSERT INTO Whatever...(etc)COMMIT TRANSACTIONWill this give sufficient hint to SQL about the order it processes itso that it completes as we intend and not as it sees being the mostefficient method ?Or, is there a better approach to this ?I've seen that some hints can be passed to SQL for optimizing, but myunderstanding was that it was always better to trust the optimiser andre-work the query as needed.With the server having two processors, is it feasible that one is doingone part and the other processor the other part in parallel ? Willtelling it to use a single processor be worthwhile looking at ? MAXDOP1 ?Finally, I'd imagine that the insert is quicker to process than thedeletion. Is this correct ?ThanksRyan
View 14 Replies View RelatedUsing SQL Server 2000 SP4.There is a relatively complex stored procedure that usually completes inless than 20 seconds. Occasionally it times out after 180 seconds. The SPis called via ADO 2.8, using adCmdStoredProc command type. If I useProfiler to capture the EXEC that ADO sends to run the procedure, and runthat from QA, the procedure completes in less than 20 seconds as it should.The procedure is created WITH RECOMPILE. One additional twist is thatsp_setapprole is called from the client before running the procedure inquestion. This may be irrelevant, because even if I include the samesp_setapprole call when running the procedure from QA, it still executesquickly, and even if I comment out the call to sp_setapprole in the clientcode, the proc still times out when run from the client.The only thing that fixes it, at least for a day or two, is DBCCFREEPROCCACHE. So it appears that a bad plan is somehow stuck in memory andis only used when the procedure is called from the client app, and is notflushed even though the procedure was created WITH RECOMPILE.Other than scheduling the DBCC call to run every night, is there anythingelse I could try to get this resolved? Thanks.--(remove a 9 to reply by email)
View 5 Replies View RelatedI was hoping someone could shed some light on wierd situation i'm experiencing. I have the following query:
select count(*) LeadCount
from auto_leads al
where received > dbo.GetDay(GetDate())
dbo.GetDay simply returns a smalldatetime value of today's date.
Now I recently got thrown into a data mess and for some reason this query takes 8 seconds to run. Now the first thing I did was update the stats on the Received column of this auto_leads table. I re-run the query and I'm still getting 8 seconds. I look at the execution plan I can make figure out why this is happening.
I then change the above query so the filter received > dbo.GetDay(GetDate()) is now just received > '5/31/2006' and the query comes back immediately. This doesn't make sense to me because the GetDay function is really simple and comes back immediately. I then try the following query to confirm it isn't a problem with the GetDay function:
declare @Today DateTime
set @Today = dbo.getday(GetDate())
select count(*) leads
from auto_leads al
join type_lead_status tls on (tls.type_lead_status_id = al.type_lead_status_id)
where received > @Today
Sure enough, the query came back immediately. Next thing to go through my mind is that the query execution plan has been cached by SQL Server using the execution plan from before I updated the stats on the received column. So I executed sp_recompile 'auto_leads' and tryed the original query again. Still taking 8-10 seconds to come back.
So my question, is why when I remove the GetDay function call in my query filter is the query slow, as opposed to me just passing a variable into the query? Thanks!
- James
I'm new to sql server 2005 and was reviewing the execution plan on one of my queries.
I have a query that selects about 62,000 rows from a table of about 20 million
I see there is a index seek indicated but further down the execution plan I see that a large percent is being assigned to a RID LOOKUP on the same table.
Should I be concerned with this and if so, what would you recommend I do to correct it?
Hi,
We migrated our database from SQL Server 2000 to Yukon last week. Now, when we run our application it has slowed down. We analyzed some stored procedure and they seems to have degarded. The execution plan has changed. Now, this looks like there's lot of work if we have to tune each query w.r.t the new execution plan. Our application has around 4000 stored procs. Is anyone aware of some generic pattern or solution such that these exection plans problem can resolved? Also, does the new execution plan ensure that the once we tune stored procs will perform better than SQL Server 2000.
Need help on this, otherwise it seems we might have to move back to 2000.
Thanks in Advance
Ritesh
Hi all,
I€™m having a test regarding to the image data type. The test program is written with sql native api and just update the image data type column, but I looked the SQL Compilations/sec and Batch Requests/sec counters in SQLServer:QL Statistics using Perfmon, both values are almost the same. It seemed whenever the stored procedure is called, SQLServer compiles it and makes execution plan again. But when I had a test without image data type, SQL Compilation/sec was 0. SQL version is Microsoft SQL Server 2005 - 9.00.3054.00 (Intel X86) (Build 2600: Service Pack 2).
Is SQL server working the way expected or am I missing something?
I am running one maintenance plan which includes just "Chech DB Integrity" and "Reorganised Index". But it failed and I am getting following error:-
 Â
Failed-1073548784) Executing the query "ALTER INDEX [CgiExclusion_ProfileId] ON [dbo].[CgiExclusion] REORGANIZE WITH ( LOB_COMPACTION = ON )" failed with the following error: "The index "CgiExclusion_ProfileId" (partition 1) on table "CgiExclusion" cannot be reorganized because page level locking is disabled.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.
I've got a fairly large hierarchy table and I'm trying to put together a query to find the lowest level descendants of the hierarchy. I think there must be some way to use the "Breadth-first" approach that's stated in the MSDN technet sites about SQL Server HierarchyID but i'm not sure how to write the necessary T-SQL to traverse that. I know I can get all the descendants of a parent node like this
SELECT *
FROM AdventureWorks2012.HumanResources.Employee
WHERE OrganizationNode.IsDescendantOf(@ParentNode) = 1
However, this query returns all levels for that parent's branch. If I just wanted list of employees that were at the lowest level of the branch(es) for this parent node, how would I do this?
I have a SP SPone. i have optimized that and kept it as SPone_Optimized. i would like to test the both SP's execution time to find out how best the optimized one fares.
i planned to test it as follows
declare @starttime datetime,@endtime datetime
declare @count int=0
select @starttime=getdate()
while(@i<10000)
begin
execute SPone_optimized @param='value1'
end
select @endtime=getdate()
select datediff(ms,@stattime,@endtime) 'total_exec_time'
----- for the SP that is before optimize
declare @starttime datetime,@endtime datetime
declare @count int=0
select @starttime=getdate()
while(@i<10000)
begin
execute SPone @param='value1'
end
select @endtime=getdate()
select datediff(ms,@stattime,@endtime) 'total_exec_time'
Is there anyway to force sql server to use the same execution plan?
One of the sp for web page takes about 2 minutes to execute. Once it's executed through query analyser, it takes relatively less time.
Is there any explanation for this?
I want to find out more information about the execution plan. I saw Parallelism (Gather Streams) in the excution plan. In what situation we can see this icon?If in case if we need to avoid how can we avoid this?
View 5 Replies View Related