Function Vs Temp Table Calcs Performance

Feb 11, 2004

I need to know what is the best performance for needing to do calculations for a particular column. I want to do something like:


Select IID
, ItemNo
, StdRun
, ActRun
, dbo.fnCalc(OutCount)
From myTable


The function is basically a set of Case Statements and various calculations dependant upon the Case.

Is this the best (performance wise) way to do it or should I dump the needed info in a Temp Table and do the calcs on it and then tie the select statement to the table.

I've seen both approaches done, but they both seem to be a different way of getting to the same conclusion. I'm just wondering which puts the lightest load on the server.

Thanks,
Tim

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Temp Table Vs. Union: Which Has Better Performance?

Aug 13, 2007

Right now, a client of mine has a T-SQL statement that does thefollowing:1) Create a temp table.2) Populate temp table with data from one table using an INSERTstatement.3) Populate temp table with data from another table using an INSERTstatement.4) SELECT from temp table.Would it be more efficient to simply SELECT from table1 then UNIONtable 2? The simply wants to see the result set and does not need tore-SELECT from the temp table.

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Difference In Performance Between Temp-table And Local-table?

Jan 23, 2008

Hi!

What is the difference in performance if I use a Temp-table or a local-table variable in a storedprocedure?

Why?


//Daniel

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Function To Check The Existence Of A Temp Table

Jun 13, 2006

This function, F_TEMP_TABLE_EXISTS, checks for the existence of a temp table (## name or # name), and returns a 1 if it exists, and returns a 0 if it doesn't exist.

The script creates the function and tests it. The expected test results are also included.

This was tested with SQL 2000 only.



if objectproperty(object_id('dbo.F_TEMP_TABLE_EXISTS'),'IsScalarFunction') = 1
begin drop function dbo.F_TEMP_TABLE_EXISTS end
go
create function dbo.F_TEMP_TABLE_EXISTS
( @temp_table_name sysname )
returns int
as
/*
Function: F_TEMP_TABLE_EXISTS

Checks for the existence of a temp table
(## name or # name), and returns a 1 if
it exists, and returns a 0 if it doesn't exist.

*/
begin

if exists (
select *
from
tempdb.dbo.sysobjects o
where
o.xtype in ('U')and
o.id = object_id( N'tempdb..'+@temp_table_name )
)
begin return 1 end

return 0

end
go
print 'Create temp tables for testing'
create table #temp (x int)
go
create table ##temp2 (x int)
go
print 'Test if temp tables exist'

select
[Table Exists] = dbo.F_TEMP_TABLE_EXISTS ( NM ),
[Table Name] = NM
from
(
select nm = '#temp' union all
select nm = '##temp2' union all
select nm = '##temp' union all
select nm = '#temp2'
) a


print 'Check if table #temp exists'

if dbo.F_TEMP_TABLE_EXISTS ( '#temp' ) = 1
print '#temp exists'
else
print '#temp does not exist'


print 'Check if table ##temp4 exists'
if dbo.F_TEMP_TABLE_EXISTS ( '##temp4' ) = 1
print '##temp4 exists'
else
print '##temp4 does not exist'
go

-- Drop temp tables used for testing,
-- after using function F_TEMP_TABLE_EXISTS
-- to check if they exist.

if dbo.F_TEMP_TABLE_EXISTS ( '#temp' ) = 1
begin
print 'drop table #temp'
drop table #temp
end

if dbo.F_TEMP_TABLE_EXISTS ( '##temp2' ) = 1
begin
print 'drop table ##temp2'
drop table ##temp2
end


Test Results:

Create temp tables for testing
Test if temp tables exist
Table Exists Table Name
------------ ----------
1 #temp
1 ##temp2
0 ##temp
0 #temp2

(4 row(s) affected)

Check if table #temp exists
#temp exists
Check if table ##temp4 exists
##temp4 does not exist
drop table #temp
drop table ##temp2



CODO ERGO SUM

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Mar 31, 2008

I am using SQL2005 EE with SP1. The server OS is windows 2K3 sp2

I have a table-valued function (E.g. findAllCustomer(Name varchar(100), gender varchar(1)) to join some tables and find out the result set base the the input parameters.

I have created indexes for the related joinning tables.

I would like to check the performance of a table-valued function and optimize the indexing columns by the execution plan.

I found the graphic explanation only show 1 icon to represent the function performance. I cannot find any further detail of the function. (E.g. using which index in joinning)

If I change the function to stored procedure, I can know whether the T-SQL is using index seek or table scan. I also found the stored procedure version subtree cost is much grether that the table-valued function

I would like to know any configureation in management studio can give more inform for the function performance?

Thanks


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Jan 16, 2007

Hi,
I am trying to write a table-valued function in SQL Server 2005 (SP1) to return all active directory groups a user belongs too, using managed code (VB.NET).

Testing the code with a simple winform I get the list of groups in about 0.4 seconds. However the table-valued function takes upwards of 17 seconds to run! Is this normal for managed code in SQL Server?

Imports SystemImports System.TextImports System.DataImports System.Data.SqlClientImports System.Data.SqlTypesImports System.CollectionsImports System.DirectoryServicesImports Microsoft.SqlServer.ServerPartial Public Class UserDefinedFunctions#Region "Constants" ''' <summary> ''' The connection string for Active Directory. ''' </summary> 'Private Const LDAP_CONNECTION_STRING As String = "LDAP://<My LDAP connection string> ''' <summary> ''' The LDAP search filter need to find a user in Active Directory. ''' </summary> 'Private Const LDAP_SEARCH_FILTER_USER As String = "(&(objectclass=user)(objectcategory=person)(sAMAccountName={0}))"#End Region ''' <summary> ''' Gets all active directory groups for the user. ''' </summary> ''' <returns>All dataset permissions for the user.</returns> <Microsoft.SqlServer.Server.SqlFunction(DataAccess:=DataAccessKind.None, FillRowMethodName:="udfUserActiveDirectoryGroupsFill", TableDefinition:="GroupID NVARCHAR(100)")> _ Public Shared Function udfUserActiveDirectoryGroups(ByVal userName As String) As IEnumerable ' Setup the active directory search. Dim searcher As New DirectorySearcher(LDAP_CONNECTION_STRING) searcher.Filter = String.Format(LDAP_SEARCH_FILTER_USER, userName) searcher.SearchScope = SearchScope.Subtree searcher.PropertiesToLoad.Add("distinguishedname") ' Run the active directory search. Dim result As SearchResult = searcher.FindOne() Dim userEntry As DirectoryEntry = result.GetDirectoryEntry() Dim userGroups As New ArrayList GetActiveDirectoryGroupsForEntry(userEntry, userGroups) Return userGroups End Function Public Shared Sub udfUserActiveDirectoryGroupsFill(ByVal source As Object, ByRef GroupID As SqlChars) GroupID = New SqlChars(CType(source, String)) End Sub ''' <summary> ''' Recursively gets the active directory groups for the directory entry. ''' </summary> ''' <param name="entry">The active directory entry.</param> ''' <param name="groups">The list of groups.</param> Private Shared Sub GetActiveDirectoryGroupsForEntry(ByVal entry As DirectoryEntry, ByVal groups As ArrayList) For i As Integer = 0 To entry.Properties("memberOf").Count - 1 Dim memberEntry As New DirectoryEntry("LDAP://" + entry.Properties("memberOf")(i).ToString()) groups.Add(memberEntry.Properties("sAMAccountName")(0).ToString()) GetActiveDirectoryGroupsForEntry(memberEntry, groups) Next End SubEnd Class

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Below are my temp tables

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SELECT data.*
INTO #Base_Resource
FROM (
SELECT '11A','Samsung' UNION ALL

[Code] ....

I want to loop through the data from #Base_Resource and do the follwing logic.

1. get the Resourcekey from #Base_Resource and insert into #Resource table

2. Get the SCOPE_IDENTITY(),value and insert into to

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I am able to do this using while loop. Is there any way to avoid the while loop to make this work?

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Apr 21, 2008



Hi There,

I am trying to create a report that sums up new cases weekly based on the previous 5 months. I have included some sample data below. The only field that displays a date is called monthSubmitted, varchar 7 and not very useful. How can I first convert this firld to a date ddmmyy?

How would you the code it so the user can run the report on demand at any given time and display the data for the last 5 months on a weekly basis? I am not sure as to how the date calculations should be coded.










12-Jan
19-Jan
26-Jan
2-Feb
9-Feb
16-Feb
23-Feb

MSS








New Cases Received
85
84
79
98
79
95
65

S1
30
32
27
40
42
38
29







S2
47
34
37
23
23
37
32

S3
3
7
-
17
4
1
9



Thanks,
Rhonda

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Mar 17, 2001

I have been researching some performance problems in a very large
application and I have a couple of questions about temp tables. (SQL 7.0
SP2)

I have one large procedure that I have been using as a test case.
Originally this procedure was a cursor with lots of processing steps
involving writing to, reading from and deleting in temp tables inside the
cursor. I remember reading that temp tables inside a cursor were a
potential performance problem, so I rewrote the procedure, replacing the
cursor with a While Loop.

Doing this showed no increase in performance. Since Profiler was showing .5
second duration times on statements in the procedure accessing the temp
tables I tested some more. I moved all the create statements to the top of
the procedure, as I know these statements after processing steps can cause
recompiles to happen. Still no performance increase.

Finally I replaced all the temp tables with actual tables, just to see what
would happen. With no other changes the performance increased by more than
500%.

Can someone give me some clues as to what is happening here, because if this
is a symptom of something I don't understand, the potential performance
problems from other places where temp tables are similarly used in the
application are enormous.

Thanks.

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May 4, 2006

I am writing a set of functions and then a stored procedure to allow me to view some data in Reporting Services. I have written the first part of the function as shown ;

set ANSI_NULLS ON

set QUOTED_IDENTIFIER ON

GO

ALTER FUNCTION [dbo].[fnWTRTerrierData]

(@vch_site_ref nvarchar (3), @dt_src_date datetime)

RETURNS @WeeklyTerrierRSPI TABLE



(Areacode varchar(2),siteref nvarchar(3),

estatename nvarchar(100), Securitised nvarchar(255),

unitref nvarchar(15), unittype nvarchar(30),

unittype_count int, tenantname nvarchar(100),

tenantstatus nvarchar(25), tenantstatus_count int,

unitstatus nvarchar(15), unitstatus_count int,

floortotal float, floortotocc float,

initialvacarea float, initialvacnet float,

TotalRent float, NetRent float,

FinalRtLsincSC float, DiscEndDate datetime,

ErvTot float, Leaseterm int,

leasestart datetime, rentreview nvarchar(255),

leaseend datetime, breakclause datetime,

tenancyterm datetime, landact nvarchar(255),

datadate datetime)

AS

BEGIN

INSERT @WeeklyTerrierRSPI



SELECT Areacode, siteref, estatename, Securitised, unitref, unittype, unittype_count, tenantname,

tenantstatus, tenantstatus_count, unitstatus, unitstatus_count, floortotal, floortotocc,

initialvacarea, initialvacnet, TotalRent, NetRent, FinalRtLsincSC, DiscEndDate, ErvTot,

Leaseterm, leasestart, rentreview, leaseend, breakclause, tenancyterm, landact, datadate

FROM dbo.src_terrier

WHERE (datadate = @dt_src_date) AND (siteref = @vch_site_ref)



RETURN

END

I have then written a stored procedure which picks up the result set from the function and ultimately will deliver it to Reporting Services. The problem I have is that as soon as I run the CREATE PROCEDURE script, I get an error saying ;

Msg 216, Level 16, State 1, Procedure spWTRWeeklyTerrierData, Line 16

Parameters were not supplied for the function 'fnWTRTerrierData'.

How can I add parameters to the function sufficently so that I can run the Create procedure element of my code?

Regards

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I think this is a very simple question, however, I don't know the
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time someone accesses the sp, though, because some of the
same info may need to be inserted and I don't want any PK errors.

thanks!!
Toni Eibner

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Oct 27, 2005

can anyone explain to me why the code excerpt 1 performs 60 reads on my DB, and code excerpt 2 performs 140000 ?


I know that specifically the statements are doing different things but they are both inserting into tables based on input parameters.

All relevant fields are indexed so I wouldn't have thought this was the issue?

Does the number of joins really make such a difference to performance?


code excerpt 1 (60 reads)
INSERT INTO @table_var
SELECT dbo.Organisation.OrganisationName,
dbo.Organisation.DepartmentName,
dbo.Address.BuildingNumber,
dbo.BuildingName.BuildingName,
dbo.SubBuildingName.SubBuildingName,
Thoroughfare_1.ThoroughfareName AS DependentThoroughfareName,
ThoroughfareDescriptor_1.ThoroughfareDescriptor AS DependentThoroughfareDescriptor,
dbo.Thoroughfare.ThoroughfareName,
dbo.ThoroughfareDescriptor.ThoroughfareDescriptor,
dbo.Locality.DoubleDependentLocality,
dbo.Locality.DependentLocality,
dbo.Locality.PostTown,
dbo.Address.Outcode,
dbo.Address.Incode,
dbo.Address.ConcatenationIndicator
FROM dbo.Address INNER JOIN
dbo.BuildingName ON dbo.Address.BuildingNameKey = dbo.BuildingName.BuildingNameKey INNER JOIN
dbo.Locality ON dbo.Address.LocalityKey = dbo.Locality.LocalityKey INNER JOIN
dbo.Organisation ON dbo.Address.OrganisationKey = dbo.Organisation.OrganisationKey AND
dbo.Address.PostcodeType = dbo.Organisation.PostcodeType INNER JOIN
dbo.SubBuildingName ON dbo.Address.SubBuildingNameKey = dbo.SubBuildingName.SubBuildingNameKey INNER JOIN
dbo.Thoroughfare ON dbo.Address.ThoroughfareKey = dbo.Thoroughfare.ThoroughfareKey INNER JOIN
dbo.ThoroughfareDescriptor ON dbo.Address.ThoroughfareDescriptorKey = dbo.ThoroughfareDescriptor.ThoroughfareDescriptorK ey INNER JOIN
dbo.Thoroughfare Thoroughfare_1 ON dbo.Address.DependentThoroughfareKey = Thoroughfare_1.ThoroughfareKey INNER JOIN
dbo.ThoroughfareDescriptor ThoroughfareDescriptor_1 ON
dbo.Address.DependentThoroughfareDescriptorKey = ThoroughfareDescriptor_1.ThoroughfareDescriptorKey
WHERE (dbo.Address.AddressKey = @addresskey) AND
(dbo.Address.OrganisationKey = @organisationkey) AND
(dbo.Address.PostcodeType = @postcodetype)




code excerpt 2:


INSERT INTO @table_var_out
SELECT dbo.Organisation.OrganisationName, dbo.Address.OrganisationKey, dbo.Address.AddressKey, dbo.Address.PostcodeType
FROM dbo.Address INNER JOIN
dbo.Organisation ON dbo.Address.OrganisationKey = dbo.Organisation.OrganisationKey AND
dbo.Address.PostcodeType = dbo.Organisation.PostcodeType
WHERE (dbo.Address.Outcode = @outcode) AND (dbo.Address.Incode = @incode)

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hi all,

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does anyone know why same sql would produce different query plans performance? how do i can to let the function as fast as the batch?

thanks!

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--create the procedure and insert into the temp table without creating it.
--no compilation error.
CREATE PROC testTemp
AS
BEGIN
INSERT INTO #tmp(dt)
SELECT GETDATE()
END

only on calling the proc does this give an execution error

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Jul 19, 2012

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    select * from @tTable

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But when trying to get this same result in a PP table I get an error, idem when replacing table variable by a temporary table.

Message: OLE DB or ODBC error. .... The current operation was cancelled because another operation the the transaction failed.

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Jul 20, 2005

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Sep 23, 2015

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Example of the script is below: in the source project I added columns [MyColumn_LINE_1]  and [MyColumn_LINE_5].

Is there any way I can make it generating an alter statement instead?

BEGIN TRANSACTION;
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
SET XACT_ABORT ON;
CREATE TABLE [dbo].[tmp_ms_xx_MyTable] (
[MyColumn_TYPE_CODE] CHAR (3) NOT NULL,

[Code] ....

The same script is generated regardless the table having data or not, having a clustered or nonclustered PK.

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  Date datetime,
  CID varchar(50),
  Segments int,
  Air_Date datetime,

[code]....

Getting Error

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Jun 6, 2005

Hello,

I am receiving the following error:

Column name or number of supplied values does not match table definition

I am trying to insert values into a temp table, using values from the table I copied the structure from, like this:

SELECT TOP 1 * INTO #tbl_User_Temp FROM tbl_User
TRUNCATE TABLE #tbl_User_Temp

INSERT INTO #tbl_User_Temp EXECUTE UserPersist_GetUserByCriteria @Gender = 'Male', @Culture = 'en-GB'

The SP UserPersist_GetByCriteria does a
"SELECT * FROM tbl_User WHERE gender = @Gender AND culture = @Culture",
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The error is being reported as coming from UserPersist_GetByCriteria on the "SELECT * FROM tbl_User" line.

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Greg.

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Aug 14, 2015

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CREATE TABLE #revf (
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[Code] ....

Now in a next step I am deleting the records from #revf table. Please see the delete code below

DELETE
FROM #revf
WHERE fi_gnmaid IN (
SELECT DISTINCT r2.fi_gnmaid
FROM #revf r1, #revf r2

[Code] ...

I don't want to create this #rev table so that i can avoid the delete statement. But data should not affect. Can i rewrite the above as below:

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[Code] ....

If my above statement is wrong . Where i can improve here? And actually i am getting 4 rows difference.

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Hello

Is it possible to insert data into a temp table with data returned from a stored procedure joined with data from another table?

insert #MyTempTable

exec [dbo].[MyStoredProcedure] @Par1, @Par2, @Par3

JOIN dbo.OtherTable...

I'm missing something before the JOIN command. The temp table needs to know which fields need be updated.

I just can't figure it out

Many Thanks!

Worf

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Oct 18, 2007

Hi,

I've tried the following query in SQL SERVER 2005, SQL Express and MACCESS.

select * from Table1 where drid in (SELECT DrID FROM Table2 WHERE (substring(PostalCode,1,3) IN ('B0E','B1P','B2H','B2Y','B3A','B3M','B4A','B4H','E1A','E1C','E1N','G0A', …)) and (substring(Telephone,1,3) IN ('204','250','306','403','416','418','450','506','514','519','604','613','705','780','807','819','902','905')))

The query is using two table. The first one Table1 is a table with user info. The second table Table2 has the info concerning a survey.

The Table1 containt approx. 6000 row and Table2 containt only 210 rows

The table structure from the different environment(MACCESS, SQL SERVER 2005, Sql Server Express 2005) are the same. The Table1 containt the field "PostalCode" and "Telephone".

When I execute this query on MACCESS and in SQL Server 2005 the result are approximately the same(Less than half second). But there a performance issue in Sql Express 2005. The query take an execution time between 7 and 9 secondes.

When I add a condition using a field from tblResponsePQ2Part1 ex: QA=1
like in the following query :
select * from Table1 where drid in (SELECT DrID FROM Table2
WHERE (QA = 1 substring(PostalCode,1,3) IN ('B0E','B1P','B2H','B2Y','B3A','B3M','B4A','B4H','E1A','E1C','E1N','G0A', …)) and (substring(Telephone,1,3) IN ('204','250','306','403','416','418','450','506','514','519','604','613','705','780','807','819','902','905')))
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This issue only happen in Sql Server Express, on the others cases(mean MSAccess, Sql Server) the execution time is less than half second.

It’s weird because, Sql Express 2005 is supposed to be more performant
than MACCESS, and have the same performance than Sql Server Professional Edition. Please Help Me!!!!


Anyone have an idea why?



Mathieu Desbiens

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Performance, User Defined Function Or Sub Query

Mar 11, 2008

What is better for performance, using a user defined function or a sub query to perform an aggregate calculation in a select statement. for eg would it be best to call a user defined function which performs the below calculation of the sub query shown. I'm speaking purely from a performance point of view.


SELECT o.ordersid,


o.orders,

(SELECT SUM(i.total) FROM items AS i WHERE i.ordersid = o.ordersid) AS [total]

FROM order AS o

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Is A Temp Table Or A Table Variable Used In UDF's Returning A Table?

Sep 17, 2007

In a table-valued UDF, does the UDF use a table variable or a temp table to form the resultset returned?
 

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Copying Temp Table Data To Permanent Table

Nov 23, 2007

Hello guys..

Can u plz help me by giving me an idea how i can copy the temp table data to permanent table

Thanks,
sohails

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Transact SQL :: Insert Data From Temp Table To Other Table

Oct 5, 2015

I want to insert the data from temp table to other table. Only condition is, it needs to sorted based on tool number and tool date. For example if we have ten records for tool number 1000, it should be order by tool number and then based on tool_dt. Both tables doesn't have any primary keys. Please find below my code. I removed all the unnecessary columns for simple understanding. INSERT INTO tool_summary  (tool_nbr, tool_dt) select tool_nbr, tool_dt from #tool order by tool_nbr, tool_dt...But this query is not working as expected. Data is getting shuffled.

Actual Data
Expected Result

1000
1-Aug
1000
1-Feb
1000
1-Jul
1000

[code]....

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Rename Table After Loading Data Into Temp Table

Dec 19, 2007

WE have a job that loads data from an Oralce DB into our SQL Server 2000 DB twice a day. The schedule has just changed so that now there is a possibility of having my west coast users impacted when it runs at 5 PM PST and my east coast users impacted when it runs at 7 AM EST. As a workaround, I have developed a DTS package that loads the data into temp tables instead of the real tables. IE. Oracle -> XTable_temp instead of Oracle -> XTable. The load sometimes takes about an hour to an hour and a half to load, so this solution works great, but I want to then lock the table, delete it and rename the temp table to table X. The pseudo code would be:

Begin Transaction


Lock Table XTable

Drop XTable

Alter Table XTable_temp rename to XTable

Release Lock XTable

End Transaction

Create XTable_temp

I see two issues with this solution. 1) I think if I can lock XTable that the lock would be released when the table is dropped and the XTable_temp was being renamed. 2) I can't find a command to rename a table.

Any ideas on a process that might help?


TIA,

A

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Trigger- Dump 'inserted' Table To Temp Table

Jul 11, 2006

I want to pass the 'inserted' table from a trigger into an SP, I think I need to do this by dumping inserted table into a temporary table and passing the temp table. However, I need to do this for many tables, and don't want to list all the column names for each table/trigger (maintenance nightmare).

Can I dump the 'inserted' table to a temp table WITHOUT specifying the column names?

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In-Line Table-Valued Function: How To Get The Result Out From The Function?

Dec 9, 2007

Hi all,

I executed the following sql script successfuuly:

shcInLineTableFN.sql:

USE pubs

GO

CREATE FUNCTION dbo.AuthorsForState(@cState char(2))

RETURNS TABLE

AS

RETURN (SELECT * FROM Authors WHERE state = @cState)

GO

And the "dbo.AuthorsForState" is in the Table-valued Functions, Programmabilty, pubs Database.

I tried to get the result out of the "dbo.AuthorsForState" by executing the following sql script:

shcInlineTableFNresult.sql:

USE pubs

GO

SELECT * FROM shcInLineTableFN

GO


I got the following error message:

Msg 208, Level 16, State 1, Line 1

Invalid object name 'shcInLineTableFN'.


Please help and advise me how to fix the syntax

"SELECT * FROM shcInLineTableFN"
and get the right table shown in the output.

Thanks in advance,
Scott Chang

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Query Using Mathematical Function Of Values From 2 Tables Has A Performance Problem

Aug 2, 2007

When I am executing a query that uses a mathematical function on values from 2 tables the query takes much longer than the same query that uses values from 1 table, even though the join remains the same.

Why is this happening?
Is there a way to bypass this problem?

Long query ( values from 2 tables ) :
SELECT
MAX ( ( SIGN ( attribute.keyValue- ( -2027587559 ) ) *SIGN ( attribute.keyValue- ( -2027587559 ) ) -1 ) *-1*data.val ) AS maxVal
FROM
DATA data,
ATTR attribute,
TREE_ELEMENT elm,
TREE_ELEMENT subject
WHERE
data.elmId=elm.id
AND attribute.keyValue IN ( 345647222,1569153803,1569146115,-2027587559 )
AND subject.id=elm.subjectId
AND subject.name = ‘test’


Short query ( values from 1 table ) :
SELECT
MAX ( ( SIGN ( data.keyValue- ( -2027587559 ) ) *SIGN ( data.keyValue- ( -2027587559 ) ) -1 ) *-1*data.val ) AS maxVal
FROM
DATA data,
ATTR attribute,
TREE_ELEMENT elm,
TREE_ELEMENT subject
WHERE
data.elmId=elm.id
AND attribute.keyValue IN ( 345647222,1569153803,1569146115,-2027587559 )
AND subject.id=elm.subjectId
AND subject.name = ‘test’


Long query execution plan:
Execution Tree
--------------
Stream Aggregate ( DEFINE: ( [Expr1004]=MAX ( ( sign ( [attribute].[keyValue]--2027587559 ) *sign ( [attribute].[keyValue]--2027587559 ) -1 ) * ( -1*[data].[val] ) ) ) )
|--Nested Loops ( Inner Join )
|--Hash Match ( Inner Join, HASH: ( [elm].[id] ) = ( [data].[elmId] ) , RESIDUAL: ( [data].[elmId]=[elm].[id] ) )
| |--Nested Loops ( Inner Join, OUTER REFERENCES: ( [subject].[id] ) )
| | |--Index Seek ( OBJECT: ( [TREE_ELEMENT].[TREE_ELEMENT_NAME_IDX] AS [subject] ) ,
SEEK: ( [subject].[name]=’test’ ) ORDERED FORWARD )
| | |--Index Seek ( OBJECT: ( [TREE_ELEMENT].[TREE_ELEMENT_APP_ID_IDX] AS [elm] ) ,
SEEK: ( [elm].[subjectId]=[subject].[id] ) ORDERED FORWARD )
| |--Clustered Index Scan ( OBJECT: ( [DATA].[PK__DATAS_SAMPL__485B9C89] AS [data] ) )
|--Table Spool
|--Index Seek ( OBJECT: ( [ATTR].[TREE_Z_IDX] AS [attribute] ) ,
SEEK: ( [attribute].[keyValue]=-2027587559 OR [attribute].[keyValue]=345647222 OR [attribute].[keyValue]=1569146115 OR [attribute].[keyValue]=1569153803 ) ORDERED FORWARD )



Short query execution plan:
Execution Tree
--------------
Stream Aggregate ( DEFINE: ( [Expr1004]=MAX ( [partialagg1005] ) ) )
|--Nested Loops ( Inner Join )
|--Stream Aggregate ( DEFINE: ( [partialagg1005]=MAX ( ( sign ( [data].[keyValue]--2027587559 ) *sign ( [data].[keyValue]--2027587559 ) -1 ) * ( -1*[data].[val] ) ) ) )
| |--Hash Match ( Inner Join, HASH: ( [elm].[id] ) = ( [data].[elmId] ) , RESIDUAL: ( [data].[elmId]=[elm].[id] ) )
| |--Nested Loops ( Inner Join, OUTER REFERENCES: ( [subject].[id] ) )
| | |--Index Seek ( OBJECT: ( [TREE_ELEMENT].[TREE_ELEMENT_NAME_IDX] AS [subject] ) ,
SEEK: ( [subject].[name]=’test’ ) ORDERED FORWARD )
| | |--Index Seek ( OBJECT: ( [TREE_ELEMENT].[TREE_ELEMENT_APP_ID_IDX] AS [elm] ) ,
SEEK: ( [elm].[subjectId]=[subject].[id] ) ORDERED FORWARD )
| |--Clustered Index Scan ( OBJECT: ( [DATA].[PK__DATAS_SAMPL__485B9C89] AS [data] ) )
|--Index Seek ( OBJECT: ( [ATTR].[TREE_Z_IDX] AS [attribute] ) ,
SEEK: ( [attribute].[keyValue]=-2027587559 OR [attribute].[keyValue]=345647222 OR [attribute].[keyValue]=1569146115 OR [attribute].[keyValue]=1569153803 ) ORDERED FORWARD )

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Global Temp Table Vs. Permanent Table Use

Dec 17, 2004

I need to decide what is better to use: global temp table ( I can't use local one) or permanent table in SQL 2000 stored procedures. I extract data from linked server table and update several tables on our server.
Those procedures scheduled to run every 3 hours.

Another question: for some reasons when I used global temp table, I wasn't able to schedule multi steps with every step executing one of the stored procedures.I think global temp tables should be visible to other stored procedures, right?

Your suggestions?

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