Optimization Of Query On Partitioned View
May 27, 2008
Schema below.
The execution plan shows that this query is correctly optimized to check only the underlying Employee_2008 table.
select * from Employee where ReportingYear = '2008'
This query is not optimized and checks both Employee_2008 and Employee_2007:
declare @ry varchar(4)
set @ry = '2008'
select * from Employee where ReportingYear = @ry
How can I get second query to be optimized correctly?
Schema:
CREATE TABLE [dbo].[Employee_2007](
[EmployeeID] [int] NOT NULL,
[Name] [varchar](50) NOT NULL
) ON [PRIMARY]
CREATE TABLE [dbo].[Employee_2008](
[EmployeeID] [int] NOT NULL,
[Name] [varchar](50) NOT NULL
) ON [PRIMARY]
CREATE VIEW [dbo].[Employee]
AS
SELECT
'2007' ReportingYear,
EmployeeID,
Name
FROM Employee_2007
UNION ALL
SELECT
'2008' ReportingYear,
EmployeeID,
Name
FROM Employee_2008
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Jul 20, 2005
Hello :-)My question is: If I query a partitioned view, but don't know the valuesin the "where x in(<expression>)" clause, i.e.: select * from viewAwhere intVal in(select intVal from tbl1) . Compared to: select * fromviewA where intVal in(5,6).Of course "intVal" is partitioning column.Will this result in an optimized query that searches only the relevanttables?*** Sent via Developersdex http://www.developersdex.com ***Don't just participate in USENET...get rewarded for it!
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Nov 2, 2007
We have a situation where queries against a partitioned view ignore a suitable index and perform a table scan (against 200+MB of data), where the same query on the underlying table(s) results in a 4 page index seek. I can€™t find any mention of the situation, so I€™m trying a post here.
We€™re running SQL Server 2005 Enterprise edition sp2 on Windows 2003 Enterprise Edition sp1 on a two node cluster, and it also occurs on a stand-alone development box with Developer edition. We have four tables, named Options#0, Options#1, Options#2, and Options#3. All are almost identical (script generated by SSMS and edited down a bit):
SET ANSI_NULLS OFF
SET QUOTED_IDENTIFIER ON
CREATE TABLE [dbo].[Options#0](
[ControlID] [tinyint] NOT NULL CONSTRAINT [DF_Options#0__ControlID] DEFAULT ((0)),
[ModelCode] [char](8) NOT NULL,
[EquipmentID] [int] NOT NULL,
[AdjustmentContextID] [int] NOT NULL,
[EquipmentCode] [char](2) NOT NULL,
[EquipmentTypeCode] [char](1) NOT NULL,
[Description] [varchar](50) NOT NULL,
[DisplayOrder] [smallint] NOT NULL,
[IsStandard] [bit] NOT NULL,
[Priority] [tinyint] NOT NULL,
[Status] [bit] NOT NULL,
[Adjustment] [int] NOT NULL,
CONSTRAINT [PK_Options#0] PRIMARY KEY CLUSTERED
(
[ModelCode] ASC,
[EquipmentID] ASC,
[AdjustmentContextID] ASC,
[ControlID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
ALTER TABLE [dbo].[Options#0] WITH CHECK ADD CONSTRAINT [CK_Options#0__ControlID] CHECK (([ControlID]=(0)))
ALTER TABLE [dbo].[Options#0] CHECK CONSTRAINT [CK_Options#0__ControlID]
The only differences between the tables are in the names and in the value defaulted to and CHECKed, which matches the table name (to support the partitioned view, of course).
We receive and load data ever week and every two month, and use an unlikely algorithm to load and manage its availability by running an ATLER on the view (to maintain the access rights defined for the hosting environment). Scripted out via SSMS, the view looks like:
SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
CREATE VIEW [dbo].[Options] AS select * from Options#1 union all select * from Options#3
The problem is that when we issue a query like
SELECT count(*)
from Options
where ControlID = 1
and ModelCode = '2004NIC9'
The resulting query (as checked via the query plan and SET STATISTICS IO on) will get €œpartitioned€?, running against the proper table, but it will ignore the query, perform a table scan, and churn through 200+MB of data. A Similar query run against the underlying table
SELECT count(*)
from Options#1
where ControlID = 1
and ModelCode = '2004NIC9'
(with or without the ControlID = 1 clause) will perform a Clustered Index Seek and read maybe 4 pages.
Analyzing the execution plan shows that the table query work like you€™d think, but for the query against the view we get a Clustered Index Scan, with predicate:
[DBName].[dbo].[Options#1].[ControlID]=(1) AND CONVERT_IMPLICIT(char(8),[ DBName].[dbo].[Options#1].[ModelCode],0)=€™2004NIC9€™
I get the same results when explicitly listing all columns in the view. The code page on the view and tables is the same (as determined by checking properties via SSMS).
Why is the table data column being implicitly converted to the data type that it already is? Why does this occur when working with the partitioned view but not with the actual table? Can this behavior be controlled or modified without losing the (incredibly useful) data loading management benefits of the partitioned view? I€™m guessing (and hoping) it€™s some subtle quirk or mis-setting, please set me on the right path!
Philip Kelley
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Jun 19, 2001
I have a partitioned view containing 4 tables (example follows at end)
The query plan generated on a select correctly accesses just one of the tables
The query plan generated on an update always accesses all four of the tables. I thought that it should only access the partition required to satisfy the update. Can anyone please advise whether:
a) Is this is expected behaviour?
b) Is the partitioned view incorrectly configured in some way?
c) Is there is a known bug in this area
Note that the behaviour is the same with SP1 on SQL2000
I would be very grateful for any advice
Thanks
Stefan Bennett
Example follows
--Create the tables and insert the values
CREATE TABLE Sales_West (
Ordernum INT,
total money,
region char(5) check (region = 'West'),
primary key (Ordernum, region)
)
CREATE TABLE Sales_North (
Ordernum INT,
total money,
region char(5) check (region = 'North'),
primary key (Ordernum,region)
)
CREATE TABLE Sales_East (
Ordernum INT,
total money,
region char(5) check (region = 'East'),
primary key (Ordernum,region)
)
CREATE TABLE Sales_South (
Ordernum INT,
total money,
region char(5) check (region = 'South'),
primary key (Ordernum,region)
)
GO
INSERT Sales_West VALUES (16544, 2465, 'West')
INSERT Sales_West VALUES (32123, 4309, 'West')
INSERT Sales_North VALUES (16544, 3229, 'North')
INSERT Sales_North VALUES (26544, 4000, 'North')
INSERT Sales_East VALUES ( 22222, 43332, 'East')
INSERT Sales_East VALUES ( 77777, 10301, 'East')
INSERT Sales_South VALUES (23456, 4320, 'South')
INSERT Sales_South VALUES (16544, 9999, 'South')
GO
--create the view that combines all sales tables
CREATE VIEW Sales_National
AS
SELECT *
FROM Sales_West
UNION ALL
SELECT *
FROM Sales_North
UNION ALL
SELECT *
FROM Sales_East
UNION ALL
SELECT *
FROM Sales_South
GO
--Look at execution plan for this query
-- This correctly only accesses the South partition
SELECT *
FROM sales_national
WHERE region = 'south'
-- Look at execution plan for update
-- This accesses all partitions - Why?
update sales_national
set total = 100
where ordernum = 23456;
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Mar 23, 2006
I'm have made a series of tables and views to create some reports. I have included boiled-down versions of them below. The report query that I want to run (at the bottom) takes a long time to execute and sometimes times out. Creating a rank within the query is doing the most damage, but it can still take a long time to execute without it. The usage table has almost 70k records and there are over 10k users. Does anyone have suggestions for making these views/queries more efficient?
==========================
TABLE TGroupAudit
AuditID, intOldGroupID, intNewGroupID, strUserID, dtJoinDate
==========================
TABLE people
strUserID, name
==========================
TABLE usage
UsageID, strUserID, cost, seconds, gmttime, accesstype
==========================
CREATE VIEW VUsageSubtotals AS
SELECT TOP 100 PERCENT VUserGroupDates.strUserID, people.name, VUserGroupDates.intGroupID, usage.accesstype, SUM(usage.cost) AS subtotal, MONTH(usage.gmttime) AS [month], VUsageTotals.total
FROM VUserGroupDates INNER JOIN
people ON VUserGroupDates.strUserID = people.strUserID INNER JOIN
usage ON people.strUserID = usage.strUserID INNER JOIN
VUsageTotals ON VUserGroupDates.strUserID = VUsageTotals.strUserID AND
VUserGroupDates.intGroupID = VUsageTotals.intGroupID AND MONTH(usage.gmttime) = VUsageTotals.[month]
WHERE (usage.gmttime BETWEEN VUserGroupDates.dtJoinDate AND VUserGroupDates.dtLeaveDate)
GROUP BY VUserGroupDates.strUserID, VUserGroupDates.intGroupID, usage.accesstype, MONTH(usage.gmttime), VUsageTotals.total
==========================
CREATE VIEW VUsageTotals AS
SELECT VUserGroupDates.strUserID, people.name, VUserGroupDates.intGroupID, SUM(usage.seconds) AS totaltime, SUM(usage.cost) AS totalcost, MONTH(usage.gmttime) AS [month]
FROM VUserGroupDates INNER JOIN
people ON VUserGroupDates.strUserID = people.strUserID INNER JOIN
usage ON people.strUserID = usage.userid
WHERE (usage.gmttime BETWEEN VUserGroupDates.dtJoinDate AND VUserGroupDates.dtLeaveDate)
GROUP BY VUserGroupDates.strUserID, people.name, VUserGroupDates.intGroupID, MONTH(usage.gmttime)
==========================
CREATE VIEW VUserGroupDates AS
SELECT strUserID, intNewGroupID AS intGroupID, dtJoinDate,
ISNULL ((SELECT MAX(TGA2.dtJoinDate) FROM TGroupAudit TGA2
WHERE TGA2.dtJoinDate < TGA1.dtJoinDate AND TGA2.strUserID = TGA1.strUserID), GETDATE()) AS dtLeaveDate
FROM TGroupAudit TGA1
==========================
Here's a sample query that gets run for a report:
SELECT TOP 30 PERCENT WITH TIES V1.*,
(SELECT COUNT(DISTINCT V2.subtotal)
FROM VUsageSubtotals V2 WHERE V1.subtotal <= V2.subtotal
AND V1.intGroupID = V2.intGroupID
AND V2.month = 3) AS rank
FROM VUsageSubtotals V1
WHERE strUserID IN ('a1, a2, b5, b7, b9, d12')
AND V1.month = 3
AND accesstype = 'STANDARD'
GROUP BY strUserID, intGroupID, subtotal, month, total, accesstype
The purpose of the report is an accounting one. It is desired to know how much each user used each accesstype during a month. Usage is further split up by the user's groups (which may never change or could several times during a month) for billing purposes.
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Apr 5, 2006
I am having the following situation - there is a view that aggregates and computes some values and a table that I need the details from so I join them filtering on the primary key of the table. The execution plan shows that the view is executed without any filtering so it returns 140 000 rows which are later filtered by the join operation a hash table match. This hash table match takes 47% of the query cost. I tried selecting the same view but directly giving a where clause without the join €“ it gave a completely different execution plan. Using the second method is in at least 4 folds faster and is going only through Index Seeks and nested loops.
So I tried modifying the query with third version. It gave almost the same execution plan as the version 1 with the join operation.
It seams that by giving the where clause directly the execution plan chosen by the query optimizer is completely different €“ it filters the view and the results from it and returns it at the same time, in contrast to the first version where the view is executed and return and later filtered. Is it possible to change the query some how so that it filters the view before been joined to the table.
Any suggestions will be appreciated greatly
Stoil Pankov
"vHCItemLimitUsed" - this is the view
"tHCContractInsured" - this is the table
"ixHCContractInsuredID" - is the primary key of the table
Here is a simple representation of the effect:
Version 1:
select *
from dbo.vHCItemLimitUsed
inner join tHCContractInsured on
vHCItemLimitUsed.ixHCContractInsuredID = tHCContractInsured.ixHCContractInsuredID
where tHCContractInsured.ixHCContractInsuredID in (9012,9013,9014,9015)
Version 2:
select *
from vHCItemLimitUsed
where ixHCContractInsuredID in (9012,9013,9014,9015)
Version 3:
select *
from dbo.vHCItemLimitUsed
where ixHCContractInsuredID in
(select ixHCContractInsuredID
from tHCContractInsured
where ixHCContractInsuredID in (9012,9013,9014,9015))
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Dec 17, 2007
I want to find a way to get partition info for all the tables in all the databases for a server. Showing database name, table name, schema name, partition by (maybe; year, month, day, number, alpha), column used in partition, current active partition, last partition (for date partitions I want to know if the partition goes untill 2007, so I can add 2008)
all I've come up with so far is:
Code Block
SELECT distinct o.name From sys.partitions p
inner join sys.objects o on (o.object_id = p.object_id)
where o.type_desc = 'USER_TABLE'
and p.partition_number > 1
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Mar 6, 2006
Hi! This is my first post and I really need help with Partitioned View. I'm using Sql Server 2000 and I created a partitioned view using 6 tables and now a need to create the table '7' and alter the view. But when i'm trying to insert new data i'm receiving the message: :eek:
"Server: Msg 4416, Level 16, State 5, Line 1
UNION ALL view 'tb_sld_cob_pap' is not updatable because the definition
contains a disallowed construct."
My code is:
drop VIEW tb_sld_cob_pap
GO
CREATE TABLE dbo.tb_sld_cob_pap_7 (
cod_operacao int NOT NULL ,
cod_contrato int NOT NULL ,
sequencial_duplicata int NOT NULL ,
data_sld_pap smalldatetime NOT NULL CHECK ([data_sld_pap] >= '20060201'),
liqex_dia_nom_outros float NULL ,
liqex_dia_moe_outros float NULL,
constraint pk_pap7 primary key (cod_operacao,cod_contrato,sequencial_duplicata,da ta_sld_pap)
)
GO
CREATE INDEX IdxSldCobPap7_1 ON dbo.tb_sld_cob_pap_7(cod_titulo, seq_titulo, data_sld_pap)
GO
CREATE INDEX IdxSldCobPap7_2 ON dbo.tb_sld_cob_pap_7(cod_operacao, seq_ctr_sacado, sequencial_duplicata, data_sld_pap)
GO
ALTER TABLE dbo.tb_sld_cob_pap_6
DROP CONSTRAINT CK__tb_sld_co__data___6C190EBB
GO
ALTER TABLE dbo.tb_sld_cob_pap_6 ADD CONSTRAINT
CK__tb_sld_co__data___6C190EBB CHECK (((([data_sld_pap] >= '20051201') and ([data_sld_pap] < '20060201'))))
GO
create VIEW tb_sld_cob_pap
as
select * from tb_sld_cob_pap_1
union all
select * from tb_sld_cob_pap_2
union all
select * from tb_sld_cob_pap_3
union all
select * from tb_sld_cob_pap_4
union all
select * from tb_sld_cob_pap_5
union all
select * from tb_sld_cob_pap_6
union all
select * from tb_sld_cob_pap_7
My table tb_sld_cob_pap_6 does NOT have data with ([data_sld_pap] >= '20060201').
I'm using this script in other database and I don't have this problem.
Thank you...
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Jun 18, 2007
USE Northwind
GO
CREATE TABLE myTable99_1 (
Accountchar(3)
, Ledgerchar(4)
, PostDatedatetime
, PRIMARY KEY (Account, Ledger)
, CHECK(PostDate> '1/1/1999' and PostDate < '12/31/1999 23:59:59'))
CREATE TABLE myTable99_2 (
Accountchar(3)
, Ledgerchar(4)
, PostDatedatetime
, PRIMARY KEY (Account, Ledger)
, CHECK(PostDate> '1/1/2000' and PostDate < '12/31/2000 23:59:59'))
CREATE TABLE myTable99_3 (
Accountchar(3)
, Ledgerchar(4)
, PostDatedatetime
, PRIMARY KEY (Account, Ledger)
, CHECK(PostDate> '1/1/2001' and PostDate < '12/31/2001 23:59:59'))
CREATE INDEX myTable99_1_IX ON MyTable99_1
(Account, Ledger)
CREATE INDEX myTable99_2_IX ON MyTable99_2
(Account, Ledger)
CREATE INDEX myTable99_3_IX ON MyTable99_3
(Account, Ledger)
GO
CREATE VIEW myView99
AS
SELECT Account
, Ledger
, PostDate
FROM myTable99_1
UNION ALL
SELECT Account
, Ledger
, PostDate
FROM myTable99_2
UNION ALL
SELECT Account
, Ledger
, PostDate
FROM myTable99_3
GO
SELECT * FROM myView99 WHERE Account = 1 AND Ledger = 1
GO
DROP VIEW myView99
DROP TABLE myTable99_1, myTable99_2, myTable99_3
GO
OK, so I thought I knew this, but I'm looking for parallelism...not only am I no getting it, I'm getting an Index scan....is it becuse I didn't put any data in the table? I thought it would stil show my index seek with parallelism
What up, homey?
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Mar 7, 2012
This post concerns updating across a partitioned view, and not unlike others about this subject I am getting this error:
Msg 4436, Level 16, State 12, Line 1
UNION ALL view 'dbII.dbo.MyTable' is not updatable because a partitioning column was not found.
I am aware of the rules for defining a partitioning column, but interpreting them may have beaten me. So perhaps I haven't abided by all the rules. How to spot which one(s) from the view and table definitions? I suspect the CHECK constraint does not allow the ASCII function, but I can't see how to avoid using it given SYSCODE entries in one table are like "[A-Z]%" and in the other are like "[0-9]%".
Otherwise, I suspect it is because one of the tables has, by legacy, a text column and the view is casting it to varchar(MAX). I also suspect it is because there's a second column with a unique index. These aren't mentioned in the rules (are they?).
Here's the view definition:
SELECT SYSCODE, COL2, CAST(COMMENTS AS varchar(MAX)) AS COMMENTS
FROM dbo.MYTABLE
UNION ALL
SELECT SYSCODE, COL2, COMMENTS
FROM OTHERDATABASE.dbo.MYTABLE AS MYTABLE_1
And here are the table definitions:
-- Table in the database where view is defined
CREATE TABLE [dbo].[MYTABLE](
[SYSCODE] [char](12) NOT NULL,
[Code]....
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Oct 18, 2007
Hi all,
I am designing 3 p:artitioned views for 3 tables. Those tables grow up in 1.5 millions of rows per month (each one), so I decided to partition those tables monthly. The issue is that if I want to create the views with more than 256 months (256 tables) SQL Server says: 'Server: Msg 106, Level 15, State 1, Procedure Jugadas, Line 258Too many table names in the query. The maximum allowable is 256.'
Is there any workaround for this?
Another solution maybe?
PD1: I've tested with less than 256 tables and it works fine, I can update and query the tables (except for a couple of querys where I've got to join 2 or more of the involucred views in which case I got a similar error saying about a 260 table limit).
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Nov 13, 2007
I have a table that I'm trying to scale out into a partitioned view. It's about 30 million rows. It's a workflow table and I have a taskID in the table. Originally the table was partitioned on this column but performance still wasn't what I wanted it to be, so we figured out how we could partition on a bit flag of IsOpen.
Question #1) Anyone know a best practice for creating apartitioned views on multi-columns?
What I'd like to try to do to lower the complexity of the original partitioned view is to create a view of partitioned views. Is this even possible (This is Q#2, BTW).
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Jan 13, 2004
I have a partitioned view defined by a UNTION ALL of member tables. I can update the member tables through the view without any problem. However, when I declare a cursor on this partitioned view and try to update the view using WHERE CURRENT OF, I get an error saying 'The target object type is not updatable through a cursor'. Does anyone know if it's the case that updating a partitioned view through cursor is not supported in SQL Server 2000?
Thanks
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Sep 8, 2014
I have database with a large table (30 Billion rows) because it is so big I separated the data in quarterly tables and created a partitioned view (with hints for the date column) about 1 billions a quarter. (all in separated filegroups). The tables themselfes are partitioned by date again, so you slice out one day
However the full-backup of grows and grows and the mainpart of it is "old" but needed data.
So I was thinking to put the older data in a separate database (with separated backup) and then point to the table in my view.
While this is technical possible (leaving out the WITH SCHEMABINDING) I wonder what negative consequences it will have.
I already had to lose "with schemabing".
I have to use separate partioning functions - for each database its own - (partition schemas where already separated due to separated filegroups)
What about query optimization, does the optimizer care that there are two databases?
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Jan 23, 2008
Using SQL Server 2005. Defined partitioned view with computed column. Computed column was a constant varchar. Ran a SELECT. According to Query Execution Plan, SQL did recognize the computed column as the partitioning column and used it to optimize the query.
However MSDN says a computed column cannot be used as the partitioning column.
Could someone from MS clarify?
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May 14, 2006
Hello,
please enlighten me regarding an issue with partitioned view... There are 3 tables in my DB of a similar structure:
CREATE TABLE Table1 (value1 varchar(1))
CREATE TABLE Table2 (value1 varchar(1))
CREATE TABLE Table3 (value1 varchar(1))
INSERT INTO Table1 (value1)
SELECT 'a' UNION SELECT 'b' UNION SELECT 'c'
INSERT INTO Table2 (value1)
SELECT 'a' UNION SELECT 'b' UNION SELECT 'c'
INSERT INTO Table3 (value1)
SELECT 'a' UNION SELECT 'b' UNION SELECT 'c'
As sometimes we need to access all data from these tables, a view has been created:
CREATE VIEW AllData AS
SELECT value1, '1' as table_id from Table1
UNION ALL
SELECT value1, '2' as table_id from Table2
UNION ALL
SELECT value1, '3' as table_id from Table3
The problem is that while running a query like
SELECT * from AllData WHERE value1 = 'a' and table_id = '3'
I see a table scan being performed on all 3 tables, not just table3 - i.e optimisation engine doesn't care for my table_id computed column and for that fact that required data is located ONLY in Table3.
Is there any way to force optimiser to consider this column andrrebuild a plan? If not - how can I rebuild a view (I can't modify tables) to achieve that? Maybe create an index for a view?
Thanks in advance. RTFM and search don't seem to clarify this for me...
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Oct 5, 2007
I am setting up 3 Linked Servers (SERVER_A, SERVER_B and SERVER_C) in an isolated local network. They are all running SQL Server 2005 Developer Edition, all on XP SP2. On each server, I have a distributed partitioned view named WAREHOUSE_ALL that basically is the UNION of all WAREHOUSE tables.
I am having trouble in running write (INSERT, UPDATE or DELETE) queries on the distributed partitioned view. The error returned was (run from SERVER_B)
OLE DB provider "SQLNCLI" for linked server "SERVER_A" returned message "No transaction is active.". Msg 7391, Level 16, State 2, Line 7The operation could not be performed because OLE DB provider "SQLNCLI" for linked server "SERVER_A" was unable to begin a distributed transaction.
However, executing a read (SELECT) query ran smoothly without error.
I have done all the steps required as described in the article at http://support.microsoft.com/?kbid=873160 . Note that the only difference between the situation and our situation is the provider (SQLOLEDB and SQLNCLI), which I guess does not important. Unfortunately, the error still comes out.
After reading heaps of other article, I suspected that there is something wrong with MSDTC. As far as I know, all the settings for MSDTC were set accordingly. Then, I ran DTCPing - http://www.microsoft.com/downloads/details.aspx?FamilyID=5e325025-4dcd-4658-a549-1d549ac17644&DisplayLang=en and the error returned was
DTCping log file: C:Documents and SettingsAdministratorDesktoplSERVER_B2496RPC server is ready
Please Start Partner DTCping before pinging
++++++++++++Validating Remote Computer Name++++++++++++
Please refer to following log file for details:
C:Documents and SettingsAdministratorDesktoplSERVER_B2496.log
Invoking RPC method on SERVER_C
Problem:fail to invoke remote RPC method
Error(0x5) at dtcping.cpp @303
-->RPC pinging exception
-->5(Access is denied.)
RPC test failed
And here is the log file:
Platform:Windows XP
IP Configure Information
Host Name . . . . . . . . . : SERVER_B
DNS Servers . . . . . . . . : 129.78.99.2
Node Type . . . . . . . . . :
NetBIOS Scope ID. . . . . . :
IP Routing Enabled. . . . . : no
WINS Proxy Enabled. . . . . : no
NetBIOS Resolution Uses DNS : no
Ethernet adapter {4404F3CB-F4B7-4990-912C-E69721C885B1}:
Description . . . . . . . . : 3Com EtherLink XL 10/100 PCI TX NIC (3C905B-TX) #2 - Packet Scheduler Miniport
Physical Address. . . . . . : 00-01-02-85-B8-A9
DHCP Enabled. . . . . . . . : no
IP Address. . . . . . . . . : 172.19.102.35
Subnet Mask . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . : 172.19.102.250
DHCP Server . . . . . . . . : 255.255.255.255
Primary WINS Server . . . . : 0.0.0.0
Secondary WINS Server . . . : 0.0.0.0
Lease Obtained. . . . . . . : Thu Jan 01 00:00:00 1970
Lease Expires . . . . . . . : Thu Jan 01 00:00:00 1970
++++++++++++lmhosts.sam++++++++++++
++++++++++++hosts ++++++++++++
127.0.0.1 localhost
++++++++++++++++++++++++++++++++++++++++++++++
DTCping 1.9 Report for SERVER_B
++++++++++++++++++++++++++++++++++++++++++++++
RPC server is ready
++++++++++++Validating Remote Computer Name++++++++++++
10-05, 17:10:54.769-->Start DTC connection test
Name Resolution:
SERVER_C-->172.19.102.36-->SERVER_C
10-05, 17:11:09.781-->Start RPC test (SERVER_B-->SERVER_C)
Problem:fail to invoke remote RPC method
Error(0x5) at dtcping.cpp @303
-->RPC pinging exception
-->5(Access is denied.)
RPC test failed
I guess it could be due to port problem, which I have already opened in the Windows Firewall. There is one article which is confusing me -> Update to automatically open port 135 in Windows Firewall when a TCP or a UDP RPC server registers with the endpoint mapper at http://support.microsoft.com/kb/838191 (This article shows automatic opening of port 135!)
Please help me. Thanks.
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May 24, 2006
Greetings once again my SQL friends,
I am getting the following error when I attempt to complete my data flow task. The destination is a partitioned view but I get the following error message when I run the package :
Partitioned view 'PRICE_DIM' is not updatable as the target of a bulk operation
How to solve this problem?
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Dec 7, 2000
I have a problem while I try to insert data into a partioned view I am
getting the following error.
Server: Msg 4436, Level 16, State 12, Line 9
UNION ALL view 'sales_all' is not updatable because a partitioning column
was not found.
Any thoughts
USE pubs
CREATE TABLE sales_monthly
( sales_month int NOT NULL ,
sales_qty int NOT NULL
)
GO
CREATE TABLE sales_jan
( sales_month int NOT NULL,
sales_qty int NOT NULL
)
GO
CREATE TABLE sales_feb
( sales_month int NOT NULL,
sales_qty int NOT NULL
)
GO
ALTER TABLE sales_feb WITH NOCHECK ADD
CONSTRAINT PK_sales_feb PRIMARY KEY CLUSTERED
( sales_month
) ,
CONSTRAINT CK_sales_feb CHECK (sales_month = 2)
GO
ALTER TABLE sales_jan WITH NOCHECK ADD
CONSTRAINT PK_sales_jan PRIMARY KEY CLUSTERED
( sales_month
) ,
CONSTRAINT CK_sales_jan CHECK (sales_month = 1)
GO
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Jul 25, 2005
Hi,
While creating an indexed view with the command :
create unique clustered index idx_atrid on account_transactions (policy)
there is a check constraint on the policy column of the tables used in this view.
The following error is encountered
Cannot index the view 'test.dbo.account_transactions'. It contains one or more disallowed constructs.
Can anyone help?
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Jul 23, 2005
We have a partitioned view with 4 underlying tables. The view and eachof the underlying tables are in seperate databases on the same server.Inserts and deletes on the view work fine. We then add insert anddelete triggers to each of the underlying tables. The triggers modifya different set of tables in the same database as the view (differentthan the underlying table). The problem is those triggers aren't firedwhen inserting or deleteing via the view. Inserting or deleteing theunderlying table directly causes the the triggers to fire, but not whenthe tables are accessed as a result of using the view.Am I missing something? The triggers are 'for insert' and 'fordelete'. No 'instead of' or 'after' triggers.
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Jul 23, 2005
I just resolved a strange situation I was having with an ODBC linked SQL 7view in an Access 2000 MDB file, and I'm trying to get some understanding asto what happened.The linked view was scrolling very slowly in the MDB file; however, itscrolled very quickly when accessed through an ADP file. Theoretically,since it's a server-side object, it should appear the same in both files,but it didn't.Not knowing what was causing this, I tried various options. When I decidedto try encrypting the view, I first made a copy of it, and encrypted thecopy, and linked that copy to the MDB file. It scrolled without hanging asthe original one did.But, strangely enough: once I encrypted the copy of the view, the originalview also now scrolled quickly (about 5-10 times faster than it had been). Ieven deleted the encrypted copy, and the original view still scrolled veryquickly in the MDB file.So, it seems that there was some sort of compile/optimization issue thatkicked in when I encrypted the copy of the view -- and not just for that oneview, but for the whole database (or at least the original view and itscopy). Whatever happened, it resolved the problem with the view hanging whenscrolled in the MDB file.So, my questions are: a) what happened? and b) is there a way to getwhatever happened to happen without having to make a copy of a view, encryptit, and then delete it??Thanks for any assistance.Neil
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Jul 20, 2005
I am using SQL Server 2000, SP3.I created an updatable partitioned view awhile ago and it has beenrunning smoothly for some time. The partition is on a DATETIME columnand it is partitioned by month. Each month a stored procedure isscheduled that creates the new month's table, and alters the view toinclude it. Again... working like a charm for quite some time.This past weekend I moved some of the first tables onto a new filegroup. I did this through Enterprise Manager, by going into designmode for the table, then going into the properties for the table andchanging the file group there as well as in all of the indexes. Nowthe partitioned view is no longer updatable. It gives the errormessage: "UNION ALL view '<view name>' is not updatable because apartitioning column was not found."I have extracted the DDL for all of the partition tables and comparedthem and they all look the same. I checked and then double-checked theCHECK constraints to make sure that they were all valid and they are.If I remove the tables that I moved to the new file group from theview, then it is once again updatable, but when I put them back in itfails again.Any ideas? If you would like samples of the code then I can send italong, but it's rather large, so I have not included it here.Thanks!Thomas R. Hummel
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Oct 9, 2015
I am trying to use an indexed view to allow for aggregations to be generated more quickly in my test data warehouse. The Fact Table I am creating the indexed view on is a partitioned clustered columnstore index.
I have created a view with the following code:
ALTER view dbo.FactView
with schemabinding
as
select local_date_key, meter_key, unit_key, read_type_key, sum(isnull(read_value,0)) as [s_read_value], sum(isnull(cost,0)) as [s_cost]
, sum(isnull(easy_target_value,0)) as [s_easy_target_value], sum(isnull(hard_target_value,0)) as [s_hard_target_value]
, sum(isnull(read_value,0)) as [a_read_value], sum(isnull(temperature,0)) as [a_temp], sum(isnull(co2,0)) as [s_co2]
, sum(isnull(easy_target_co2,0)) as [s_easy_target_co2]
, sum(isnull(hard_target_co2,0)) as [s_hard_target_co2], sum(isnull(temp1,0)) as [a_temp1], sum(isnull(temp2,0)) as [a_temp2]
, sum(isnull(volume,0)) as [s_volume], count_big(*) as [freq]
from dbo.FactConsumptionPart
group by local_date_key, read_type_key, meter_key, unit_key
I then created an index on the view as follows:
create unique clustered index IDX_FV on factview (local_date_key, read_type_key, meter_key, unit_key)
I then followed this up by running some large calculations that required use of the aggregation functionality on the main fact table, grouping by the clustered index columns and only returning averages and sums that are available in the view, but it still uses the underlying table to perform the aggregations, rather than the view I have created. Running an equivalent query on the view, then it takes 75% less time to query the indexed view directly, to using the fact table. I think the expected behaviour was that in SQL Server Enterprise or Developer edition (I am using developer edition), then the fact table should have used the indexed view. what I might be missing, for the query not to be using the indexed view?
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Oct 17, 2006
This one has me stumped.
I created an updateable partioned view of a very large table. Now I get an error when I attempt to declare a CURSOR that SELECTs from the view, and a FOR UPDATE argument is in the declaration.
There error generated is:
Server: Msg 16957, Level 16, State 4, Line 3
FOR UPDATE cannot be specified on a READ ONLY cursor
Here is the cursor declaration:
declare some_cursor CURSOR
for
select *
from part_view
FOR UPDATE
Any ideas, guys? Thanks in advance for knocking your head against this one.
PS: Since I tested the updateability of the view there are no issues with primary keys, uniqueness, or indexes missing. Also, unfortunately, the dreaded cursor is requried, so set based alternatives are not an option - it's from within Peoplesoft.
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Nov 23, 2004
How to optimize the following Stored procedure running on MSSQL server 2000 sp4 :
CREATE PROCEDURE proc1
@Franchise ObjectId
, @dtmStart DATETIME
, @dtmEnd DATETIME
AS
BEGIN
SET NOCOUNT ON
SELECT p.Product
, c.Currency
, c.Minor
, a.ACDef
, e.Event
, t.Dec
, count(1) "Count"
, sum(Amount) "Total"
FROM tb_Event t
JOIN tb_Prod p
ON ( t.ProdId = p.ProdId )
JOIN tb_ACDef a
ON ( t.ACDefId = a.ACDefId )
JOIN tb_Curr c
ON ( t.CurrId = c.CurrId )
JOIN tb_Event e
ON ( t.EventId = e.EventId )
JOIN tb_Setl s
ON ( s.BUId = t.BUId
and s.SetlD = t.SetlD )
WHERE Fran = @Franchise
AND t.CDate >= @dtmStart
AND t.CDate <= @dtmEnd
AND s.Status = 1
GROUP BY p.Product
, c.Currency
, c.Minor
, a.ACDef
, e.Event
, t.Dec
RETURN 1
END
GO
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Aug 15, 2007
Hi,
Can anyone help me optimize the SELECT statement in the 3rd step? I am actually writing a monthly report. So for each employee (500 employees) in a row, his attendance totals for all days in a month are displayed. The problem is that in the 3rd step, there are actually 31 SELECT statements which are assigned to 31 variables. After I assign these variable, I insert them in a Table (4th step) and display it. The troublesome part is the 3rd step. As there are 500 employees, then 500x31 times the variables are assigned and inserted in the table. This is taking more than 4 minutes which I know is not required :). Can anyone help me optimize the SELECT statements I have in the 3rd step or give a better suggestion.
DECLARE @EmpID, @DateFrom, @Total1 .... // Declaring different variables
SELECT @DateFrom = // Set to start of any month e.g. 2007-06-01 ...... 1st
Loop (condition -- Get all employees, working fine)
BEGIN
SELECT @EmpID = // Get EmployeeID ...... 2nd
SELECT @Total1 = SUM (Abences) ...... 3rd
FROM Attendance
WHERE employee_id_fk = @EmpID (from 2nd step)
AND Date_Absent = DATEADD ("day", 0, Convert (varchar, @DateFrom)) (from 1st step)
SELECT @Total2 ........................... same as above
SELECT @Total3 ........................... same as above
INSERT IN @TABLE (@EmpID, @Total1, ...... @Total31) ...... 4th
Iterate (condition) to next employee ...... 5th
END
It's only the loop which consumes the 4 minutes. If I can somehow optimize this part, I will be most satisfied. Thanks for anyone helping me....
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Feb 19, 2001
Trying to optimize a query, and having problems interpreting the data. We have a query that queries 5 tables with 4 INNER JOINS. When I use INNER HASH JOIN, this is the result:
(Using SQL Programmer)
SQL Server Execution Times:
CPU time = 40 ms, elapsed time = 80 ms.
Table 'Table1'. Scan count 1, logical reads 1, physical reads 0, read-ahead reads 0.
Table 'Table2'. Scan count 1, logical reads 40, physical reads 0, read-ahead reads 0.
Table 'Table3Category'. Scan count 1, logical reads 2, physical reads 0, read-ahead reads 0.
Table 'Table4'. Scan count 1, logical reads 1, physical reads 0, read-ahead reads 0.
Table 'Table5'. Scan count 1, logical reads 17, physical reads 0, read-ahead reads 0.
When I use INNER JOIN, this is the result:
SQL Server Execution Times:
CPU time = 10 ms, elapsed time = 34 ms.
Table 'Table1'. Scan count 4, logical reads 10, physical reads 0, read-ahead reads 0.
Table 'Table2'. Scan count 311, logical reads 670, physical reads 0, read-ahead reads 0.
Table 'Table3'. Scan count 69, logical reads 102, physical reads 0, read-ahead reads 0.
Table 'Table4'. Scan count 69, logical reads 98, physical reads 0, read-ahead reads 0.
Table 'Table5'. Scan count 1, logical reads 17, physical reads 0, read-ahead reads 0.
Now, when timing the code execution on my ASP page, it's "faster" not using the HASH. Using HASH, there are a few Hash Match/Inner Joins reported in the Execution Plan. Not using HASH, there are Bookmark Lookups/Nested Loops.
My question is which is better to "see": Boomark Lookups/Nested Loops or Hash Match/Inner Joins for the CPU/Server?
Thanks.
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Mar 14, 2003
IS there any way to rewrite this Query in optimized way?
SELECT dbo.Table1.EmpId E from dbo.Table1
where EmpId in(
SELECT dbo.Table1.EmpId
FROM (SELECT DISTINCT PersonID, MAX(dtmStatusDate) AS dtmStatusDate
FROM dbo.Table1
GROUP BY PersonID) derived_table INNER JOIN
dbo.Table1 ON derived_table.PersonID = dbo.Table1.PersonID AND
derived_table.dtmStatusDate = dbo.Table1.dtmStatusDate))
Thanks....j
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Mar 7, 2006
How can I optimized the following query:
(SELECT e.SID
FROMStudents s
JOINTable1e ON e.SID= s.SID
JOINTable2 ed ON ed.Enrollment = e.Enrollment
JOINTable3 t ON t.TNum = e.TNum
JOINTable4 bt ON bt.TNum = t.TNum
JOINTable5 b ON b.Batch = bt.Batch
JOIN IPlans i ON i.IPlan = ed.IPlan
JOINPGroups g ON g.PGroup= i.PGroup
WHERE t.TStatus= 'ACP'
ANDed.EStatus= 'APR'
ANDe.SID=(select distinct SID from Table1 where Enrollment=@DpEnrollment))
AND(ed.EffectiveDate=
(SELECT EffectiveDate
FROM Table2 ed JOIN Table1 e
ON e.enrollment=ed.enrollment
WHERE IPlan = @DpIPlan
ANDTCoord = @DpTCoord
ANDAGCoord= @DpAGCoord
ANDDCoord=@DpDCoord )
ANDDSeq= @DpDSeq)
ANDe.SID=
(select distinct SID from Table1 where Enrollment=@DpEnrollment))
)
ANDed.TerminationDate=
(SELECT TerminationDate
FROM Table2 ed JOIN Table1 e
ON e.enrollment=ed.enrollment
WHERE IPlan = @DpIPlan
ANDTCoord = @DpTCoord
ANDAGCoord= @DpAGCoord
ANDDCoord= @DpDCoord )
ANDDSeq= @DpDSeq)
ANDe.SID=
(select distinct SID from Table1 where Enrollment=@DpEnrollment))
)
))
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Mar 20, 2006
DECLARE @PTEffDate_tmp AS SMALLDATETIME
SELECT @PTEffDate_tmp = DateAdd(day, -1, PDate)
FROM PDates pd WHERE iplan = @DIPlan and pd.TCoord = @DTCoord and DType = 'EF'
DECLARE @PTCoord_tmp as char(3)
SELECT @PTCoord_tmp = tc.TCoord
FROM PDates pd JOIN TCoords tc ON (pd.TCoord = tc.TCoord)
WHERE pd.Iplan = @DIPlan and tc.TGroup = @TGroup_tmp
and PDate = @PTEffDate_tmp and DateType = 'TR1'
DECLARE @EStatus_tmp as char(3)
SELECT @EStatus_tmp = EDStatus From EDetails ed
JOIN ENR e ON (ed.enr = e.enr)
JOIN Trans t ON (e.transID = t.TransID)
WHERE iplan = @DIPlan
and ed.TCoord = @PTCoord_tmp
and t.TransS= 'ACP'
and DCoord = @DCoord
and CEnr is null
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Aug 17, 2006
How can I optimazed my query. Since my DB is more then 1 mln it takes a while to do all those join?
select *
FROM EEMaster eem
JOIN NHistory nh
ON eem.SNumber = nh.SNumber
OR eem.OldNumber = nh.SNumber
OR eem.CID = (Replicate ('0',12-len( nh.SNumber))+ nh.SNumber )
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Apr 23, 2008
I work on tables containing 10 million plus records.
What are the general steps needed to ensure that my queries run faster?
I know a few:
- The join fields should be indexed
-Selecting only needed fields
-Using CTE or derived tables as much as I can
-Using good table reference
eg
select a.x , b.y
from TableA a inner join TableB b
on a.id = b.id
I will be happy if somebody could share or add more to my list.
Regards to all
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