Creation Of Aligned Partitioned Indexes

Jul 24, 2007

Hi All,

In the manual I find the following comment for creating indexes.



"If partition_scheme_name or filegroup is not specified and the table is partitioned, the index is placed in the same partition scheme, using the same partitioning column, as the underlying table."



We are creating some dimensional models in SQL Server with about 100M rows in the largest fact tables.



What I have created are base tables which were on 'primary' and then created a clustered index over a partitioning scheme. I did this as I figured the data will go into the clustered index in any case.



However, when I then create indexes on these tables they do not look like they are petitioned....at least not as far as I can tell.



Q1. Is there some way to tell if the index was partitioned properly?

Q2. If the index is not partitioned is there any simply way to alter the table to the partitioning scheme? My reading of the manual tells me I have to unload, truncate, alter and then reload the table. Is there a better way?



Thanks in advance for your assistance.



Best Regards

Peter

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We are running SQL Server 2014 Enterprise Edition (64-Bit) on Windows 2012 R2 Standard (64-Bit).

1. When to create indexes, before or after data is added? Please address Clustered and Non-Clustered Indexes.

2. To move indexes to it's own filegroup, is it best to create the NON-Clustered Indexes on the separate filegroup with code similar to the example below?

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ON HumanResources.Employee (OrganizationLevel, OrganizationNode)
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Placing Indexes on Filegroups:

[URL]

By default, indexes are stored in the same filegroup as the base table on which the index is created. A nonpartitioned clustered index and the base table always reside in the same filegroup. However, you can do the following:

• Create nonclustered indexes on a filegroup other than the filegroup of the base table.

Move an Existing Index to a Different Filegroup:

[URL]

Limitations and Restrictions

• If a table has a clustered index, moving the clustered index to a new filegroup moves the table to that filegroup.

• You cannot move indexes created using a UNIQUE or PRIMARY KEY constraint using Management Studio. To move these indexes use the CREATE INDEX statement with the (DROP_EXISTING=ON) option in Transact-SQL.

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Code Block

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Hi,

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By Don Schlichting

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While running sample:
USE test
GO

CREATE VIEW AllAuthors
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GO

I got the error message:
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cod_operacao int NOT NULL ,
cod_contrato int NOT NULL ,
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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
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GO

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GO

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union all
select * from tb_sld_cob_pap_2
union all
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union all
select * from tb_sld_cob_pap_4
union all
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union all
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I'm using this script in other database and I don't have this problem.



Thank you...

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USE Northwind
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, CHECK(PostDate> '1/1/1999' and PostDate < '12/31/1999 23:59:59'))
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CREATE INDEX myTable99_2_IX ON MyTable99_2
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CREATE INDEX myTable99_3_IX ON MyTable99_3
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GO

CREATE VIEW myView99
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UNION ALL
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DROP VIEW myView99
DROP TABLE myTable99_1, myTable99_2, myTable99_3
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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 19, 2008



Hello,

I am implementing a table partitioning on our database with TSQL.
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Based on your experience is it possible a solution like that?


Thank

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[Code]....

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Hello;


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create partition function pf_LoadDate(Datetime)

as range right for

values ('01/01/1997','01/01/1999','01/01/2001','01/01/2002','01/01/2003',
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--------------



create partition Scheme ps_RecBuyLoadDateScheme

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Prok

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Hi all,

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Hello all,
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Hmm.... strange......ghost...ooooooo?

I have created a simple test to reproduce:






Code Snippet

CREATE PARTITION FUNCTION [PTFunction](int) AS RANGE LEFT FOR VALUES (1,2,3)

GO

CREATE PARTITION SCHEME [PTDataScheme] AS PARTITION [PTFunction] TO ([PRIMARY], [PRIMARY], [PRIMARY], [PRIMARY])

GO

CREATE TABLE tblPartitionTest(

ID int identity(1,1) ,

PartitionKey int,

Sales money)

ON PTDataScheme(PartitionKey)

GO

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(1,10.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(1,20.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(1,30.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(1,40.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(1,50.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(2,10.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(2,20.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(2,30.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(2,40.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(2,50.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(3,10.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(3,20.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(3,30.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(3,40.00);

INSERT INTO tblPartitionTest(PartitionKey,Sales) VALUES(3,50.00);

set showplan_text on;

-- query using the set value as a constraint

select * from tblpartitiontest

where partitionkey = 2

--show plan text on result:

|--Table Scan(OBJECT:([tblPartitionTest]), WHERE:([tblPartitionTest].[PartitionKey]=(2)) PARTITION ID:((2)))

-- query using the parameter as a constraint

declare @param_partitionkey int

set @param_partitionkey = 2

select * from tblpartitiontest

where partitionkey = @param_partitionkey

--show plan text on result:

|--Table Scan(OBJECT:([tblPartitionTest]), WHERE:([tblPartitionTest].[PartitionKey]=[@param_partitionkey]) PARTITION ID:(RangePartitionNew([@param_partitionkey],(0),(1),(2),(3))))



BTW I have reproduce this in SP 2 as well.



Any thoughts?

Thanks

Eric





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rs.open sqlstring, etc, etc, etc
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Thanks in advance !

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