<a href="http://g.adspeed.net/ad.php?do=clk&zid=15220&wd=468&ht=60&pair=as" target="_blank"><img style="border:0px;" src="http://g.adspeed.net/ad.php?do=img&zid=15220&wd=468&ht=60&pair=as" alt="i" width="468" height="60"/></a>
Log in
::
Register
::
Not logged in
Home
Tags
Articles
Editorials
Stairways
Forums
Scripts
Videos
Blogs
QotD
Books
Ask SSC
SQL Jobs
Training
Authors
About us
Contact us
Newsletters
Write for us
<a href="http://g.adspeed.net/ad.php?do=clk&zid=15491&wd=120&ht=300&pair=as" target="_top"><img style="border:0px;" src="http://g.adspeed.net/ad.php?do=img&zid=15491&wd=120&ht=300&pair=as" alt="i" width="120" height="300"/></a>
Recent Posts
Recent Posts
Popular Topics
Popular Topics
Home
Search
Members
Calendar
Who's On
Home
»
SQL Server 2008
»
SQL Server 2008 Administration
»
Create index with DROP_Existing
Create index with DROP_Existing
Rate Topic
Display Mode
Topic Options
Author
Message
pooyan_pdm
pooyan_pdm
Posted Thursday, August 16, 2012 1:26 PM
SSC-Enthusiastic
Group: General Forum Members
Last Login: Friday, June 07, 2013 2:47 PM
Points: 108,
Visits: 362
Some Questions about Create index ... with Drop_Existing
1) in case of Create Clustered index ... with Drop_existing=on non-clustered indexes are rebuilt only once using this option or not at all if the key definition is the same.Is this done by creating another copy of the clustered index(and keeping the old one until the new clustered index is created) or it places some locks on the non-clustered index and defers rebuilding that (if necessary) until the new clustered index is created?
2)in case of Create Non-Clustered index ... with Drop_existing=on what does it exactly do?are users able to use the non-clustered index during build process?
Cheers ,
Pooyan D
________________________________________________
Microsoft Certified Technology Specialist : SQL Server 2008
Post #1346220
Grant Fritchey
Grant Fritchey
Posted Friday, August 17, 2012 4:20 AM
SSChampion
Group: General Forum Members
Last Login: Yesterday @ 9:49 AM
Points: 13,436,
Visits: 25,281
Drop does exactly what it says. It's going to drop the existing index and then rebuild it. No, it won't leave the existing index available while it does the rebuild... unless you're also doing ONLINE operations with the index. Then the other index will stay in place while the create operation occurs. This will take extra tempdb space, so be ready for that.
----------------------------------------------------
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood..." Theodore Roosevelt
The Scary DBA
Author of:
SQL Server 2012 Query Performance Tuning
SQL Server 2008 Query Performance Tuning Distilled
and
SQL Server Execution Plans
Product Evangelist for
Red Gate Software
Post #1346455
pooyan_pdm
pooyan_pdm
Posted Friday, August 17, 2012 11:38 AM
SSC-Enthusiastic
Group: General Forum Members
Last Login: Friday, June 07, 2013 2:47 PM
Points: 108,
Visits: 362
So there's no difference between using DROP_EXISTING=ON,ONLINE=OFF and dropping and recreating a non-Clustered index .Is there?
Cheers ,
Pooyan D
________________________________________________
Microsoft Certified Technology Specialist : SQL Server 2008
Post #1346688
GilaMonster
GilaMonster
Posted Friday, August 17, 2012 11:49 AM
SSC-Dedicated
Group: General Forum Members
Last Login: Today @ 1:57 PM
Points: 38,092,
Visits: 30,387
Other than that with drop.. create there's potential for queries to use the table between the drop and the create, no.
Gail Shaw
Microsoft Certified Master: SQL Server 2008, MVP
SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass
Post #1346691
pooyan_pdm
pooyan_pdm
Posted Friday, August 17, 2012 12:06 PM
SSC-Enthusiastic
Group: General Forum Members
Last Login: Friday, June 07, 2013 2:47 PM
Points: 108,
Visits: 362
Thanks
Cheers ,
Pooyan D
________________________________________________
Microsoft Certified Technology Specialist : SQL Server 2008
Post #1346694
SQLCrazyCertified
SQLCrazyCertified
Posted Monday, August 20, 2012 6:09 AM
Old Hand
Group: General Forum Members
Last Login: Yesterday @ 12:12 PM
Points: 320,
Visits: 1,916
Grant Fritchey (8/17/2012)
Drop does exactly what it says. It's going to drop the existing index and then rebuild it. No, it won't leave the existing index available while it does the rebuild... unless you're also doing ONLINE operations with the index. Then the other index will stay in place while the create operation occurs. This will take extra tempdb space, so be ready for that.
Can u rebuild index online? I thought index rebuild must be offline, index reorg is done online. Please advise.
Thanks,
SueTons
Post #1347117
GilaMonster
GilaMonster
Posted Monday, August 20, 2012 6:28 AM
SSC-Dedicated
Group: General Forum Members
Last Login: Today @ 1:57 PM
Points: 38,092,
Visits: 30,387
Sure you can. Use the ONLINE keyword when rebuilding the index.
Gail Shaw
Microsoft Certified Master: SQL Server 2008, MVP
SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass
Post #1347130
« Prev Topic
|
Next Topic »
Permissions
You
cannot
post new topics.
You
cannot
post topic replies.
You
cannot
post new polls.
You
cannot
post replies to polls.
You
cannot
edit your own topics.
You
cannot
delete your own topics.
You
cannot
edit other topics.
You
cannot
delete other topics.
You
cannot
edit your own posts.
You
cannot
edit other posts.
You
cannot
delete your own posts.
You
cannot
delete other posts.
You
cannot
post events.
You
cannot
edit your own events.
You
cannot
edit other events.
You
cannot
delete your own events.
You
cannot
delete other events.
You
cannot
send private messages.
You
cannot
send emails.
You
may
read topics.
You
cannot
rate topics.
You
cannot
vote within polls.
You
cannot
upload attachments.
You
may
download attachments.
You
cannot
post HTML code.
You
cannot
edit HTML code.
You
cannot
post IFCode.
You
cannot
post JavaScript.
You
cannot
post EmotIcons.
You
cannot
post or upload images.
Copyright © 2002-2013 Simple Talk Publishing. All Rights Reserved.
Privacy Policy.
Terms of Use.
Report Abuse.
