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SQL 2008 Indexes
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SQL 2008 Indexes
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SA-1
SA-1
Posted Tuesday, February 03, 2009 12:54 AM
Ten Centuries
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Comments posted to this topic are about the item
SQL 2008 Indexes
Post #648612
MarkusB
MarkusB
Posted Tuesday, February 03, 2009 12:56 AM
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Ok, I got it right and I don't really want to complain about the question. In fact I think it's a pretty good question.
But what I find strange is that the question is placed under the header SQL 2008 indexes, but the link in the answer refers to BOL for SQL 2005.
Markus Bohse
Post #648614
Tao Klerks
Tao Klerks
Posted Tuesday, February 03, 2009 5:53 AM
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I agree, this is a very good question, but there's something I can't figure out or find in a quick search: Why would you ever want to disable a primary key or other clustered index??
Does anyone know of use cases?
Thanks,
Tao
http://poorsql.com
for T-SQL formatting: free as in speech, free as in beer, free to run in SSMS or on your version control server - free however you want it.
Post #648748
Ninja's_RGR'us
Ninja's_RGR'us
Posted Tuesday, February 03, 2009 9:24 AM
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I don't know, maybe do a manual import and then delete the dupes??? That's not the way I'd do it, but who am I to say something on that subject ;).
Post #648985
Cliff Jones
Cliff Jones
Posted Tuesday, February 03, 2009 10:06 AM
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According to the guidelines, inserts will fail also. I agree, I am not sure why you would ever want to disable the clustered index. I can't come up with a sound reason.
Post #649047
Cliff Jones
Cliff Jones
Posted Tuesday, February 03, 2009 10:10 AM
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I guess it is a way to take the table offline while preparing to do something with it. That's all I can think of.
Post #649058
noeld
noeld
Posted Tuesday, February 03, 2009 10:41 AM
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Actually I have had the need for this feature for a long time.
Suppose you need to prevent changes on ONE table while you are doing some maintenance work in a Db.
To Set a DB in read-only mode is too drastic, To Setup that table in a separated File and make it read only is inconvenient.
To setup INSTEAD OF/AFTER TRIGGERS is expensive in Server resources.
This solution seems cheap and Fast ;)
* Noel
Post #649104
Cliff Jones
Cliff Jones
Posted Tuesday, February 03, 2009 11:18 AM
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Yes, that makes sense since there is no way to take a table offline like you can in Oracle.
Post #649141
Tao Klerks
Tao Klerks
Posted Tuesday, February 03, 2009 11:22 AM
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Thanks Noel, that makes sense - I'm not sure it's very "cheap" because the clustered index gets rebuilt when it gets re-enabled (according to the BOL article), but still seems better than the alternatives!
http://poorsql.com
for T-SQL formatting: free as in speech, free as in beer, free to run in SSMS or on your version control server - free however you want it.
Post #649147
Ninja's_RGR'us
Ninja's_RGR'us
Posted Tuesday, February 03, 2009 12:22 PM
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I think I'd go with the instead of triggers... if it saves me a full clustered index rebuild.
Post #649202
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