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Discuss content posted by Mohd Nizamuddin
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Ray Laubert
Ray Laubert
Posted Tuesday, December 08, 2009 9:34 AM
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Last Login: Tuesday, April 03, 2012 8:35 AM
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Thanks, that is what I would have expected. CharIndex would create a situation that invalidates the Index View and basically forces SQL to the underlying tables.
But this does not in itself invalidate the question.
Raymond Laubert
Exceptional DBA of 2009 Finalist
MCT, MCDBA, MCITP:SQL 2005 Admin,
MCSE, OCP:10g
Post #830796
Adam Haines
Adam Haines
Posted Tuesday, December 08, 2009 4:06 PM
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You have to add the noexpand hint to the query to use the view's index. The noexpand hint forces the optimizer to use the views data instead of the underlying tables and indexes. You have to remember that the optimizer is still cost efficient and sometimes it thinks the using the underlying data is cheaper than using the view data, which may be true in certain cases. Anyway you must use the noexpand hint to make the optimizer look at the view and its indexes only. On the flip side, you can use the expand hint to make the optimizer expand the view.
My blog:
http://jahaines.blogspot.com
Post #831094
mohd.nizamuddin
mohd.nizamuddin
Posted Tuesday, December 08, 2009 9:04 PM
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Thanks a lot Steve.
Post #831145
hakan.winther
hakan.winther
Posted Wednesday, December 09, 2009 1:46 AM
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Ray Laubert (12/8/2009)
Thanks, that is what I would have expected. CharIndex would create a situation that invalidates the Index View and basically forces SQL to the underlying tables.
But this does not in itself invalidate the question.
You are right it doesn't invalidate the question, but it is misleading information to everyone trying to create an indexed view with char index, and I think that is a bad.
/Håkan Winther
MCITP:Database Developer 2008
Post #831212
stoklosa
stoklosa
Posted Thursday, December 10, 2009 7:50 AM
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What's about this question?
In SQL 2000 - CharIndex is nondeterministic
http://msdn.microsoft.com/en-us/library/aa214775(SQL.80).aspx
In SQL 2005 - CharIndex is deterministic
http://msdn.microsoft.com/en-us/library/ms178091(SQL.90).aspx
Sorry, but question didn't precise about which version sql server was going.
Please give me my lost point :)
Post #832235
BudaCli
BudaCli
Posted Tuesday, December 15, 2009 1:43 AM
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Ray Laubert (12/8/2009)
Wasn't sure about CharIndex ...Has anyone ever used CharIndex on an indexed view?
But this was not because of the null reason...
What you don't know won't hurt you but what you know will make you plan to know better
Post #834338
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