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16/02/2015 17:51:35
 
Information générale
Forum:
Microsoft SQL Server
Catégorie:
Indexation
Versions des environnements
SQL Server:
SQL Server 2012
Application:
Web
Divers
Thread ID:
01615300
Message ID:
01615437
Vues:
55
J'aime (1)
>>Indexes are based upon statistics. If the index is not there, the statistic is missing. Apparently adding the index lets the optimizer conclude not to use the index because the cost is too high. It could not draw that conclusion without the index because then the statistics were missing
>
>So the optimizer wants the index so it knows it doesn't want the index.
>
>There is something witty here to say about MSSQL being either like a cat or a woman... I can't decide.


Hmmm ... I wonder if I should be offended by that? < g >
Bonnie Berent DeWitt
NET/C# MVP since 2003

http://geek-goddess-bonnie.blogspot.com
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