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   comp.databases.ms-sqlserver      Notorious Rube Goldberg contraption      19,505 messages   

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   Message 17,804 of 19,505   
   Erland Sommarskog to --CELKO--   
   Re: How do you prevent predicate optimiz   
   08 May 10 10:49:59   
   
   2c342595   
   From: esquel@sommarskog.se   
      
   --CELKO-- (jcelko212@earthlink.net) writes:   
   > The usual re-write is:   
   >   
   > SELECT *   
   >   FROM A   
   >  WHERE b = 31   
   >     OR b = 78;   
      
   In SQL Server, this rewrite is performed in the parsing layer, and what   
   the optimizer sees is the above which thus above is identifical with the   
   original query.   
      
   --   
   Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se   
      
   Links for SQL Server Books Online:   
   SQL 2008: http://msdn.microsoft.com/en-us/sqlserver/cc514207.aspx   
   SQL 2005: http://msdn.microsoft.com/en-us/sqlserver/bb895970.aspx   
   SQL 2000: http://www.microsoft.com/sql/prodinfo/previousversions/books.mspx   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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