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  SQL Server Tips by Gama and Naughter

XP_INI_READ

This is the corollary function to XP_INI_WRITE and is used to read a non-integer or non-string data. If we knew before hand the size of the structure we had previously written to the ini file, then we could call the SDK function “GetPrivateProfileStruct“, but the problem is that this function assumes you know the size of the structure you are reading beforehand. It also does not allow this value to be discovered at runtime. Instead the code uses the “GetPrivateProfileString“ function to read the data in as a string. Then it decodes the data as it is encoded in the ini file, ignoring the checksum, and finally it returns the data using “CExtendedStoredProcedure::ParamSetOutput“.
 


The above book excerpt is from:

Super SQL Server Systems
Turbocharge Database Performance with C++ External Procedures

ISBN: 0-9761573-2-2
Joseph Gama, P. J. Naughter

 http://www.rampant-books.com/book_2005_2_sql_server_external_procedures.htm  

   

 

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